![Ville Syrjälä](/assets/img/avatar_default.png)
Done with coccinelle for the most part. However, it thinks '...' is part of the semantic patch, so I put an 'int DOTDOTDOT' placeholder in its place and got rid of it with sed afterwards. @@ identifier dev, encoder, funcs; @@ int drm_encoder_init(struct drm_device *dev, struct drm_encoder *encoder, const struct drm_encoder_funcs *funcs, int encoder_type + ,const char *name, int DOTDOTDOT ) { ... } @@ identifier dev, encoder, funcs; @@ int drm_encoder_init(struct drm_device *dev, struct drm_encoder *encoder, const struct drm_encoder_funcs *funcs, int encoder_type + ,const char *name, int DOTDOTDOT ); @@ expression E1, E2, E3, E4; @@ drm_encoder_init(E1, E2, E3, E4 + ,NULL ) v2: Add ', or NULL...' to @name kernel doc (Jani) Annotate the function with __printf() attribute (Jani) Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1449670818-2966-1-git-send-email-ville.syrjala@linux.intel.com
2148 lines
56 KiB
C
2148 lines
56 KiB
C
/*
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* Copyright © 2012 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Keith Packard <keithp@keithp.com>
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*
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*/
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include "psb_drv.h"
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#include "psb_intel_drv.h"
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#include "psb_intel_reg.h"
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#include "gma_display.h"
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#include <drm/drm_dp_helper.h>
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/**
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* struct i2c_algo_dp_aux_data - driver interface structure for i2c over dp
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* aux algorithm
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* @running: set by the algo indicating whether an i2c is ongoing or whether
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* the i2c bus is quiescent
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* @address: i2c target address for the currently ongoing transfer
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* @aux_ch: driver callback to transfer a single byte of the i2c payload
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*/
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struct i2c_algo_dp_aux_data {
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bool running;
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u16 address;
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int (*aux_ch) (struct i2c_adapter *adapter,
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int mode, uint8_t write_byte,
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uint8_t *read_byte);
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};
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/* Run a single AUX_CH I2C transaction, writing/reading data as necessary */
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static int
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i2c_algo_dp_aux_transaction(struct i2c_adapter *adapter, int mode,
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uint8_t write_byte, uint8_t *read_byte)
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{
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struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
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int ret;
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ret = (*algo_data->aux_ch)(adapter, mode,
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write_byte, read_byte);
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return ret;
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}
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/*
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* I2C over AUX CH
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*/
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/*
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* Send the address. If the I2C link is running, this 'restarts'
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* the connection with the new address, this is used for doing
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* a write followed by a read (as needed for DDC)
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*/
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static int
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i2c_algo_dp_aux_address(struct i2c_adapter *adapter, u16 address, bool reading)
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{
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struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
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int mode = MODE_I2C_START;
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int ret;
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if (reading)
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mode |= MODE_I2C_READ;
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else
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mode |= MODE_I2C_WRITE;
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algo_data->address = address;
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algo_data->running = true;
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ret = i2c_algo_dp_aux_transaction(adapter, mode, 0, NULL);
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return ret;
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}
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/*
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* Stop the I2C transaction. This closes out the link, sending
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* a bare address packet with the MOT bit turned off
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*/
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static void
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i2c_algo_dp_aux_stop(struct i2c_adapter *adapter, bool reading)
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{
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struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
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int mode = MODE_I2C_STOP;
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if (reading)
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mode |= MODE_I2C_READ;
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else
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mode |= MODE_I2C_WRITE;
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if (algo_data->running) {
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(void) i2c_algo_dp_aux_transaction(adapter, mode, 0, NULL);
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algo_data->running = false;
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}
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}
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/*
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* Write a single byte to the current I2C address, the
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* the I2C link must be running or this returns -EIO
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*/
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static int
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i2c_algo_dp_aux_put_byte(struct i2c_adapter *adapter, u8 byte)
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{
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struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
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int ret;
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if (!algo_data->running)
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return -EIO;
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ret = i2c_algo_dp_aux_transaction(adapter, MODE_I2C_WRITE, byte, NULL);
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return ret;
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}
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/*
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* Read a single byte from the current I2C address, the
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* I2C link must be running or this returns -EIO
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*/
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static int
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i2c_algo_dp_aux_get_byte(struct i2c_adapter *adapter, u8 *byte_ret)
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{
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struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
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int ret;
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if (!algo_data->running)
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return -EIO;
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ret = i2c_algo_dp_aux_transaction(adapter, MODE_I2C_READ, 0, byte_ret);
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return ret;
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}
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static int
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i2c_algo_dp_aux_xfer(struct i2c_adapter *adapter,
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struct i2c_msg *msgs,
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int num)
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{
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int ret = 0;
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bool reading = false;
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int m;
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int b;
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for (m = 0; m < num; m++) {
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u16 len = msgs[m].len;
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u8 *buf = msgs[m].buf;
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reading = (msgs[m].flags & I2C_M_RD) != 0;
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ret = i2c_algo_dp_aux_address(adapter, msgs[m].addr, reading);
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if (ret < 0)
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break;
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if (reading) {
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for (b = 0; b < len; b++) {
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ret = i2c_algo_dp_aux_get_byte(adapter, &buf[b]);
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if (ret < 0)
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break;
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}
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} else {
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for (b = 0; b < len; b++) {
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ret = i2c_algo_dp_aux_put_byte(adapter, buf[b]);
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if (ret < 0)
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break;
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}
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}
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if (ret < 0)
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break;
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}
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if (ret >= 0)
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ret = num;
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i2c_algo_dp_aux_stop(adapter, reading);
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DRM_DEBUG_KMS("dp_aux_xfer return %d\n", ret);
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return ret;
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}
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static u32
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i2c_algo_dp_aux_functionality(struct i2c_adapter *adapter)
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{
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return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
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I2C_FUNC_SMBUS_READ_BLOCK_DATA |
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I2C_FUNC_SMBUS_BLOCK_PROC_CALL |
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I2C_FUNC_10BIT_ADDR;
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}
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static const struct i2c_algorithm i2c_dp_aux_algo = {
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.master_xfer = i2c_algo_dp_aux_xfer,
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.functionality = i2c_algo_dp_aux_functionality,
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};
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static void
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i2c_dp_aux_reset_bus(struct i2c_adapter *adapter)
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{
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(void) i2c_algo_dp_aux_address(adapter, 0, false);
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(void) i2c_algo_dp_aux_stop(adapter, false);
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}
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static int
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i2c_dp_aux_prepare_bus(struct i2c_adapter *adapter)
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{
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adapter->algo = &i2c_dp_aux_algo;
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adapter->retries = 3;
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i2c_dp_aux_reset_bus(adapter);
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return 0;
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}
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/*
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* FIXME: This is the old dp aux helper, gma500 is the last driver that needs to
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* be ported over to the new helper code in drm_dp_helper.c like i915 or radeon.
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*/
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static int __deprecated
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i2c_dp_aux_add_bus(struct i2c_adapter *adapter)
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{
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int error;
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error = i2c_dp_aux_prepare_bus(adapter);
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if (error)
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return error;
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error = i2c_add_adapter(adapter);
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return error;
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}
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#define _wait_for(COND, MS, W) ({ \
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unsigned long timeout__ = jiffies + msecs_to_jiffies(MS); \
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int ret__ = 0; \
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while (! (COND)) { \
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if (time_after(jiffies, timeout__)) { \
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ret__ = -ETIMEDOUT; \
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break; \
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} \
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if (W && !in_dbg_master()) msleep(W); \
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} \
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ret__; \
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})
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#define wait_for(COND, MS) _wait_for(COND, MS, 1)
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#define DP_LINK_CHECK_TIMEOUT (10 * 1000)
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#define DP_LINK_CONFIGURATION_SIZE 9
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#define CDV_FAST_LINK_TRAIN 1
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struct cdv_intel_dp {
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uint32_t output_reg;
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uint32_t DP;
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uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE];
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bool has_audio;
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int force_audio;
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uint32_t color_range;
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uint8_t link_bw;
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uint8_t lane_count;
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uint8_t dpcd[4];
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struct gma_encoder *encoder;
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struct i2c_adapter adapter;
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struct i2c_algo_dp_aux_data algo;
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uint8_t train_set[4];
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uint8_t link_status[DP_LINK_STATUS_SIZE];
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int panel_power_up_delay;
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int panel_power_down_delay;
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int panel_power_cycle_delay;
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int backlight_on_delay;
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int backlight_off_delay;
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struct drm_display_mode *panel_fixed_mode; /* for eDP */
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bool panel_on;
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};
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struct ddi_regoff {
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uint32_t PreEmph1;
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uint32_t PreEmph2;
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uint32_t VSwing1;
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uint32_t VSwing2;
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uint32_t VSwing3;
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uint32_t VSwing4;
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uint32_t VSwing5;
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};
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static struct ddi_regoff ddi_DP_train_table[] = {
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{.PreEmph1 = 0x812c, .PreEmph2 = 0x8124, .VSwing1 = 0x8154,
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.VSwing2 = 0x8148, .VSwing3 = 0x814C, .VSwing4 = 0x8150,
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.VSwing5 = 0x8158,},
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{.PreEmph1 = 0x822c, .PreEmph2 = 0x8224, .VSwing1 = 0x8254,
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.VSwing2 = 0x8248, .VSwing3 = 0x824C, .VSwing4 = 0x8250,
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.VSwing5 = 0x8258,},
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};
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static uint32_t dp_vswing_premph_table[] = {
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0x55338954, 0x4000,
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0x554d8954, 0x2000,
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0x55668954, 0,
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0x559ac0d4, 0x6000,
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};
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/**
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* is_edp - is the given port attached to an eDP panel (either CPU or PCH)
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* @intel_dp: DP struct
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*
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* If a CPU or PCH DP output is attached to an eDP panel, this function
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* will return true, and false otherwise.
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*/
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static bool is_edp(struct gma_encoder *encoder)
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{
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return encoder->type == INTEL_OUTPUT_EDP;
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}
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static void cdv_intel_dp_start_link_train(struct gma_encoder *encoder);
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static void cdv_intel_dp_complete_link_train(struct gma_encoder *encoder);
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static void cdv_intel_dp_link_down(struct gma_encoder *encoder);
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static int
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cdv_intel_dp_max_lane_count(struct gma_encoder *encoder)
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{
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struct cdv_intel_dp *intel_dp = encoder->dev_priv;
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int max_lane_count = 4;
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if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) {
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max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f;
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switch (max_lane_count) {
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case 1: case 2: case 4:
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break;
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default:
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max_lane_count = 4;
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}
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}
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return max_lane_count;
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}
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static int
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cdv_intel_dp_max_link_bw(struct gma_encoder *encoder)
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{
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struct cdv_intel_dp *intel_dp = encoder->dev_priv;
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int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE];
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switch (max_link_bw) {
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case DP_LINK_BW_1_62:
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case DP_LINK_BW_2_7:
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break;
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default:
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max_link_bw = DP_LINK_BW_1_62;
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break;
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}
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return max_link_bw;
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}
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static int
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cdv_intel_dp_link_clock(uint8_t link_bw)
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{
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if (link_bw == DP_LINK_BW_2_7)
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return 270000;
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else
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return 162000;
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}
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static int
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cdv_intel_dp_link_required(int pixel_clock, int bpp)
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{
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return (pixel_clock * bpp + 7) / 8;
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}
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static int
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cdv_intel_dp_max_data_rate(int max_link_clock, int max_lanes)
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{
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return (max_link_clock * max_lanes * 19) / 20;
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}
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static void cdv_intel_edp_panel_vdd_on(struct gma_encoder *intel_encoder)
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{
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struct drm_device *dev = intel_encoder->base.dev;
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struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv;
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u32 pp;
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if (intel_dp->panel_on) {
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DRM_DEBUG_KMS("Skip VDD on because of panel on\n");
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return;
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}
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DRM_DEBUG_KMS("\n");
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pp = REG_READ(PP_CONTROL);
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pp |= EDP_FORCE_VDD;
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REG_WRITE(PP_CONTROL, pp);
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REG_READ(PP_CONTROL);
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msleep(intel_dp->panel_power_up_delay);
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}
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static void cdv_intel_edp_panel_vdd_off(struct gma_encoder *intel_encoder)
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{
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struct drm_device *dev = intel_encoder->base.dev;
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u32 pp;
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DRM_DEBUG_KMS("\n");
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pp = REG_READ(PP_CONTROL);
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pp &= ~EDP_FORCE_VDD;
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REG_WRITE(PP_CONTROL, pp);
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REG_READ(PP_CONTROL);
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}
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/* Returns true if the panel was already on when called */
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static bool cdv_intel_edp_panel_on(struct gma_encoder *intel_encoder)
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{
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struct drm_device *dev = intel_encoder->base.dev;
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struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv;
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u32 pp, idle_on_mask = PP_ON | PP_SEQUENCE_NONE;
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if (intel_dp->panel_on)
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return true;
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DRM_DEBUG_KMS("\n");
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pp = REG_READ(PP_CONTROL);
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pp &= ~PANEL_UNLOCK_MASK;
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pp |= (PANEL_UNLOCK_REGS | POWER_TARGET_ON);
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REG_WRITE(PP_CONTROL, pp);
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REG_READ(PP_CONTROL);
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if (wait_for(((REG_READ(PP_STATUS) & idle_on_mask) == idle_on_mask), 1000)) {
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DRM_DEBUG_KMS("Error in Powering up eDP panel, status %x\n", REG_READ(PP_STATUS));
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intel_dp->panel_on = false;
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} else
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intel_dp->panel_on = true;
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msleep(intel_dp->panel_power_up_delay);
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return false;
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}
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static void cdv_intel_edp_panel_off (struct gma_encoder *intel_encoder)
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{
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struct drm_device *dev = intel_encoder->base.dev;
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u32 pp, idle_off_mask = PP_ON ;
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struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv;
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DRM_DEBUG_KMS("\n");
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pp = REG_READ(PP_CONTROL);
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if ((pp & POWER_TARGET_ON) == 0)
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return;
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intel_dp->panel_on = false;
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pp &= ~PANEL_UNLOCK_MASK;
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/* ILK workaround: disable reset around power sequence */
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pp &= ~POWER_TARGET_ON;
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pp &= ~EDP_FORCE_VDD;
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pp &= ~EDP_BLC_ENABLE;
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REG_WRITE(PP_CONTROL, pp);
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REG_READ(PP_CONTROL);
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DRM_DEBUG_KMS("PP_STATUS %x\n", REG_READ(PP_STATUS));
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if (wait_for((REG_READ(PP_STATUS) & idle_off_mask) == 0, 1000)) {
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DRM_DEBUG_KMS("Error in turning off Panel\n");
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}
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msleep(intel_dp->panel_power_cycle_delay);
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DRM_DEBUG_KMS("Over\n");
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}
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static void cdv_intel_edp_backlight_on (struct gma_encoder *intel_encoder)
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{
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struct drm_device *dev = intel_encoder->base.dev;
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u32 pp;
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|
|
DRM_DEBUG_KMS("\n");
|
|
/*
|
|
* If we enable the backlight right away following a panel power
|
|
* on, we may see slight flicker as the panel syncs with the eDP
|
|
* link. So delay a bit to make sure the image is solid before
|
|
* allowing it to appear.
|
|
*/
|
|
msleep(300);
|
|
pp = REG_READ(PP_CONTROL);
|
|
|
|
pp |= EDP_BLC_ENABLE;
|
|
REG_WRITE(PP_CONTROL, pp);
|
|
gma_backlight_enable(dev);
|
|
}
|
|
|
|
static void cdv_intel_edp_backlight_off (struct gma_encoder *intel_encoder)
|
|
{
|
|
struct drm_device *dev = intel_encoder->base.dev;
|
|
struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv;
|
|
u32 pp;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
gma_backlight_disable(dev);
|
|
msleep(10);
|
|
pp = REG_READ(PP_CONTROL);
|
|
|
|
pp &= ~EDP_BLC_ENABLE;
|
|
REG_WRITE(PP_CONTROL, pp);
|
|
msleep(intel_dp->backlight_off_delay);
|
|
}
|
|
|
|
static int
|
|
cdv_intel_dp_mode_valid(struct drm_connector *connector,
|
|
struct drm_display_mode *mode)
|
|
{
|
|
struct gma_encoder *encoder = gma_attached_encoder(connector);
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
int max_link_clock = cdv_intel_dp_link_clock(cdv_intel_dp_max_link_bw(encoder));
|
|
int max_lanes = cdv_intel_dp_max_lane_count(encoder);
|
|
struct drm_psb_private *dev_priv = connector->dev->dev_private;
|
|
|
|
if (is_edp(encoder) && intel_dp->panel_fixed_mode) {
|
|
if (mode->hdisplay > intel_dp->panel_fixed_mode->hdisplay)
|
|
return MODE_PANEL;
|
|
if (mode->vdisplay > intel_dp->panel_fixed_mode->vdisplay)
|
|
return MODE_PANEL;
|
|
}
|
|
|
|
/* only refuse the mode on non eDP since we have seen some weird eDP panels
|
|
which are outside spec tolerances but somehow work by magic */
|
|
if (!is_edp(encoder) &&
|
|
(cdv_intel_dp_link_required(mode->clock, dev_priv->edp.bpp)
|
|
> cdv_intel_dp_max_data_rate(max_link_clock, max_lanes)))
|
|
return MODE_CLOCK_HIGH;
|
|
|
|
if (is_edp(encoder)) {
|
|
if (cdv_intel_dp_link_required(mode->clock, 24)
|
|
> cdv_intel_dp_max_data_rate(max_link_clock, max_lanes))
|
|
return MODE_CLOCK_HIGH;
|
|
|
|
}
|
|
if (mode->clock < 10000)
|
|
return MODE_CLOCK_LOW;
|
|
|
|
return MODE_OK;
|
|
}
|
|
|
|
static uint32_t
|
|
pack_aux(uint8_t *src, int src_bytes)
|
|
{
|
|
int i;
|
|
uint32_t v = 0;
|
|
|
|
if (src_bytes > 4)
|
|
src_bytes = 4;
|
|
for (i = 0; i < src_bytes; i++)
|
|
v |= ((uint32_t) src[i]) << ((3-i) * 8);
|
|
return v;
|
|
}
|
|
|
|
static void
|
|
unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes)
|
|
{
|
|
int i;
|
|
if (dst_bytes > 4)
|
|
dst_bytes = 4;
|
|
for (i = 0; i < dst_bytes; i++)
|
|
dst[i] = src >> ((3-i) * 8);
|
|
}
|
|
|
|
static int
|
|
cdv_intel_dp_aux_ch(struct gma_encoder *encoder,
|
|
uint8_t *send, int send_bytes,
|
|
uint8_t *recv, int recv_size)
|
|
{
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
uint32_t output_reg = intel_dp->output_reg;
|
|
struct drm_device *dev = encoder->base.dev;
|
|
uint32_t ch_ctl = output_reg + 0x10;
|
|
uint32_t ch_data = ch_ctl + 4;
|
|
int i;
|
|
int recv_bytes;
|
|
uint32_t status;
|
|
uint32_t aux_clock_divider;
|
|
int try, precharge;
|
|
|
|
/* The clock divider is based off the hrawclk,
|
|
* and would like to run at 2MHz. So, take the
|
|
* hrawclk value and divide by 2 and use that
|
|
* On CDV platform it uses 200MHz as hrawclk.
|
|
*
|
|
*/
|
|
aux_clock_divider = 200 / 2;
|
|
|
|
precharge = 4;
|
|
if (is_edp(encoder))
|
|
precharge = 10;
|
|
|
|
if (REG_READ(ch_ctl) & DP_AUX_CH_CTL_SEND_BUSY) {
|
|
DRM_ERROR("dp_aux_ch not started status 0x%08x\n",
|
|
REG_READ(ch_ctl));
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* Must try at least 3 times according to DP spec */
|
|
for (try = 0; try < 5; try++) {
|
|
/* Load the send data into the aux channel data registers */
|
|
for (i = 0; i < send_bytes; i += 4)
|
|
REG_WRITE(ch_data + i,
|
|
pack_aux(send + i, send_bytes - i));
|
|
|
|
/* Send the command and wait for it to complete */
|
|
REG_WRITE(ch_ctl,
|
|
DP_AUX_CH_CTL_SEND_BUSY |
|
|
DP_AUX_CH_CTL_TIME_OUT_400us |
|
|
(send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
|
|
(precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
|
|
(aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) |
|
|
DP_AUX_CH_CTL_DONE |
|
|
DP_AUX_CH_CTL_TIME_OUT_ERROR |
|
|
DP_AUX_CH_CTL_RECEIVE_ERROR);
|
|
for (;;) {
|
|
status = REG_READ(ch_ctl);
|
|
if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
|
|
break;
|
|
udelay(100);
|
|
}
|
|
|
|
/* Clear done status and any errors */
|
|
REG_WRITE(ch_ctl,
|
|
status |
|
|
DP_AUX_CH_CTL_DONE |
|
|
DP_AUX_CH_CTL_TIME_OUT_ERROR |
|
|
DP_AUX_CH_CTL_RECEIVE_ERROR);
|
|
if (status & DP_AUX_CH_CTL_DONE)
|
|
break;
|
|
}
|
|
|
|
if ((status & DP_AUX_CH_CTL_DONE) == 0) {
|
|
DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* Check for timeout or receive error.
|
|
* Timeouts occur when the sink is not connected
|
|
*/
|
|
if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
|
|
DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
|
|
return -EIO;
|
|
}
|
|
|
|
/* Timeouts occur when the device isn't connected, so they're
|
|
* "normal" -- don't fill the kernel log with these */
|
|
if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
|
|
DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* Unload any bytes sent back from the other side */
|
|
recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >>
|
|
DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
|
|
if (recv_bytes > recv_size)
|
|
recv_bytes = recv_size;
|
|
|
|
for (i = 0; i < recv_bytes; i += 4)
|
|
unpack_aux(REG_READ(ch_data + i),
|
|
recv + i, recv_bytes - i);
|
|
|
|
return recv_bytes;
|
|
}
|
|
|
|
/* Write data to the aux channel in native mode */
|
|
static int
|
|
cdv_intel_dp_aux_native_write(struct gma_encoder *encoder,
|
|
uint16_t address, uint8_t *send, int send_bytes)
|
|
{
|
|
int ret;
|
|
uint8_t msg[20];
|
|
int msg_bytes;
|
|
uint8_t ack;
|
|
|
|
if (send_bytes > 16)
|
|
return -1;
|
|
msg[0] = DP_AUX_NATIVE_WRITE << 4;
|
|
msg[1] = address >> 8;
|
|
msg[2] = address & 0xff;
|
|
msg[3] = send_bytes - 1;
|
|
memcpy(&msg[4], send, send_bytes);
|
|
msg_bytes = send_bytes + 4;
|
|
for (;;) {
|
|
ret = cdv_intel_dp_aux_ch(encoder, msg, msg_bytes, &ack, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
ack >>= 4;
|
|
if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK)
|
|
break;
|
|
else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER)
|
|
udelay(100);
|
|
else
|
|
return -EIO;
|
|
}
|
|
return send_bytes;
|
|
}
|
|
|
|
/* Write a single byte to the aux channel in native mode */
|
|
static int
|
|
cdv_intel_dp_aux_native_write_1(struct gma_encoder *encoder,
|
|
uint16_t address, uint8_t byte)
|
|
{
|
|
return cdv_intel_dp_aux_native_write(encoder, address, &byte, 1);
|
|
}
|
|
|
|
/* read bytes from a native aux channel */
|
|
static int
|
|
cdv_intel_dp_aux_native_read(struct gma_encoder *encoder,
|
|
uint16_t address, uint8_t *recv, int recv_bytes)
|
|
{
|
|
uint8_t msg[4];
|
|
int msg_bytes;
|
|
uint8_t reply[20];
|
|
int reply_bytes;
|
|
uint8_t ack;
|
|
int ret;
|
|
|
|
msg[0] = DP_AUX_NATIVE_READ << 4;
|
|
msg[1] = address >> 8;
|
|
msg[2] = address & 0xff;
|
|
msg[3] = recv_bytes - 1;
|
|
|
|
msg_bytes = 4;
|
|
reply_bytes = recv_bytes + 1;
|
|
|
|
for (;;) {
|
|
ret = cdv_intel_dp_aux_ch(encoder, msg, msg_bytes,
|
|
reply, reply_bytes);
|
|
if (ret == 0)
|
|
return -EPROTO;
|
|
if (ret < 0)
|
|
return ret;
|
|
ack = reply[0] >> 4;
|
|
if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_ACK) {
|
|
memcpy(recv, reply + 1, ret - 1);
|
|
return ret - 1;
|
|
}
|
|
else if ((ack & DP_AUX_NATIVE_REPLY_MASK) == DP_AUX_NATIVE_REPLY_DEFER)
|
|
udelay(100);
|
|
else
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
static int
|
|
cdv_intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
|
|
uint8_t write_byte, uint8_t *read_byte)
|
|
{
|
|
struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
|
|
struct cdv_intel_dp *intel_dp = container_of(adapter,
|
|
struct cdv_intel_dp,
|
|
adapter);
|
|
struct gma_encoder *encoder = intel_dp->encoder;
|
|
uint16_t address = algo_data->address;
|
|
uint8_t msg[5];
|
|
uint8_t reply[2];
|
|
unsigned retry;
|
|
int msg_bytes;
|
|
int reply_bytes;
|
|
int ret;
|
|
|
|
/* Set up the command byte */
|
|
if (mode & MODE_I2C_READ)
|
|
msg[0] = DP_AUX_I2C_READ << 4;
|
|
else
|
|
msg[0] = DP_AUX_I2C_WRITE << 4;
|
|
|
|
if (!(mode & MODE_I2C_STOP))
|
|
msg[0] |= DP_AUX_I2C_MOT << 4;
|
|
|
|
msg[1] = address >> 8;
|
|
msg[2] = address;
|
|
|
|
switch (mode) {
|
|
case MODE_I2C_WRITE:
|
|
msg[3] = 0;
|
|
msg[4] = write_byte;
|
|
msg_bytes = 5;
|
|
reply_bytes = 1;
|
|
break;
|
|
case MODE_I2C_READ:
|
|
msg[3] = 0;
|
|
msg_bytes = 4;
|
|
reply_bytes = 2;
|
|
break;
|
|
default:
|
|
msg_bytes = 3;
|
|
reply_bytes = 1;
|
|
break;
|
|
}
|
|
|
|
for (retry = 0; retry < 5; retry++) {
|
|
ret = cdv_intel_dp_aux_ch(encoder,
|
|
msg, msg_bytes,
|
|
reply, reply_bytes);
|
|
if (ret < 0) {
|
|
DRM_DEBUG_KMS("aux_ch failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
switch ((reply[0] >> 4) & DP_AUX_NATIVE_REPLY_MASK) {
|
|
case DP_AUX_NATIVE_REPLY_ACK:
|
|
/* I2C-over-AUX Reply field is only valid
|
|
* when paired with AUX ACK.
|
|
*/
|
|
break;
|
|
case DP_AUX_NATIVE_REPLY_NACK:
|
|
DRM_DEBUG_KMS("aux_ch native nack\n");
|
|
return -EREMOTEIO;
|
|
case DP_AUX_NATIVE_REPLY_DEFER:
|
|
udelay(100);
|
|
continue;
|
|
default:
|
|
DRM_ERROR("aux_ch invalid native reply 0x%02x\n",
|
|
reply[0]);
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
switch ((reply[0] >> 4) & DP_AUX_I2C_REPLY_MASK) {
|
|
case DP_AUX_I2C_REPLY_ACK:
|
|
if (mode == MODE_I2C_READ) {
|
|
*read_byte = reply[1];
|
|
}
|
|
return reply_bytes - 1;
|
|
case DP_AUX_I2C_REPLY_NACK:
|
|
DRM_DEBUG_KMS("aux_i2c nack\n");
|
|
return -EREMOTEIO;
|
|
case DP_AUX_I2C_REPLY_DEFER:
|
|
DRM_DEBUG_KMS("aux_i2c defer\n");
|
|
udelay(100);
|
|
break;
|
|
default:
|
|
DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]);
|
|
return -EREMOTEIO;
|
|
}
|
|
}
|
|
|
|
DRM_ERROR("too many retries, giving up\n");
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
static int
|
|
cdv_intel_dp_i2c_init(struct gma_connector *connector,
|
|
struct gma_encoder *encoder, const char *name)
|
|
{
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
int ret;
|
|
|
|
DRM_DEBUG_KMS("i2c_init %s\n", name);
|
|
|
|
intel_dp->algo.running = false;
|
|
intel_dp->algo.address = 0;
|
|
intel_dp->algo.aux_ch = cdv_intel_dp_i2c_aux_ch;
|
|
|
|
memset(&intel_dp->adapter, '\0', sizeof (intel_dp->adapter));
|
|
intel_dp->adapter.owner = THIS_MODULE;
|
|
intel_dp->adapter.class = I2C_CLASS_DDC;
|
|
strncpy (intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1);
|
|
intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0';
|
|
intel_dp->adapter.algo_data = &intel_dp->algo;
|
|
intel_dp->adapter.dev.parent = connector->base.kdev;
|
|
|
|
if (is_edp(encoder))
|
|
cdv_intel_edp_panel_vdd_on(encoder);
|
|
ret = i2c_dp_aux_add_bus(&intel_dp->adapter);
|
|
if (is_edp(encoder))
|
|
cdv_intel_edp_panel_vdd_off(encoder);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void cdv_intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
adjusted_mode->hdisplay = fixed_mode->hdisplay;
|
|
adjusted_mode->hsync_start = fixed_mode->hsync_start;
|
|
adjusted_mode->hsync_end = fixed_mode->hsync_end;
|
|
adjusted_mode->htotal = fixed_mode->htotal;
|
|
|
|
adjusted_mode->vdisplay = fixed_mode->vdisplay;
|
|
adjusted_mode->vsync_start = fixed_mode->vsync_start;
|
|
adjusted_mode->vsync_end = fixed_mode->vsync_end;
|
|
adjusted_mode->vtotal = fixed_mode->vtotal;
|
|
|
|
adjusted_mode->clock = fixed_mode->clock;
|
|
|
|
drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
|
|
}
|
|
|
|
static bool
|
|
cdv_intel_dp_mode_fixup(struct drm_encoder *encoder, const struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
struct drm_psb_private *dev_priv = encoder->dev->dev_private;
|
|
struct gma_encoder *intel_encoder = to_gma_encoder(encoder);
|
|
struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv;
|
|
int lane_count, clock;
|
|
int max_lane_count = cdv_intel_dp_max_lane_count(intel_encoder);
|
|
int max_clock = cdv_intel_dp_max_link_bw(intel_encoder) == DP_LINK_BW_2_7 ? 1 : 0;
|
|
static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 };
|
|
int refclock = mode->clock;
|
|
int bpp = 24;
|
|
|
|
if (is_edp(intel_encoder) && intel_dp->panel_fixed_mode) {
|
|
cdv_intel_fixed_panel_mode(intel_dp->panel_fixed_mode, adjusted_mode);
|
|
refclock = intel_dp->panel_fixed_mode->clock;
|
|
bpp = dev_priv->edp.bpp;
|
|
}
|
|
|
|
for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) {
|
|
for (clock = max_clock; clock >= 0; clock--) {
|
|
int link_avail = cdv_intel_dp_max_data_rate(cdv_intel_dp_link_clock(bws[clock]), lane_count);
|
|
|
|
if (cdv_intel_dp_link_required(refclock, bpp) <= link_avail) {
|
|
intel_dp->link_bw = bws[clock];
|
|
intel_dp->lane_count = lane_count;
|
|
adjusted_mode->clock = cdv_intel_dp_link_clock(intel_dp->link_bw);
|
|
DRM_DEBUG_KMS("Display port link bw %02x lane "
|
|
"count %d clock %d\n",
|
|
intel_dp->link_bw, intel_dp->lane_count,
|
|
adjusted_mode->clock);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
if (is_edp(intel_encoder)) {
|
|
/* okay we failed just pick the highest */
|
|
intel_dp->lane_count = max_lane_count;
|
|
intel_dp->link_bw = bws[max_clock];
|
|
adjusted_mode->clock = cdv_intel_dp_link_clock(intel_dp->link_bw);
|
|
DRM_DEBUG_KMS("Force picking display port link bw %02x lane "
|
|
"count %d clock %d\n",
|
|
intel_dp->link_bw, intel_dp->lane_count,
|
|
adjusted_mode->clock);
|
|
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
struct cdv_intel_dp_m_n {
|
|
uint32_t tu;
|
|
uint32_t gmch_m;
|
|
uint32_t gmch_n;
|
|
uint32_t link_m;
|
|
uint32_t link_n;
|
|
};
|
|
|
|
static void
|
|
cdv_intel_reduce_ratio(uint32_t *num, uint32_t *den)
|
|
{
|
|
/*
|
|
while (*num > 0xffffff || *den > 0xffffff) {
|
|
*num >>= 1;
|
|
*den >>= 1;
|
|
}*/
|
|
uint64_t value, m;
|
|
m = *num;
|
|
value = m * (0x800000);
|
|
m = do_div(value, *den);
|
|
*num = value;
|
|
*den = 0x800000;
|
|
}
|
|
|
|
static void
|
|
cdv_intel_dp_compute_m_n(int bpp,
|
|
int nlanes,
|
|
int pixel_clock,
|
|
int link_clock,
|
|
struct cdv_intel_dp_m_n *m_n)
|
|
{
|
|
m_n->tu = 64;
|
|
m_n->gmch_m = (pixel_clock * bpp + 7) >> 3;
|
|
m_n->gmch_n = link_clock * nlanes;
|
|
cdv_intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
|
|
m_n->link_m = pixel_clock;
|
|
m_n->link_n = link_clock;
|
|
cdv_intel_reduce_ratio(&m_n->link_m, &m_n->link_n);
|
|
}
|
|
|
|
void
|
|
cdv_intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
struct drm_device *dev = crtc->dev;
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
|
struct drm_mode_config *mode_config = &dev->mode_config;
|
|
struct drm_encoder *encoder;
|
|
struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
|
|
int lane_count = 4, bpp = 24;
|
|
struct cdv_intel_dp_m_n m_n;
|
|
int pipe = gma_crtc->pipe;
|
|
|
|
/*
|
|
* Find the lane count in the intel_encoder private
|
|
*/
|
|
list_for_each_entry(encoder, &mode_config->encoder_list, head) {
|
|
struct gma_encoder *intel_encoder;
|
|
struct cdv_intel_dp *intel_dp;
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
|
|
intel_encoder = to_gma_encoder(encoder);
|
|
intel_dp = intel_encoder->dev_priv;
|
|
if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT) {
|
|
lane_count = intel_dp->lane_count;
|
|
break;
|
|
} else if (is_edp(intel_encoder)) {
|
|
lane_count = intel_dp->lane_count;
|
|
bpp = dev_priv->edp.bpp;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Compute the GMCH and Link ratios. The '3' here is
|
|
* the number of bytes_per_pixel post-LUT, which we always
|
|
* set up for 8-bits of R/G/B, or 3 bytes total.
|
|
*/
|
|
cdv_intel_dp_compute_m_n(bpp, lane_count,
|
|
mode->clock, adjusted_mode->clock, &m_n);
|
|
|
|
{
|
|
REG_WRITE(PIPE_GMCH_DATA_M(pipe),
|
|
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
|
|
m_n.gmch_m);
|
|
REG_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n);
|
|
REG_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m);
|
|
REG_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n);
|
|
}
|
|
}
|
|
|
|
static void
|
|
cdv_intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
struct gma_encoder *intel_encoder = to_gma_encoder(encoder);
|
|
struct drm_crtc *crtc = encoder->crtc;
|
|
struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
|
|
struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv;
|
|
struct drm_device *dev = encoder->dev;
|
|
|
|
intel_dp->DP = DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
|
|
intel_dp->DP |= intel_dp->color_range;
|
|
|
|
if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
|
|
intel_dp->DP |= DP_SYNC_HS_HIGH;
|
|
if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
|
|
intel_dp->DP |= DP_SYNC_VS_HIGH;
|
|
|
|
intel_dp->DP |= DP_LINK_TRAIN_OFF;
|
|
|
|
switch (intel_dp->lane_count) {
|
|
case 1:
|
|
intel_dp->DP |= DP_PORT_WIDTH_1;
|
|
break;
|
|
case 2:
|
|
intel_dp->DP |= DP_PORT_WIDTH_2;
|
|
break;
|
|
case 4:
|
|
intel_dp->DP |= DP_PORT_WIDTH_4;
|
|
break;
|
|
}
|
|
if (intel_dp->has_audio)
|
|
intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
|
|
|
|
memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE);
|
|
intel_dp->link_configuration[0] = intel_dp->link_bw;
|
|
intel_dp->link_configuration[1] = intel_dp->lane_count;
|
|
|
|
/*
|
|
* Check for DPCD version > 1.1 and enhanced framing support
|
|
*/
|
|
if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
|
|
(intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) {
|
|
intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
|
|
intel_dp->DP |= DP_ENHANCED_FRAMING;
|
|
}
|
|
|
|
/* CPT DP's pipe select is decided in TRANS_DP_CTL */
|
|
if (gma_crtc->pipe == 1)
|
|
intel_dp->DP |= DP_PIPEB_SELECT;
|
|
|
|
REG_WRITE(intel_dp->output_reg, (intel_dp->DP | DP_PORT_EN));
|
|
DRM_DEBUG_KMS("DP expected reg is %x\n", intel_dp->DP);
|
|
if (is_edp(intel_encoder)) {
|
|
uint32_t pfit_control;
|
|
cdv_intel_edp_panel_on(intel_encoder);
|
|
|
|
if (mode->hdisplay != adjusted_mode->hdisplay ||
|
|
mode->vdisplay != adjusted_mode->vdisplay)
|
|
pfit_control = PFIT_ENABLE;
|
|
else
|
|
pfit_control = 0;
|
|
|
|
pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT;
|
|
|
|
REG_WRITE(PFIT_CONTROL, pfit_control);
|
|
}
|
|
}
|
|
|
|
|
|
/* If the sink supports it, try to set the power state appropriately */
|
|
static void cdv_intel_dp_sink_dpms(struct gma_encoder *encoder, int mode)
|
|
{
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
int ret, i;
|
|
|
|
/* Should have a valid DPCD by this point */
|
|
if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
|
|
return;
|
|
|
|
if (mode != DRM_MODE_DPMS_ON) {
|
|
ret = cdv_intel_dp_aux_native_write_1(encoder, DP_SET_POWER,
|
|
DP_SET_POWER_D3);
|
|
if (ret != 1)
|
|
DRM_DEBUG_DRIVER("failed to write sink power state\n");
|
|
} else {
|
|
/*
|
|
* When turning on, we need to retry for 1ms to give the sink
|
|
* time to wake up.
|
|
*/
|
|
for (i = 0; i < 3; i++) {
|
|
ret = cdv_intel_dp_aux_native_write_1(encoder,
|
|
DP_SET_POWER,
|
|
DP_SET_POWER_D0);
|
|
if (ret == 1)
|
|
break;
|
|
udelay(1000);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void cdv_intel_dp_prepare(struct drm_encoder *encoder)
|
|
{
|
|
struct gma_encoder *intel_encoder = to_gma_encoder(encoder);
|
|
int edp = is_edp(intel_encoder);
|
|
|
|
if (edp) {
|
|
cdv_intel_edp_backlight_off(intel_encoder);
|
|
cdv_intel_edp_panel_off(intel_encoder);
|
|
cdv_intel_edp_panel_vdd_on(intel_encoder);
|
|
}
|
|
/* Wake up the sink first */
|
|
cdv_intel_dp_sink_dpms(intel_encoder, DRM_MODE_DPMS_ON);
|
|
cdv_intel_dp_link_down(intel_encoder);
|
|
if (edp)
|
|
cdv_intel_edp_panel_vdd_off(intel_encoder);
|
|
}
|
|
|
|
static void cdv_intel_dp_commit(struct drm_encoder *encoder)
|
|
{
|
|
struct gma_encoder *intel_encoder = to_gma_encoder(encoder);
|
|
int edp = is_edp(intel_encoder);
|
|
|
|
if (edp)
|
|
cdv_intel_edp_panel_on(intel_encoder);
|
|
cdv_intel_dp_start_link_train(intel_encoder);
|
|
cdv_intel_dp_complete_link_train(intel_encoder);
|
|
if (edp)
|
|
cdv_intel_edp_backlight_on(intel_encoder);
|
|
}
|
|
|
|
static void
|
|
cdv_intel_dp_dpms(struct drm_encoder *encoder, int mode)
|
|
{
|
|
struct gma_encoder *intel_encoder = to_gma_encoder(encoder);
|
|
struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv;
|
|
struct drm_device *dev = encoder->dev;
|
|
uint32_t dp_reg = REG_READ(intel_dp->output_reg);
|
|
int edp = is_edp(intel_encoder);
|
|
|
|
if (mode != DRM_MODE_DPMS_ON) {
|
|
if (edp) {
|
|
cdv_intel_edp_backlight_off(intel_encoder);
|
|
cdv_intel_edp_panel_vdd_on(intel_encoder);
|
|
}
|
|
cdv_intel_dp_sink_dpms(intel_encoder, mode);
|
|
cdv_intel_dp_link_down(intel_encoder);
|
|
if (edp) {
|
|
cdv_intel_edp_panel_vdd_off(intel_encoder);
|
|
cdv_intel_edp_panel_off(intel_encoder);
|
|
}
|
|
} else {
|
|
if (edp)
|
|
cdv_intel_edp_panel_on(intel_encoder);
|
|
cdv_intel_dp_sink_dpms(intel_encoder, mode);
|
|
if (!(dp_reg & DP_PORT_EN)) {
|
|
cdv_intel_dp_start_link_train(intel_encoder);
|
|
cdv_intel_dp_complete_link_train(intel_encoder);
|
|
}
|
|
if (edp)
|
|
cdv_intel_edp_backlight_on(intel_encoder);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Native read with retry for link status and receiver capability reads for
|
|
* cases where the sink may still be asleep.
|
|
*/
|
|
static bool
|
|
cdv_intel_dp_aux_native_read_retry(struct gma_encoder *encoder, uint16_t address,
|
|
uint8_t *recv, int recv_bytes)
|
|
{
|
|
int ret, i;
|
|
|
|
/*
|
|
* Sinks are *supposed* to come up within 1ms from an off state,
|
|
* but we're also supposed to retry 3 times per the spec.
|
|
*/
|
|
for (i = 0; i < 3; i++) {
|
|
ret = cdv_intel_dp_aux_native_read(encoder, address, recv,
|
|
recv_bytes);
|
|
if (ret == recv_bytes)
|
|
return true;
|
|
udelay(1000);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Fetch AUX CH registers 0x202 - 0x207 which contain
|
|
* link status information
|
|
*/
|
|
static bool
|
|
cdv_intel_dp_get_link_status(struct gma_encoder *encoder)
|
|
{
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
return cdv_intel_dp_aux_native_read_retry(encoder,
|
|
DP_LANE0_1_STATUS,
|
|
intel_dp->link_status,
|
|
DP_LINK_STATUS_SIZE);
|
|
}
|
|
|
|
static uint8_t
|
|
cdv_intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE],
|
|
int r)
|
|
{
|
|
return link_status[r - DP_LANE0_1_STATUS];
|
|
}
|
|
|
|
static uint8_t
|
|
cdv_intel_get_adjust_request_voltage(uint8_t link_status[DP_LINK_STATUS_SIZE],
|
|
int lane)
|
|
{
|
|
int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1);
|
|
int s = ((lane & 1) ?
|
|
DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT :
|
|
DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT);
|
|
uint8_t l = cdv_intel_dp_link_status(link_status, i);
|
|
|
|
return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT;
|
|
}
|
|
|
|
static uint8_t
|
|
cdv_intel_get_adjust_request_pre_emphasis(uint8_t link_status[DP_LINK_STATUS_SIZE],
|
|
int lane)
|
|
{
|
|
int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1);
|
|
int s = ((lane & 1) ?
|
|
DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT :
|
|
DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT);
|
|
uint8_t l = cdv_intel_dp_link_status(link_status, i);
|
|
|
|
return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT;
|
|
}
|
|
|
|
|
|
#if 0
|
|
static char *voltage_names[] = {
|
|
"0.4V", "0.6V", "0.8V", "1.2V"
|
|
};
|
|
static char *pre_emph_names[] = {
|
|
"0dB", "3.5dB", "6dB", "9.5dB"
|
|
};
|
|
static char *link_train_names[] = {
|
|
"pattern 1", "pattern 2", "idle", "off"
|
|
};
|
|
#endif
|
|
|
|
#define CDV_DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_LEVEL_3
|
|
/*
|
|
static uint8_t
|
|
cdv_intel_dp_pre_emphasis_max(uint8_t voltage_swing)
|
|
{
|
|
switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_400:
|
|
return DP_TRAIN_PRE_EMPHASIS_6;
|
|
case DP_TRAIN_VOLTAGE_SWING_600:
|
|
return DP_TRAIN_PRE_EMPHASIS_6;
|
|
case DP_TRAIN_VOLTAGE_SWING_800:
|
|
return DP_TRAIN_PRE_EMPHASIS_3_5;
|
|
case DP_TRAIN_VOLTAGE_SWING_1200:
|
|
default:
|
|
return DP_TRAIN_PRE_EMPHASIS_0;
|
|
}
|
|
}
|
|
*/
|
|
static void
|
|
cdv_intel_get_adjust_train(struct gma_encoder *encoder)
|
|
{
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
uint8_t v = 0;
|
|
uint8_t p = 0;
|
|
int lane;
|
|
|
|
for (lane = 0; lane < intel_dp->lane_count; lane++) {
|
|
uint8_t this_v = cdv_intel_get_adjust_request_voltage(intel_dp->link_status, lane);
|
|
uint8_t this_p = cdv_intel_get_adjust_request_pre_emphasis(intel_dp->link_status, lane);
|
|
|
|
if (this_v > v)
|
|
v = this_v;
|
|
if (this_p > p)
|
|
p = this_p;
|
|
}
|
|
|
|
if (v >= CDV_DP_VOLTAGE_MAX)
|
|
v = CDV_DP_VOLTAGE_MAX | DP_TRAIN_MAX_SWING_REACHED;
|
|
|
|
if (p == DP_TRAIN_PRE_EMPHASIS_MASK)
|
|
p |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
|
|
|
|
for (lane = 0; lane < 4; lane++)
|
|
intel_dp->train_set[lane] = v | p;
|
|
}
|
|
|
|
|
|
static uint8_t
|
|
cdv_intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE],
|
|
int lane)
|
|
{
|
|
int i = DP_LANE0_1_STATUS + (lane >> 1);
|
|
int s = (lane & 1) * 4;
|
|
uint8_t l = cdv_intel_dp_link_status(link_status, i);
|
|
|
|
return (l >> s) & 0xf;
|
|
}
|
|
|
|
/* Check for clock recovery is done on all channels */
|
|
static bool
|
|
cdv_intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count)
|
|
{
|
|
int lane;
|
|
uint8_t lane_status;
|
|
|
|
for (lane = 0; lane < lane_count; lane++) {
|
|
lane_status = cdv_intel_get_lane_status(link_status, lane);
|
|
if ((lane_status & DP_LANE_CR_DONE) == 0)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/* Check to see if channel eq is done on all channels */
|
|
#define CHANNEL_EQ_BITS (DP_LANE_CR_DONE|\
|
|
DP_LANE_CHANNEL_EQ_DONE|\
|
|
DP_LANE_SYMBOL_LOCKED)
|
|
static bool
|
|
cdv_intel_channel_eq_ok(struct gma_encoder *encoder)
|
|
{
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
uint8_t lane_align;
|
|
uint8_t lane_status;
|
|
int lane;
|
|
|
|
lane_align = cdv_intel_dp_link_status(intel_dp->link_status,
|
|
DP_LANE_ALIGN_STATUS_UPDATED);
|
|
if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0)
|
|
return false;
|
|
for (lane = 0; lane < intel_dp->lane_count; lane++) {
|
|
lane_status = cdv_intel_get_lane_status(intel_dp->link_status, lane);
|
|
if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
cdv_intel_dp_set_link_train(struct gma_encoder *encoder,
|
|
uint32_t dp_reg_value,
|
|
uint8_t dp_train_pat)
|
|
{
|
|
|
|
struct drm_device *dev = encoder->base.dev;
|
|
int ret;
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
|
|
REG_WRITE(intel_dp->output_reg, dp_reg_value);
|
|
REG_READ(intel_dp->output_reg);
|
|
|
|
ret = cdv_intel_dp_aux_native_write_1(encoder,
|
|
DP_TRAINING_PATTERN_SET,
|
|
dp_train_pat);
|
|
|
|
if (ret != 1) {
|
|
DRM_DEBUG_KMS("Failure in setting link pattern %x\n",
|
|
dp_train_pat);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
static bool
|
|
cdv_intel_dplink_set_level(struct gma_encoder *encoder,
|
|
uint8_t dp_train_pat)
|
|
{
|
|
|
|
int ret;
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
|
|
ret = cdv_intel_dp_aux_native_write(encoder,
|
|
DP_TRAINING_LANE0_SET,
|
|
intel_dp->train_set,
|
|
intel_dp->lane_count);
|
|
|
|
if (ret != intel_dp->lane_count) {
|
|
DRM_DEBUG_KMS("Failure in setting level %d, lane_cnt= %d\n",
|
|
intel_dp->train_set[0], intel_dp->lane_count);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
cdv_intel_dp_set_vswing_premph(struct gma_encoder *encoder, uint8_t signal_level)
|
|
{
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
struct ddi_regoff *ddi_reg;
|
|
int vswing, premph, index;
|
|
|
|
if (intel_dp->output_reg == DP_B)
|
|
ddi_reg = &ddi_DP_train_table[0];
|
|
else
|
|
ddi_reg = &ddi_DP_train_table[1];
|
|
|
|
vswing = (signal_level & DP_TRAIN_VOLTAGE_SWING_MASK);
|
|
premph = ((signal_level & DP_TRAIN_PRE_EMPHASIS_MASK)) >>
|
|
DP_TRAIN_PRE_EMPHASIS_SHIFT;
|
|
|
|
if (vswing + premph > 3)
|
|
return;
|
|
#ifdef CDV_FAST_LINK_TRAIN
|
|
return;
|
|
#endif
|
|
DRM_DEBUG_KMS("Test2\n");
|
|
//return ;
|
|
cdv_sb_reset(dev);
|
|
/* ;Swing voltage programming
|
|
;gfx_dpio_set_reg(0xc058, 0x0505313A) */
|
|
cdv_sb_write(dev, ddi_reg->VSwing5, 0x0505313A);
|
|
|
|
/* ;gfx_dpio_set_reg(0x8154, 0x43406055) */
|
|
cdv_sb_write(dev, ddi_reg->VSwing1, 0x43406055);
|
|
|
|
/* ;gfx_dpio_set_reg(0x8148, 0x55338954)
|
|
* The VSwing_PreEmph table is also considered based on the vswing/premp
|
|
*/
|
|
index = (vswing + premph) * 2;
|
|
if (premph == 1 && vswing == 1) {
|
|
cdv_sb_write(dev, ddi_reg->VSwing2, 0x055738954);
|
|
} else
|
|
cdv_sb_write(dev, ddi_reg->VSwing2, dp_vswing_premph_table[index]);
|
|
|
|
/* ;gfx_dpio_set_reg(0x814c, 0x40802040) */
|
|
if ((vswing + premph) == DP_TRAIN_VOLTAGE_SWING_LEVEL_3)
|
|
cdv_sb_write(dev, ddi_reg->VSwing3, 0x70802040);
|
|
else
|
|
cdv_sb_write(dev, ddi_reg->VSwing3, 0x40802040);
|
|
|
|
/* ;gfx_dpio_set_reg(0x8150, 0x2b405555) */
|
|
/* cdv_sb_write(dev, ddi_reg->VSwing4, 0x2b405555); */
|
|
|
|
/* ;gfx_dpio_set_reg(0x8154, 0xc3406055) */
|
|
cdv_sb_write(dev, ddi_reg->VSwing1, 0xc3406055);
|
|
|
|
/* ;Pre emphasis programming
|
|
* ;gfx_dpio_set_reg(0xc02c, 0x1f030040)
|
|
*/
|
|
cdv_sb_write(dev, ddi_reg->PreEmph1, 0x1f030040);
|
|
|
|
/* ;gfx_dpio_set_reg(0x8124, 0x00004000) */
|
|
index = 2 * premph + 1;
|
|
cdv_sb_write(dev, ddi_reg->PreEmph2, dp_vswing_premph_table[index]);
|
|
return;
|
|
}
|
|
|
|
|
|
/* Enable corresponding port and start training pattern 1 */
|
|
static void
|
|
cdv_intel_dp_start_link_train(struct gma_encoder *encoder)
|
|
{
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
int i;
|
|
uint8_t voltage;
|
|
bool clock_recovery = false;
|
|
int tries;
|
|
u32 reg;
|
|
uint32_t DP = intel_dp->DP;
|
|
|
|
DP |= DP_PORT_EN;
|
|
DP &= ~DP_LINK_TRAIN_MASK;
|
|
|
|
reg = DP;
|
|
reg |= DP_LINK_TRAIN_PAT_1;
|
|
/* Enable output, wait for it to become active */
|
|
REG_WRITE(intel_dp->output_reg, reg);
|
|
REG_READ(intel_dp->output_reg);
|
|
gma_wait_for_vblank(dev);
|
|
|
|
DRM_DEBUG_KMS("Link config\n");
|
|
/* Write the link configuration data */
|
|
cdv_intel_dp_aux_native_write(encoder, DP_LINK_BW_SET,
|
|
intel_dp->link_configuration,
|
|
2);
|
|
|
|
memset(intel_dp->train_set, 0, 4);
|
|
voltage = 0;
|
|
tries = 0;
|
|
clock_recovery = false;
|
|
|
|
DRM_DEBUG_KMS("Start train\n");
|
|
reg = DP | DP_LINK_TRAIN_PAT_1;
|
|
|
|
|
|
for (;;) {
|
|
/* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
|
|
DRM_DEBUG_KMS("DP Link Train Set %x, Link_config %x, %x\n",
|
|
intel_dp->train_set[0],
|
|
intel_dp->link_configuration[0],
|
|
intel_dp->link_configuration[1]);
|
|
|
|
if (!cdv_intel_dp_set_link_train(encoder, reg, DP_TRAINING_PATTERN_1)) {
|
|
DRM_DEBUG_KMS("Failure in aux-transfer setting pattern 1\n");
|
|
}
|
|
cdv_intel_dp_set_vswing_premph(encoder, intel_dp->train_set[0]);
|
|
/* Set training pattern 1 */
|
|
|
|
cdv_intel_dplink_set_level(encoder, DP_TRAINING_PATTERN_1);
|
|
|
|
udelay(200);
|
|
if (!cdv_intel_dp_get_link_status(encoder))
|
|
break;
|
|
|
|
DRM_DEBUG_KMS("DP Link status %x, %x, %x, %x, %x, %x\n",
|
|
intel_dp->link_status[0], intel_dp->link_status[1], intel_dp->link_status[2],
|
|
intel_dp->link_status[3], intel_dp->link_status[4], intel_dp->link_status[5]);
|
|
|
|
if (cdv_intel_clock_recovery_ok(intel_dp->link_status, intel_dp->lane_count)) {
|
|
DRM_DEBUG_KMS("PT1 train is done\n");
|
|
clock_recovery = true;
|
|
break;
|
|
}
|
|
|
|
/* Check to see if we've tried the max voltage */
|
|
for (i = 0; i < intel_dp->lane_count; i++)
|
|
if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0)
|
|
break;
|
|
if (i == intel_dp->lane_count)
|
|
break;
|
|
|
|
/* Check to see if we've tried the same voltage 5 times */
|
|
if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
|
|
++tries;
|
|
if (tries == 5)
|
|
break;
|
|
} else
|
|
tries = 0;
|
|
voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
|
|
|
|
/* Compute new intel_dp->train_set as requested by target */
|
|
cdv_intel_get_adjust_train(encoder);
|
|
|
|
}
|
|
|
|
if (!clock_recovery) {
|
|
DRM_DEBUG_KMS("failure in DP patter 1 training, train set %x\n", intel_dp->train_set[0]);
|
|
}
|
|
|
|
intel_dp->DP = DP;
|
|
}
|
|
|
|
static void
|
|
cdv_intel_dp_complete_link_train(struct gma_encoder *encoder)
|
|
{
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
bool channel_eq = false;
|
|
int tries, cr_tries;
|
|
u32 reg;
|
|
uint32_t DP = intel_dp->DP;
|
|
|
|
/* channel equalization */
|
|
tries = 0;
|
|
cr_tries = 0;
|
|
channel_eq = false;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
reg = DP | DP_LINK_TRAIN_PAT_2;
|
|
|
|
for (;;) {
|
|
|
|
DRM_DEBUG_KMS("DP Link Train Set %x, Link_config %x, %x\n",
|
|
intel_dp->train_set[0],
|
|
intel_dp->link_configuration[0],
|
|
intel_dp->link_configuration[1]);
|
|
/* channel eq pattern */
|
|
|
|
if (!cdv_intel_dp_set_link_train(encoder, reg,
|
|
DP_TRAINING_PATTERN_2)) {
|
|
DRM_DEBUG_KMS("Failure in aux-transfer setting pattern 2\n");
|
|
}
|
|
/* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
|
|
|
|
if (cr_tries > 5) {
|
|
DRM_ERROR("failed to train DP, aborting\n");
|
|
cdv_intel_dp_link_down(encoder);
|
|
break;
|
|
}
|
|
|
|
cdv_intel_dp_set_vswing_premph(encoder, intel_dp->train_set[0]);
|
|
|
|
cdv_intel_dplink_set_level(encoder, DP_TRAINING_PATTERN_2);
|
|
|
|
udelay(1000);
|
|
if (!cdv_intel_dp_get_link_status(encoder))
|
|
break;
|
|
|
|
DRM_DEBUG_KMS("DP Link status %x, %x, %x, %x, %x, %x\n",
|
|
intel_dp->link_status[0], intel_dp->link_status[1], intel_dp->link_status[2],
|
|
intel_dp->link_status[3], intel_dp->link_status[4], intel_dp->link_status[5]);
|
|
|
|
/* Make sure clock is still ok */
|
|
if (!cdv_intel_clock_recovery_ok(intel_dp->link_status, intel_dp->lane_count)) {
|
|
cdv_intel_dp_start_link_train(encoder);
|
|
cr_tries++;
|
|
continue;
|
|
}
|
|
|
|
if (cdv_intel_channel_eq_ok(encoder)) {
|
|
DRM_DEBUG_KMS("PT2 train is done\n");
|
|
channel_eq = true;
|
|
break;
|
|
}
|
|
|
|
/* Try 5 times, then try clock recovery if that fails */
|
|
if (tries > 5) {
|
|
cdv_intel_dp_link_down(encoder);
|
|
cdv_intel_dp_start_link_train(encoder);
|
|
tries = 0;
|
|
cr_tries++;
|
|
continue;
|
|
}
|
|
|
|
/* Compute new intel_dp->train_set as requested by target */
|
|
cdv_intel_get_adjust_train(encoder);
|
|
++tries;
|
|
|
|
}
|
|
|
|
reg = DP | DP_LINK_TRAIN_OFF;
|
|
|
|
REG_WRITE(intel_dp->output_reg, reg);
|
|
REG_READ(intel_dp->output_reg);
|
|
cdv_intel_dp_aux_native_write_1(encoder,
|
|
DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE);
|
|
}
|
|
|
|
static void
|
|
cdv_intel_dp_link_down(struct gma_encoder *encoder)
|
|
{
|
|
struct drm_device *dev = encoder->base.dev;
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
uint32_t DP = intel_dp->DP;
|
|
|
|
if ((REG_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)
|
|
return;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
|
|
{
|
|
DP &= ~DP_LINK_TRAIN_MASK;
|
|
REG_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE);
|
|
}
|
|
REG_READ(intel_dp->output_reg);
|
|
|
|
msleep(17);
|
|
|
|
REG_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
|
|
REG_READ(intel_dp->output_reg);
|
|
}
|
|
|
|
static enum drm_connector_status cdv_dp_detect(struct gma_encoder *encoder)
|
|
{
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
enum drm_connector_status status;
|
|
|
|
status = connector_status_disconnected;
|
|
if (cdv_intel_dp_aux_native_read(encoder, 0x000, intel_dp->dpcd,
|
|
sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd))
|
|
{
|
|
if (intel_dp->dpcd[DP_DPCD_REV] != 0)
|
|
status = connector_status_connected;
|
|
}
|
|
if (status == connector_status_connected)
|
|
DRM_DEBUG_KMS("DPCD: Rev=%x LN_Rate=%x LN_CNT=%x LN_DOWNSP=%x\n",
|
|
intel_dp->dpcd[0], intel_dp->dpcd[1],
|
|
intel_dp->dpcd[2], intel_dp->dpcd[3]);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection.
|
|
*
|
|
* \return true if DP port is connected.
|
|
* \return false if DP port is disconnected.
|
|
*/
|
|
static enum drm_connector_status
|
|
cdv_intel_dp_detect(struct drm_connector *connector, bool force)
|
|
{
|
|
struct gma_encoder *encoder = gma_attached_encoder(connector);
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
enum drm_connector_status status;
|
|
struct edid *edid = NULL;
|
|
int edp = is_edp(encoder);
|
|
|
|
intel_dp->has_audio = false;
|
|
|
|
if (edp)
|
|
cdv_intel_edp_panel_vdd_on(encoder);
|
|
status = cdv_dp_detect(encoder);
|
|
if (status != connector_status_connected) {
|
|
if (edp)
|
|
cdv_intel_edp_panel_vdd_off(encoder);
|
|
return status;
|
|
}
|
|
|
|
if (intel_dp->force_audio) {
|
|
intel_dp->has_audio = intel_dp->force_audio > 0;
|
|
} else {
|
|
edid = drm_get_edid(connector, &intel_dp->adapter);
|
|
if (edid) {
|
|
intel_dp->has_audio = drm_detect_monitor_audio(edid);
|
|
kfree(edid);
|
|
}
|
|
}
|
|
if (edp)
|
|
cdv_intel_edp_panel_vdd_off(encoder);
|
|
|
|
return connector_status_connected;
|
|
}
|
|
|
|
static int cdv_intel_dp_get_modes(struct drm_connector *connector)
|
|
{
|
|
struct gma_encoder *intel_encoder = gma_attached_encoder(connector);
|
|
struct cdv_intel_dp *intel_dp = intel_encoder->dev_priv;
|
|
struct edid *edid = NULL;
|
|
int ret = 0;
|
|
int edp = is_edp(intel_encoder);
|
|
|
|
|
|
edid = drm_get_edid(connector, &intel_dp->adapter);
|
|
if (edid) {
|
|
drm_mode_connector_update_edid_property(connector, edid);
|
|
ret = drm_add_edid_modes(connector, edid);
|
|
kfree(edid);
|
|
}
|
|
|
|
if (is_edp(intel_encoder)) {
|
|
struct drm_device *dev = connector->dev;
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
|
|
|
cdv_intel_edp_panel_vdd_off(intel_encoder);
|
|
if (ret) {
|
|
if (edp && !intel_dp->panel_fixed_mode) {
|
|
struct drm_display_mode *newmode;
|
|
list_for_each_entry(newmode, &connector->probed_modes,
|
|
head) {
|
|
if (newmode->type & DRM_MODE_TYPE_PREFERRED) {
|
|
intel_dp->panel_fixed_mode =
|
|
drm_mode_duplicate(dev, newmode);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
if (!intel_dp->panel_fixed_mode && dev_priv->lfp_lvds_vbt_mode) {
|
|
intel_dp->panel_fixed_mode =
|
|
drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
|
|
if (intel_dp->panel_fixed_mode) {
|
|
intel_dp->panel_fixed_mode->type |=
|
|
DRM_MODE_TYPE_PREFERRED;
|
|
}
|
|
}
|
|
if (intel_dp->panel_fixed_mode != NULL) {
|
|
struct drm_display_mode *mode;
|
|
mode = drm_mode_duplicate(dev, intel_dp->panel_fixed_mode);
|
|
drm_mode_probed_add(connector, mode);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool
|
|
cdv_intel_dp_detect_audio(struct drm_connector *connector)
|
|
{
|
|
struct gma_encoder *encoder = gma_attached_encoder(connector);
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
struct edid *edid;
|
|
bool has_audio = false;
|
|
int edp = is_edp(encoder);
|
|
|
|
if (edp)
|
|
cdv_intel_edp_panel_vdd_on(encoder);
|
|
|
|
edid = drm_get_edid(connector, &intel_dp->adapter);
|
|
if (edid) {
|
|
has_audio = drm_detect_monitor_audio(edid);
|
|
kfree(edid);
|
|
}
|
|
if (edp)
|
|
cdv_intel_edp_panel_vdd_off(encoder);
|
|
|
|
return has_audio;
|
|
}
|
|
|
|
static int
|
|
cdv_intel_dp_set_property(struct drm_connector *connector,
|
|
struct drm_property *property,
|
|
uint64_t val)
|
|
{
|
|
struct drm_psb_private *dev_priv = connector->dev->dev_private;
|
|
struct gma_encoder *encoder = gma_attached_encoder(connector);
|
|
struct cdv_intel_dp *intel_dp = encoder->dev_priv;
|
|
int ret;
|
|
|
|
ret = drm_object_property_set_value(&connector->base, property, val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (property == dev_priv->force_audio_property) {
|
|
int i = val;
|
|
bool has_audio;
|
|
|
|
if (i == intel_dp->force_audio)
|
|
return 0;
|
|
|
|
intel_dp->force_audio = i;
|
|
|
|
if (i == 0)
|
|
has_audio = cdv_intel_dp_detect_audio(connector);
|
|
else
|
|
has_audio = i > 0;
|
|
|
|
if (has_audio == intel_dp->has_audio)
|
|
return 0;
|
|
|
|
intel_dp->has_audio = has_audio;
|
|
goto done;
|
|
}
|
|
|
|
if (property == dev_priv->broadcast_rgb_property) {
|
|
if (val == !!intel_dp->color_range)
|
|
return 0;
|
|
|
|
intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0;
|
|
goto done;
|
|
}
|
|
|
|
return -EINVAL;
|
|
|
|
done:
|
|
if (encoder->base.crtc) {
|
|
struct drm_crtc *crtc = encoder->base.crtc;
|
|
drm_crtc_helper_set_mode(crtc, &crtc->mode,
|
|
crtc->x, crtc->y,
|
|
crtc->primary->fb);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
cdv_intel_dp_destroy(struct drm_connector *connector)
|
|
{
|
|
struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
|
|
struct cdv_intel_dp *intel_dp = gma_encoder->dev_priv;
|
|
|
|
if (is_edp(gma_encoder)) {
|
|
/* cdv_intel_panel_destroy_backlight(connector->dev); */
|
|
if (intel_dp->panel_fixed_mode) {
|
|
kfree(intel_dp->panel_fixed_mode);
|
|
intel_dp->panel_fixed_mode = NULL;
|
|
}
|
|
}
|
|
i2c_del_adapter(&intel_dp->adapter);
|
|
drm_connector_unregister(connector);
|
|
drm_connector_cleanup(connector);
|
|
kfree(connector);
|
|
}
|
|
|
|
static void cdv_intel_dp_encoder_destroy(struct drm_encoder *encoder)
|
|
{
|
|
drm_encoder_cleanup(encoder);
|
|
}
|
|
|
|
static const struct drm_encoder_helper_funcs cdv_intel_dp_helper_funcs = {
|
|
.dpms = cdv_intel_dp_dpms,
|
|
.mode_fixup = cdv_intel_dp_mode_fixup,
|
|
.prepare = cdv_intel_dp_prepare,
|
|
.mode_set = cdv_intel_dp_mode_set,
|
|
.commit = cdv_intel_dp_commit,
|
|
};
|
|
|
|
static const struct drm_connector_funcs cdv_intel_dp_connector_funcs = {
|
|
.dpms = drm_helper_connector_dpms,
|
|
.detect = cdv_intel_dp_detect,
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.set_property = cdv_intel_dp_set_property,
|
|
.destroy = cdv_intel_dp_destroy,
|
|
};
|
|
|
|
static const struct drm_connector_helper_funcs cdv_intel_dp_connector_helper_funcs = {
|
|
.get_modes = cdv_intel_dp_get_modes,
|
|
.mode_valid = cdv_intel_dp_mode_valid,
|
|
.best_encoder = gma_best_encoder,
|
|
};
|
|
|
|
static const struct drm_encoder_funcs cdv_intel_dp_enc_funcs = {
|
|
.destroy = cdv_intel_dp_encoder_destroy,
|
|
};
|
|
|
|
|
|
static void cdv_intel_dp_add_properties(struct drm_connector *connector)
|
|
{
|
|
cdv_intel_attach_force_audio_property(connector);
|
|
cdv_intel_attach_broadcast_rgb_property(connector);
|
|
}
|
|
|
|
/* check the VBT to see whether the eDP is on DP-D port */
|
|
static bool cdv_intel_dpc_is_edp(struct drm_device *dev)
|
|
{
|
|
struct drm_psb_private *dev_priv = dev->dev_private;
|
|
struct child_device_config *p_child;
|
|
int i;
|
|
|
|
if (!dev_priv->child_dev_num)
|
|
return false;
|
|
|
|
for (i = 0; i < dev_priv->child_dev_num; i++) {
|
|
p_child = dev_priv->child_dev + i;
|
|
|
|
if (p_child->dvo_port == PORT_IDPC &&
|
|
p_child->device_type == DEVICE_TYPE_eDP)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* Cedarview display clock gating
|
|
|
|
We need this disable dot get correct behaviour while enabling
|
|
DP/eDP. TODO - investigate if we can turn it back to normality
|
|
after enabling */
|
|
static void cdv_disable_intel_clock_gating(struct drm_device *dev)
|
|
{
|
|
u32 reg_value;
|
|
reg_value = REG_READ(DSPCLK_GATE_D);
|
|
|
|
reg_value |= (DPUNIT_PIPEB_GATE_DISABLE |
|
|
DPUNIT_PIPEA_GATE_DISABLE |
|
|
DPCUNIT_CLOCK_GATE_DISABLE |
|
|
DPLSUNIT_CLOCK_GATE_DISABLE |
|
|
DPOUNIT_CLOCK_GATE_DISABLE |
|
|
DPIOUNIT_CLOCK_GATE_DISABLE);
|
|
|
|
REG_WRITE(DSPCLK_GATE_D, reg_value);
|
|
|
|
udelay(500);
|
|
}
|
|
|
|
void
|
|
cdv_intel_dp_init(struct drm_device *dev, struct psb_intel_mode_device *mode_dev, int output_reg)
|
|
{
|
|
struct gma_encoder *gma_encoder;
|
|
struct gma_connector *gma_connector;
|
|
struct drm_connector *connector;
|
|
struct drm_encoder *encoder;
|
|
struct cdv_intel_dp *intel_dp;
|
|
const char *name = NULL;
|
|
int type = DRM_MODE_CONNECTOR_DisplayPort;
|
|
|
|
gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
|
|
if (!gma_encoder)
|
|
return;
|
|
gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
|
|
if (!gma_connector)
|
|
goto err_connector;
|
|
intel_dp = kzalloc(sizeof(struct cdv_intel_dp), GFP_KERNEL);
|
|
if (!intel_dp)
|
|
goto err_priv;
|
|
|
|
if ((output_reg == DP_C) && cdv_intel_dpc_is_edp(dev))
|
|
type = DRM_MODE_CONNECTOR_eDP;
|
|
|
|
connector = &gma_connector->base;
|
|
encoder = &gma_encoder->base;
|
|
|
|
drm_connector_init(dev, connector, &cdv_intel_dp_connector_funcs, type);
|
|
drm_encoder_init(dev, encoder, &cdv_intel_dp_enc_funcs,
|
|
DRM_MODE_ENCODER_TMDS, NULL);
|
|
|
|
gma_connector_attach_encoder(gma_connector, gma_encoder);
|
|
|
|
if (type == DRM_MODE_CONNECTOR_DisplayPort)
|
|
gma_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
|
|
else
|
|
gma_encoder->type = INTEL_OUTPUT_EDP;
|
|
|
|
|
|
gma_encoder->dev_priv=intel_dp;
|
|
intel_dp->encoder = gma_encoder;
|
|
intel_dp->output_reg = output_reg;
|
|
|
|
drm_encoder_helper_add(encoder, &cdv_intel_dp_helper_funcs);
|
|
drm_connector_helper_add(connector, &cdv_intel_dp_connector_helper_funcs);
|
|
|
|
connector->polled = DRM_CONNECTOR_POLL_HPD;
|
|
connector->interlace_allowed = false;
|
|
connector->doublescan_allowed = false;
|
|
|
|
drm_connector_register(connector);
|
|
|
|
/* Set up the DDC bus. */
|
|
switch (output_reg) {
|
|
case DP_B:
|
|
name = "DPDDC-B";
|
|
gma_encoder->ddi_select = (DP_MASK | DDI0_SELECT);
|
|
break;
|
|
case DP_C:
|
|
name = "DPDDC-C";
|
|
gma_encoder->ddi_select = (DP_MASK | DDI1_SELECT);
|
|
break;
|
|
}
|
|
|
|
cdv_disable_intel_clock_gating(dev);
|
|
|
|
cdv_intel_dp_i2c_init(gma_connector, gma_encoder, name);
|
|
/* FIXME:fail check */
|
|
cdv_intel_dp_add_properties(connector);
|
|
|
|
if (is_edp(gma_encoder)) {
|
|
int ret;
|
|
struct edp_power_seq cur;
|
|
u32 pp_on, pp_off, pp_div;
|
|
u32 pwm_ctrl;
|
|
|
|
pp_on = REG_READ(PP_CONTROL);
|
|
pp_on &= ~PANEL_UNLOCK_MASK;
|
|
pp_on |= PANEL_UNLOCK_REGS;
|
|
|
|
REG_WRITE(PP_CONTROL, pp_on);
|
|
|
|
pwm_ctrl = REG_READ(BLC_PWM_CTL2);
|
|
pwm_ctrl |= PWM_PIPE_B;
|
|
REG_WRITE(BLC_PWM_CTL2, pwm_ctrl);
|
|
|
|
pp_on = REG_READ(PP_ON_DELAYS);
|
|
pp_off = REG_READ(PP_OFF_DELAYS);
|
|
pp_div = REG_READ(PP_DIVISOR);
|
|
|
|
/* Pull timing values out of registers */
|
|
cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >>
|
|
PANEL_POWER_UP_DELAY_SHIFT;
|
|
|
|
cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >>
|
|
PANEL_LIGHT_ON_DELAY_SHIFT;
|
|
|
|
cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >>
|
|
PANEL_LIGHT_OFF_DELAY_SHIFT;
|
|
|
|
cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >>
|
|
PANEL_POWER_DOWN_DELAY_SHIFT;
|
|
|
|
cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >>
|
|
PANEL_POWER_CYCLE_DELAY_SHIFT);
|
|
|
|
DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
|
|
cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12);
|
|
|
|
|
|
intel_dp->panel_power_up_delay = cur.t1_t3 / 10;
|
|
intel_dp->backlight_on_delay = cur.t8 / 10;
|
|
intel_dp->backlight_off_delay = cur.t9 / 10;
|
|
intel_dp->panel_power_down_delay = cur.t10 / 10;
|
|
intel_dp->panel_power_cycle_delay = (cur.t11_t12 - 1) * 100;
|
|
|
|
DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n",
|
|
intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay,
|
|
intel_dp->panel_power_cycle_delay);
|
|
|
|
DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n",
|
|
intel_dp->backlight_on_delay, intel_dp->backlight_off_delay);
|
|
|
|
|
|
cdv_intel_edp_panel_vdd_on(gma_encoder);
|
|
ret = cdv_intel_dp_aux_native_read(gma_encoder, DP_DPCD_REV,
|
|
intel_dp->dpcd,
|
|
sizeof(intel_dp->dpcd));
|
|
cdv_intel_edp_panel_vdd_off(gma_encoder);
|
|
if (ret == 0) {
|
|
/* if this fails, presume the device is a ghost */
|
|
DRM_INFO("failed to retrieve link info, disabling eDP\n");
|
|
cdv_intel_dp_encoder_destroy(encoder);
|
|
cdv_intel_dp_destroy(connector);
|
|
goto err_priv;
|
|
} else {
|
|
DRM_DEBUG_KMS("DPCD: Rev=%x LN_Rate=%x LN_CNT=%x LN_DOWNSP=%x\n",
|
|
intel_dp->dpcd[0], intel_dp->dpcd[1],
|
|
intel_dp->dpcd[2], intel_dp->dpcd[3]);
|
|
|
|
}
|
|
/* The CDV reference driver moves pnale backlight setup into the displays that
|
|
have a backlight: this is a good idea and one we should probably adopt, however
|
|
we need to migrate all the drivers before we can do that */
|
|
/*cdv_intel_panel_setup_backlight(dev); */
|
|
}
|
|
return;
|
|
|
|
err_priv:
|
|
kfree(gma_connector);
|
|
err_connector:
|
|
kfree(gma_encoder);
|
|
}
|