![Ville Syrjälä](/assets/img/avatar_default.png)
Moves a bunch of junk to .rodata from .data. drivers/gpu/drm/exynos/exynosdrm.ko: -.text 125792 +.text 125788 -.rodata 10972 +.rodata 11748 -.data 6720 +.data 5944 Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Link: http://patchwork.freedesktop.org/patch/msgid/1450178476-26284-19-git-send-email-boris.brezillon@free-electrons.com Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
1516 lines
36 KiB
C
1516 lines
36 KiB
C
/*
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* Samsung SoC DP (Display Port) interface driver.
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*
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* Copyright (C) 2012 Samsung Electronics Co., Ltd.
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* Author: Jingoo Han <jg1.han@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/interrupt.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/of_graph.h>
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#include <linux/gpio.h>
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#include <linux/component.h>
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#include <linux/phy/phy.h>
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#include <video/of_display_timing.h>
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#include <video/of_videomode.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 <drm/drm_atomic_helper.h>
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#include <drm/drm_panel.h>
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#include "exynos_dp_core.h"
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#include "exynos_drm_crtc.h"
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#define ctx_from_connector(c) container_of(c, struct exynos_dp_device, \
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connector)
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static inline struct exynos_drm_crtc *dp_to_crtc(struct exynos_dp_device *dp)
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{
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return to_exynos_crtc(dp->encoder.crtc);
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}
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static inline struct exynos_dp_device *encoder_to_dp(
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struct drm_encoder *e)
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{
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return container_of(e, struct exynos_dp_device, encoder);
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}
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struct bridge_init {
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struct i2c_client *client;
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struct device_node *node;
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};
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static void exynos_dp_init_dp(struct exynos_dp_device *dp)
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{
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exynos_dp_reset(dp);
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exynos_dp_swreset(dp);
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exynos_dp_init_analog_param(dp);
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exynos_dp_init_interrupt(dp);
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/* SW defined function Normal operation */
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exynos_dp_enable_sw_function(dp);
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exynos_dp_config_interrupt(dp);
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exynos_dp_init_analog_func(dp);
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exynos_dp_init_hpd(dp);
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exynos_dp_init_aux(dp);
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}
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static int exynos_dp_detect_hpd(struct exynos_dp_device *dp)
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{
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int timeout_loop = 0;
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while (exynos_dp_get_plug_in_status(dp) != 0) {
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timeout_loop++;
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if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
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dev_err(dp->dev, "failed to get hpd plug status\n");
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return -ETIMEDOUT;
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}
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usleep_range(10, 11);
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}
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return 0;
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}
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static unsigned char exynos_dp_calc_edid_check_sum(unsigned char *edid_data)
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{
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int i;
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unsigned char sum = 0;
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for (i = 0; i < EDID_BLOCK_LENGTH; i++)
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sum = sum + edid_data[i];
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return sum;
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}
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static int exynos_dp_read_edid(struct exynos_dp_device *dp)
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{
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unsigned char edid[EDID_BLOCK_LENGTH * 2];
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unsigned int extend_block = 0;
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unsigned char sum;
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unsigned char test_vector;
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int retval;
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/*
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* EDID device address is 0x50.
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* However, if necessary, you must have set upper address
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* into E-EDID in I2C device, 0x30.
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*/
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/* Read Extension Flag, Number of 128-byte EDID extension blocks */
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retval = exynos_dp_read_byte_from_i2c(dp, I2C_EDID_DEVICE_ADDR,
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EDID_EXTENSION_FLAG,
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&extend_block);
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if (retval)
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return retval;
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if (extend_block > 0) {
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dev_dbg(dp->dev, "EDID data includes a single extension!\n");
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/* Read EDID data */
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retval = exynos_dp_read_bytes_from_i2c(dp, I2C_EDID_DEVICE_ADDR,
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EDID_HEADER_PATTERN,
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EDID_BLOCK_LENGTH,
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&edid[EDID_HEADER_PATTERN]);
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if (retval != 0) {
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dev_err(dp->dev, "EDID Read failed!\n");
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return -EIO;
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}
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sum = exynos_dp_calc_edid_check_sum(edid);
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if (sum != 0) {
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dev_err(dp->dev, "EDID bad checksum!\n");
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return -EIO;
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}
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/* Read additional EDID data */
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retval = exynos_dp_read_bytes_from_i2c(dp,
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I2C_EDID_DEVICE_ADDR,
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EDID_BLOCK_LENGTH,
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EDID_BLOCK_LENGTH,
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&edid[EDID_BLOCK_LENGTH]);
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if (retval != 0) {
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dev_err(dp->dev, "EDID Read failed!\n");
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return -EIO;
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}
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sum = exynos_dp_calc_edid_check_sum(&edid[EDID_BLOCK_LENGTH]);
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if (sum != 0) {
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dev_err(dp->dev, "EDID bad checksum!\n");
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return -EIO;
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}
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exynos_dp_read_byte_from_dpcd(dp, DP_TEST_REQUEST,
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&test_vector);
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if (test_vector & DP_TEST_LINK_EDID_READ) {
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exynos_dp_write_byte_to_dpcd(dp,
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DP_TEST_EDID_CHECKSUM,
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edid[EDID_BLOCK_LENGTH + EDID_CHECKSUM]);
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exynos_dp_write_byte_to_dpcd(dp,
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DP_TEST_RESPONSE,
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DP_TEST_EDID_CHECKSUM_WRITE);
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}
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} else {
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dev_info(dp->dev, "EDID data does not include any extensions.\n");
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/* Read EDID data */
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retval = exynos_dp_read_bytes_from_i2c(dp,
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I2C_EDID_DEVICE_ADDR,
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EDID_HEADER_PATTERN,
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EDID_BLOCK_LENGTH,
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&edid[EDID_HEADER_PATTERN]);
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if (retval != 0) {
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dev_err(dp->dev, "EDID Read failed!\n");
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return -EIO;
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}
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sum = exynos_dp_calc_edid_check_sum(edid);
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if (sum != 0) {
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dev_err(dp->dev, "EDID bad checksum!\n");
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return -EIO;
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}
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exynos_dp_read_byte_from_dpcd(dp,
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DP_TEST_REQUEST,
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&test_vector);
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if (test_vector & DP_TEST_LINK_EDID_READ) {
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exynos_dp_write_byte_to_dpcd(dp,
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DP_TEST_EDID_CHECKSUM,
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edid[EDID_CHECKSUM]);
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exynos_dp_write_byte_to_dpcd(dp,
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DP_TEST_RESPONSE,
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DP_TEST_EDID_CHECKSUM_WRITE);
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}
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}
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dev_dbg(dp->dev, "EDID Read success!\n");
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return 0;
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}
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static int exynos_dp_handle_edid(struct exynos_dp_device *dp)
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{
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u8 buf[12];
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int i;
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int retval;
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/* Read DPCD DP_DPCD_REV~RECEIVE_PORT1_CAP_1 */
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retval = exynos_dp_read_bytes_from_dpcd(dp, DP_DPCD_REV,
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12, buf);
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if (retval)
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return retval;
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/* Read EDID */
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for (i = 0; i < 3; i++) {
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retval = exynos_dp_read_edid(dp);
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if (!retval)
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break;
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}
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return retval;
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}
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static void exynos_dp_enable_rx_to_enhanced_mode(struct exynos_dp_device *dp,
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bool enable)
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{
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u8 data;
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exynos_dp_read_byte_from_dpcd(dp, DP_LANE_COUNT_SET, &data);
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if (enable)
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exynos_dp_write_byte_to_dpcd(dp, DP_LANE_COUNT_SET,
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DP_LANE_COUNT_ENHANCED_FRAME_EN |
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DPCD_LANE_COUNT_SET(data));
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else
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exynos_dp_write_byte_to_dpcd(dp, DP_LANE_COUNT_SET,
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DPCD_LANE_COUNT_SET(data));
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}
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static int exynos_dp_is_enhanced_mode_available(struct exynos_dp_device *dp)
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{
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u8 data;
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int retval;
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exynos_dp_read_byte_from_dpcd(dp, DP_MAX_LANE_COUNT, &data);
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retval = DPCD_ENHANCED_FRAME_CAP(data);
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return retval;
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}
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static void exynos_dp_set_enhanced_mode(struct exynos_dp_device *dp)
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{
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u8 data;
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data = exynos_dp_is_enhanced_mode_available(dp);
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exynos_dp_enable_rx_to_enhanced_mode(dp, data);
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exynos_dp_enable_enhanced_mode(dp, data);
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}
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static void exynos_dp_training_pattern_dis(struct exynos_dp_device *dp)
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{
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exynos_dp_set_training_pattern(dp, DP_NONE);
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exynos_dp_write_byte_to_dpcd(dp,
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DP_TRAINING_PATTERN_SET,
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DP_TRAINING_PATTERN_DISABLE);
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}
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static void exynos_dp_set_lane_lane_pre_emphasis(struct exynos_dp_device *dp,
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int pre_emphasis, int lane)
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{
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switch (lane) {
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case 0:
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exynos_dp_set_lane0_pre_emphasis(dp, pre_emphasis);
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break;
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case 1:
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exynos_dp_set_lane1_pre_emphasis(dp, pre_emphasis);
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break;
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case 2:
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exynos_dp_set_lane2_pre_emphasis(dp, pre_emphasis);
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break;
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case 3:
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exynos_dp_set_lane3_pre_emphasis(dp, pre_emphasis);
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break;
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}
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}
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static int exynos_dp_link_start(struct exynos_dp_device *dp)
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{
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u8 buf[4];
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int lane, lane_count, pll_tries, retval;
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lane_count = dp->link_train.lane_count;
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dp->link_train.lt_state = CLOCK_RECOVERY;
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dp->link_train.eq_loop = 0;
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for (lane = 0; lane < lane_count; lane++)
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dp->link_train.cr_loop[lane] = 0;
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/* Set link rate and count as you want to establish*/
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exynos_dp_set_link_bandwidth(dp, dp->link_train.link_rate);
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exynos_dp_set_lane_count(dp, dp->link_train.lane_count);
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/* Setup RX configuration */
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buf[0] = dp->link_train.link_rate;
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buf[1] = dp->link_train.lane_count;
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retval = exynos_dp_write_bytes_to_dpcd(dp, DP_LINK_BW_SET,
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2, buf);
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if (retval)
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return retval;
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/* Set TX pre-emphasis to minimum */
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for (lane = 0; lane < lane_count; lane++)
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exynos_dp_set_lane_lane_pre_emphasis(dp,
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PRE_EMPHASIS_LEVEL_0, lane);
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/* Wait for PLL lock */
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pll_tries = 0;
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while (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
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if (pll_tries == DP_TIMEOUT_LOOP_COUNT) {
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dev_err(dp->dev, "Wait for PLL lock timed out\n");
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return -ETIMEDOUT;
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}
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pll_tries++;
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usleep_range(90, 120);
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}
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/* Set training pattern 1 */
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exynos_dp_set_training_pattern(dp, TRAINING_PTN1);
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/* Set RX training pattern */
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retval = exynos_dp_write_byte_to_dpcd(dp,
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DP_TRAINING_PATTERN_SET,
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DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_1);
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if (retval)
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return retval;
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for (lane = 0; lane < lane_count; lane++)
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buf[lane] = DP_TRAIN_PRE_EMPH_LEVEL_0 |
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DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
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retval = exynos_dp_write_bytes_to_dpcd(dp, DP_TRAINING_LANE0_SET,
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lane_count, buf);
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return retval;
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}
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static unsigned char exynos_dp_get_lane_status(u8 link_status[2], int lane)
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{
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int shift = (lane & 1) * 4;
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u8 link_value = link_status[lane>>1];
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return (link_value >> shift) & 0xf;
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}
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static int exynos_dp_clock_recovery_ok(u8 link_status[2], int lane_count)
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{
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int lane;
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u8 lane_status;
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for (lane = 0; lane < lane_count; lane++) {
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lane_status = exynos_dp_get_lane_status(link_status, lane);
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if ((lane_status & DP_LANE_CR_DONE) == 0)
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return -EINVAL;
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}
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return 0;
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}
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static int exynos_dp_channel_eq_ok(u8 link_status[2], u8 link_align,
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int lane_count)
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{
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int lane;
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u8 lane_status;
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if ((link_align & DP_INTERLANE_ALIGN_DONE) == 0)
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return -EINVAL;
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for (lane = 0; lane < lane_count; lane++) {
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lane_status = exynos_dp_get_lane_status(link_status, lane);
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lane_status &= DP_CHANNEL_EQ_BITS;
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if (lane_status != DP_CHANNEL_EQ_BITS)
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return -EINVAL;
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}
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return 0;
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}
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static unsigned char exynos_dp_get_adjust_request_voltage(u8 adjust_request[2],
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int lane)
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{
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int shift = (lane & 1) * 4;
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u8 link_value = adjust_request[lane>>1];
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return (link_value >> shift) & 0x3;
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}
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static unsigned char exynos_dp_get_adjust_request_pre_emphasis(
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u8 adjust_request[2],
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int lane)
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{
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int shift = (lane & 1) * 4;
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u8 link_value = adjust_request[lane>>1];
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return ((link_value >> shift) & 0xc) >> 2;
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}
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static void exynos_dp_set_lane_link_training(struct exynos_dp_device *dp,
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u8 training_lane_set, int lane)
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{
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switch (lane) {
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case 0:
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exynos_dp_set_lane0_link_training(dp, training_lane_set);
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break;
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case 1:
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exynos_dp_set_lane1_link_training(dp, training_lane_set);
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break;
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case 2:
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exynos_dp_set_lane2_link_training(dp, training_lane_set);
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break;
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case 3:
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exynos_dp_set_lane3_link_training(dp, training_lane_set);
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break;
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}
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}
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static unsigned int exynos_dp_get_lane_link_training(
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struct exynos_dp_device *dp,
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int lane)
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{
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u32 reg;
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switch (lane) {
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case 0:
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reg = exynos_dp_get_lane0_link_training(dp);
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break;
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case 1:
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reg = exynos_dp_get_lane1_link_training(dp);
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break;
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case 2:
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reg = exynos_dp_get_lane2_link_training(dp);
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break;
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case 3:
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reg = exynos_dp_get_lane3_link_training(dp);
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break;
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default:
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WARN_ON(1);
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return 0;
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}
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return reg;
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}
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static void exynos_dp_reduce_link_rate(struct exynos_dp_device *dp)
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{
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exynos_dp_training_pattern_dis(dp);
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exynos_dp_set_enhanced_mode(dp);
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dp->link_train.lt_state = FAILED;
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}
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static void exynos_dp_get_adjust_training_lane(struct exynos_dp_device *dp,
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u8 adjust_request[2])
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{
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int lane, lane_count;
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u8 voltage_swing, pre_emphasis, training_lane;
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lane_count = dp->link_train.lane_count;
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for (lane = 0; lane < lane_count; lane++) {
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voltage_swing = exynos_dp_get_adjust_request_voltage(
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adjust_request, lane);
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pre_emphasis = exynos_dp_get_adjust_request_pre_emphasis(
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adjust_request, lane);
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training_lane = DPCD_VOLTAGE_SWING_SET(voltage_swing) |
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DPCD_PRE_EMPHASIS_SET(pre_emphasis);
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if (voltage_swing == VOLTAGE_LEVEL_3)
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training_lane |= DP_TRAIN_MAX_SWING_REACHED;
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if (pre_emphasis == PRE_EMPHASIS_LEVEL_3)
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training_lane |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
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dp->link_train.training_lane[lane] = training_lane;
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}
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}
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|
|
static int exynos_dp_process_clock_recovery(struct exynos_dp_device *dp)
|
|
{
|
|
int lane, lane_count, retval;
|
|
u8 voltage_swing, pre_emphasis, training_lane;
|
|
u8 link_status[2], adjust_request[2];
|
|
|
|
usleep_range(100, 101);
|
|
|
|
lane_count = dp->link_train.lane_count;
|
|
|
|
retval = exynos_dp_read_bytes_from_dpcd(dp,
|
|
DP_LANE0_1_STATUS, 2, link_status);
|
|
if (retval)
|
|
return retval;
|
|
|
|
retval = exynos_dp_read_bytes_from_dpcd(dp,
|
|
DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request);
|
|
if (retval)
|
|
return retval;
|
|
|
|
if (exynos_dp_clock_recovery_ok(link_status, lane_count) == 0) {
|
|
/* set training pattern 2 for EQ */
|
|
exynos_dp_set_training_pattern(dp, TRAINING_PTN2);
|
|
|
|
retval = exynos_dp_write_byte_to_dpcd(dp,
|
|
DP_TRAINING_PATTERN_SET,
|
|
DP_LINK_SCRAMBLING_DISABLE |
|
|
DP_TRAINING_PATTERN_2);
|
|
if (retval)
|
|
return retval;
|
|
|
|
dev_info(dp->dev, "Link Training Clock Recovery success\n");
|
|
dp->link_train.lt_state = EQUALIZER_TRAINING;
|
|
} else {
|
|
for (lane = 0; lane < lane_count; lane++) {
|
|
training_lane = exynos_dp_get_lane_link_training(
|
|
dp, lane);
|
|
voltage_swing = exynos_dp_get_adjust_request_voltage(
|
|
adjust_request, lane);
|
|
pre_emphasis = exynos_dp_get_adjust_request_pre_emphasis(
|
|
adjust_request, lane);
|
|
|
|
if (DPCD_VOLTAGE_SWING_GET(training_lane) ==
|
|
voltage_swing &&
|
|
DPCD_PRE_EMPHASIS_GET(training_lane) ==
|
|
pre_emphasis)
|
|
dp->link_train.cr_loop[lane]++;
|
|
|
|
if (dp->link_train.cr_loop[lane] == MAX_CR_LOOP ||
|
|
voltage_swing == VOLTAGE_LEVEL_3 ||
|
|
pre_emphasis == PRE_EMPHASIS_LEVEL_3) {
|
|
dev_err(dp->dev, "CR Max reached (%d,%d,%d)\n",
|
|
dp->link_train.cr_loop[lane],
|
|
voltage_swing, pre_emphasis);
|
|
exynos_dp_reduce_link_rate(dp);
|
|
return -EIO;
|
|
}
|
|
}
|
|
}
|
|
|
|
exynos_dp_get_adjust_training_lane(dp, adjust_request);
|
|
|
|
for (lane = 0; lane < lane_count; lane++)
|
|
exynos_dp_set_lane_link_training(dp,
|
|
dp->link_train.training_lane[lane], lane);
|
|
|
|
retval = exynos_dp_write_bytes_to_dpcd(dp,
|
|
DP_TRAINING_LANE0_SET, lane_count,
|
|
dp->link_train.training_lane);
|
|
if (retval)
|
|
return retval;
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int exynos_dp_process_equalizer_training(struct exynos_dp_device *dp)
|
|
{
|
|
int lane, lane_count, retval;
|
|
u32 reg;
|
|
u8 link_align, link_status[2], adjust_request[2];
|
|
|
|
usleep_range(400, 401);
|
|
|
|
lane_count = dp->link_train.lane_count;
|
|
|
|
retval = exynos_dp_read_bytes_from_dpcd(dp,
|
|
DP_LANE0_1_STATUS, 2, link_status);
|
|
if (retval)
|
|
return retval;
|
|
|
|
if (exynos_dp_clock_recovery_ok(link_status, lane_count)) {
|
|
exynos_dp_reduce_link_rate(dp);
|
|
return -EIO;
|
|
}
|
|
|
|
retval = exynos_dp_read_bytes_from_dpcd(dp,
|
|
DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request);
|
|
if (retval)
|
|
return retval;
|
|
|
|
retval = exynos_dp_read_byte_from_dpcd(dp,
|
|
DP_LANE_ALIGN_STATUS_UPDATED, &link_align);
|
|
if (retval)
|
|
return retval;
|
|
|
|
exynos_dp_get_adjust_training_lane(dp, adjust_request);
|
|
|
|
if (!exynos_dp_channel_eq_ok(link_status, link_align, lane_count)) {
|
|
/* traing pattern Set to Normal */
|
|
exynos_dp_training_pattern_dis(dp);
|
|
|
|
dev_info(dp->dev, "Link Training success!\n");
|
|
|
|
exynos_dp_get_link_bandwidth(dp, ®);
|
|
dp->link_train.link_rate = reg;
|
|
dev_dbg(dp->dev, "final bandwidth = %.2x\n",
|
|
dp->link_train.link_rate);
|
|
|
|
exynos_dp_get_lane_count(dp, ®);
|
|
dp->link_train.lane_count = reg;
|
|
dev_dbg(dp->dev, "final lane count = %.2x\n",
|
|
dp->link_train.lane_count);
|
|
|
|
/* set enhanced mode if available */
|
|
exynos_dp_set_enhanced_mode(dp);
|
|
dp->link_train.lt_state = FINISHED;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* not all locked */
|
|
dp->link_train.eq_loop++;
|
|
|
|
if (dp->link_train.eq_loop > MAX_EQ_LOOP) {
|
|
dev_err(dp->dev, "EQ Max loop\n");
|
|
exynos_dp_reduce_link_rate(dp);
|
|
return -EIO;
|
|
}
|
|
|
|
for (lane = 0; lane < lane_count; lane++)
|
|
exynos_dp_set_lane_link_training(dp,
|
|
dp->link_train.training_lane[lane], lane);
|
|
|
|
retval = exynos_dp_write_bytes_to_dpcd(dp, DP_TRAINING_LANE0_SET,
|
|
lane_count, dp->link_train.training_lane);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void exynos_dp_get_max_rx_bandwidth(struct exynos_dp_device *dp,
|
|
u8 *bandwidth)
|
|
{
|
|
u8 data;
|
|
|
|
/*
|
|
* For DP rev.1.1, Maximum link rate of Main Link lanes
|
|
* 0x06 = 1.62 Gbps, 0x0a = 2.7 Gbps
|
|
*/
|
|
exynos_dp_read_byte_from_dpcd(dp, DP_MAX_LINK_RATE, &data);
|
|
*bandwidth = data;
|
|
}
|
|
|
|
static void exynos_dp_get_max_rx_lane_count(struct exynos_dp_device *dp,
|
|
u8 *lane_count)
|
|
{
|
|
u8 data;
|
|
|
|
/*
|
|
* For DP rev.1.1, Maximum number of Main Link lanes
|
|
* 0x01 = 1 lane, 0x02 = 2 lanes, 0x04 = 4 lanes
|
|
*/
|
|
exynos_dp_read_byte_from_dpcd(dp, DP_MAX_LANE_COUNT, &data);
|
|
*lane_count = DPCD_MAX_LANE_COUNT(data);
|
|
}
|
|
|
|
static void exynos_dp_init_training(struct exynos_dp_device *dp,
|
|
enum link_lane_count_type max_lane,
|
|
enum link_rate_type max_rate)
|
|
{
|
|
/*
|
|
* MACRO_RST must be applied after the PLL_LOCK to avoid
|
|
* the DP inter pair skew issue for at least 10 us
|
|
*/
|
|
exynos_dp_reset_macro(dp);
|
|
|
|
/* Initialize by reading RX's DPCD */
|
|
exynos_dp_get_max_rx_bandwidth(dp, &dp->link_train.link_rate);
|
|
exynos_dp_get_max_rx_lane_count(dp, &dp->link_train.lane_count);
|
|
|
|
if ((dp->link_train.link_rate != LINK_RATE_1_62GBPS) &&
|
|
(dp->link_train.link_rate != LINK_RATE_2_70GBPS)) {
|
|
dev_err(dp->dev, "Rx Max Link Rate is abnormal :%x !\n",
|
|
dp->link_train.link_rate);
|
|
dp->link_train.link_rate = LINK_RATE_1_62GBPS;
|
|
}
|
|
|
|
if (dp->link_train.lane_count == 0) {
|
|
dev_err(dp->dev, "Rx Max Lane count is abnormal :%x !\n",
|
|
dp->link_train.lane_count);
|
|
dp->link_train.lane_count = (u8)LANE_COUNT1;
|
|
}
|
|
|
|
/* Setup TX lane count & rate */
|
|
if (dp->link_train.lane_count > max_lane)
|
|
dp->link_train.lane_count = max_lane;
|
|
if (dp->link_train.link_rate > max_rate)
|
|
dp->link_train.link_rate = max_rate;
|
|
|
|
/* All DP analog module power up */
|
|
exynos_dp_set_analog_power_down(dp, POWER_ALL, 0);
|
|
}
|
|
|
|
static int exynos_dp_sw_link_training(struct exynos_dp_device *dp)
|
|
{
|
|
int retval = 0, training_finished = 0;
|
|
|
|
dp->link_train.lt_state = START;
|
|
|
|
/* Process here */
|
|
while (!retval && !training_finished) {
|
|
switch (dp->link_train.lt_state) {
|
|
case START:
|
|
retval = exynos_dp_link_start(dp);
|
|
if (retval)
|
|
dev_err(dp->dev, "LT link start failed!\n");
|
|
break;
|
|
case CLOCK_RECOVERY:
|
|
retval = exynos_dp_process_clock_recovery(dp);
|
|
if (retval)
|
|
dev_err(dp->dev, "LT CR failed!\n");
|
|
break;
|
|
case EQUALIZER_TRAINING:
|
|
retval = exynos_dp_process_equalizer_training(dp);
|
|
if (retval)
|
|
dev_err(dp->dev, "LT EQ failed!\n");
|
|
break;
|
|
case FINISHED:
|
|
training_finished = 1;
|
|
break;
|
|
case FAILED:
|
|
return -EREMOTEIO;
|
|
}
|
|
}
|
|
if (retval)
|
|
dev_err(dp->dev, "eDP link training failed (%d)\n", retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int exynos_dp_set_link_train(struct exynos_dp_device *dp,
|
|
u32 count,
|
|
u32 bwtype)
|
|
{
|
|
int i;
|
|
int retval;
|
|
|
|
for (i = 0; i < DP_TIMEOUT_LOOP_COUNT; i++) {
|
|
exynos_dp_init_training(dp, count, bwtype);
|
|
retval = exynos_dp_sw_link_training(dp);
|
|
if (retval == 0)
|
|
break;
|
|
|
|
usleep_range(100, 110);
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int exynos_dp_config_video(struct exynos_dp_device *dp)
|
|
{
|
|
int retval = 0;
|
|
int timeout_loop = 0;
|
|
int done_count = 0;
|
|
|
|
exynos_dp_config_video_slave_mode(dp);
|
|
|
|
exynos_dp_set_video_color_format(dp);
|
|
|
|
if (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
|
|
dev_err(dp->dev, "PLL is not locked yet.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (;;) {
|
|
timeout_loop++;
|
|
if (exynos_dp_is_slave_video_stream_clock_on(dp) == 0)
|
|
break;
|
|
if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
|
|
dev_err(dp->dev, "Timeout of video streamclk ok\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
usleep_range(1, 2);
|
|
}
|
|
|
|
/* Set to use the register calculated M/N video */
|
|
exynos_dp_set_video_cr_mn(dp, CALCULATED_M, 0, 0);
|
|
|
|
/* For video bist, Video timing must be generated by register */
|
|
exynos_dp_set_video_timing_mode(dp, VIDEO_TIMING_FROM_CAPTURE);
|
|
|
|
/* Disable video mute */
|
|
exynos_dp_enable_video_mute(dp, 0);
|
|
|
|
/* Configure video slave mode */
|
|
exynos_dp_enable_video_master(dp, 0);
|
|
|
|
timeout_loop = 0;
|
|
|
|
for (;;) {
|
|
timeout_loop++;
|
|
if (exynos_dp_is_video_stream_on(dp) == 0) {
|
|
done_count++;
|
|
if (done_count > 10)
|
|
break;
|
|
} else if (done_count) {
|
|
done_count = 0;
|
|
}
|
|
if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
|
|
dev_err(dp->dev, "Timeout of video streamclk ok\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
usleep_range(1000, 1001);
|
|
}
|
|
|
|
if (retval != 0)
|
|
dev_err(dp->dev, "Video stream is not detected!\n");
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void exynos_dp_enable_scramble(struct exynos_dp_device *dp, bool enable)
|
|
{
|
|
u8 data;
|
|
|
|
if (enable) {
|
|
exynos_dp_enable_scrambling(dp);
|
|
|
|
exynos_dp_read_byte_from_dpcd(dp,
|
|
DP_TRAINING_PATTERN_SET,
|
|
&data);
|
|
exynos_dp_write_byte_to_dpcd(dp,
|
|
DP_TRAINING_PATTERN_SET,
|
|
(u8)(data & ~DP_LINK_SCRAMBLING_DISABLE));
|
|
} else {
|
|
exynos_dp_disable_scrambling(dp);
|
|
|
|
exynos_dp_read_byte_from_dpcd(dp,
|
|
DP_TRAINING_PATTERN_SET,
|
|
&data);
|
|
exynos_dp_write_byte_to_dpcd(dp,
|
|
DP_TRAINING_PATTERN_SET,
|
|
(u8)(data | DP_LINK_SCRAMBLING_DISABLE));
|
|
}
|
|
}
|
|
|
|
static irqreturn_t exynos_dp_irq_handler(int irq, void *arg)
|
|
{
|
|
struct exynos_dp_device *dp = arg;
|
|
|
|
enum dp_irq_type irq_type;
|
|
|
|
irq_type = exynos_dp_get_irq_type(dp);
|
|
switch (irq_type) {
|
|
case DP_IRQ_TYPE_HP_CABLE_IN:
|
|
dev_dbg(dp->dev, "Received irq - cable in\n");
|
|
schedule_work(&dp->hotplug_work);
|
|
exynos_dp_clear_hotplug_interrupts(dp);
|
|
break;
|
|
case DP_IRQ_TYPE_HP_CABLE_OUT:
|
|
dev_dbg(dp->dev, "Received irq - cable out\n");
|
|
exynos_dp_clear_hotplug_interrupts(dp);
|
|
break;
|
|
case DP_IRQ_TYPE_HP_CHANGE:
|
|
/*
|
|
* We get these change notifications once in a while, but there
|
|
* is nothing we can do with them. Just ignore it for now and
|
|
* only handle cable changes.
|
|
*/
|
|
dev_dbg(dp->dev, "Received irq - hotplug change; ignoring.\n");
|
|
exynos_dp_clear_hotplug_interrupts(dp);
|
|
break;
|
|
default:
|
|
dev_err(dp->dev, "Received irq - unknown type!\n");
|
|
break;
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void exynos_dp_hotplug(struct work_struct *work)
|
|
{
|
|
struct exynos_dp_device *dp;
|
|
|
|
dp = container_of(work, struct exynos_dp_device, hotplug_work);
|
|
|
|
if (dp->drm_dev)
|
|
drm_helper_hpd_irq_event(dp->drm_dev);
|
|
}
|
|
|
|
static void exynos_dp_commit(struct drm_encoder *encoder)
|
|
{
|
|
struct exynos_dp_device *dp = encoder_to_dp(encoder);
|
|
int ret;
|
|
|
|
/* Keep the panel disabled while we configure video */
|
|
if (dp->panel) {
|
|
if (drm_panel_disable(dp->panel))
|
|
DRM_ERROR("failed to disable the panel\n");
|
|
}
|
|
|
|
ret = exynos_dp_detect_hpd(dp);
|
|
if (ret) {
|
|
/* Cable has been disconnected, we're done */
|
|
return;
|
|
}
|
|
|
|
ret = exynos_dp_handle_edid(dp);
|
|
if (ret) {
|
|
dev_err(dp->dev, "unable to handle edid\n");
|
|
return;
|
|
}
|
|
|
|
ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count,
|
|
dp->video_info->link_rate);
|
|
if (ret) {
|
|
dev_err(dp->dev, "unable to do link train\n");
|
|
return;
|
|
}
|
|
|
|
exynos_dp_enable_scramble(dp, 1);
|
|
exynos_dp_enable_rx_to_enhanced_mode(dp, 1);
|
|
exynos_dp_enable_enhanced_mode(dp, 1);
|
|
|
|
exynos_dp_set_lane_count(dp, dp->video_info->lane_count);
|
|
exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate);
|
|
|
|
exynos_dp_init_video(dp);
|
|
ret = exynos_dp_config_video(dp);
|
|
if (ret)
|
|
dev_err(dp->dev, "unable to config video\n");
|
|
|
|
/* Safe to enable the panel now */
|
|
if (dp->panel) {
|
|
if (drm_panel_enable(dp->panel))
|
|
DRM_ERROR("failed to enable the panel\n");
|
|
}
|
|
|
|
/* Enable video */
|
|
exynos_dp_start_video(dp);
|
|
}
|
|
|
|
static enum drm_connector_status exynos_dp_detect(
|
|
struct drm_connector *connector, bool force)
|
|
{
|
|
return connector_status_connected;
|
|
}
|
|
|
|
static void exynos_dp_connector_destroy(struct drm_connector *connector)
|
|
{
|
|
drm_connector_unregister(connector);
|
|
drm_connector_cleanup(connector);
|
|
}
|
|
|
|
static const struct drm_connector_funcs exynos_dp_connector_funcs = {
|
|
.dpms = drm_atomic_helper_connector_dpms,
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.detect = exynos_dp_detect,
|
|
.destroy = exynos_dp_connector_destroy,
|
|
.reset = drm_atomic_helper_connector_reset,
|
|
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
|
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
|
};
|
|
|
|
static int exynos_dp_get_modes(struct drm_connector *connector)
|
|
{
|
|
struct exynos_dp_device *dp = ctx_from_connector(connector);
|
|
struct drm_display_mode *mode;
|
|
|
|
if (dp->panel)
|
|
return drm_panel_get_modes(dp->panel);
|
|
|
|
mode = drm_mode_create(connector->dev);
|
|
if (!mode) {
|
|
DRM_ERROR("failed to create a new display mode.\n");
|
|
return 0;
|
|
}
|
|
|
|
drm_display_mode_from_videomode(&dp->priv.vm, mode);
|
|
mode->width_mm = dp->priv.width_mm;
|
|
mode->height_mm = dp->priv.height_mm;
|
|
connector->display_info.width_mm = mode->width_mm;
|
|
connector->display_info.height_mm = mode->height_mm;
|
|
|
|
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
|
|
drm_mode_set_name(mode);
|
|
drm_mode_probed_add(connector, mode);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct drm_encoder *exynos_dp_best_encoder(
|
|
struct drm_connector *connector)
|
|
{
|
|
struct exynos_dp_device *dp = ctx_from_connector(connector);
|
|
|
|
return &dp->encoder;
|
|
}
|
|
|
|
static const struct drm_connector_helper_funcs exynos_dp_connector_helper_funcs = {
|
|
.get_modes = exynos_dp_get_modes,
|
|
.best_encoder = exynos_dp_best_encoder,
|
|
};
|
|
|
|
/* returns the number of bridges attached */
|
|
static int exynos_drm_attach_lcd_bridge(struct exynos_dp_device *dp,
|
|
struct drm_encoder *encoder)
|
|
{
|
|
int ret;
|
|
|
|
encoder->bridge->next = dp->ptn_bridge;
|
|
dp->ptn_bridge->encoder = encoder;
|
|
ret = drm_bridge_attach(encoder->dev, dp->ptn_bridge);
|
|
if (ret) {
|
|
DRM_ERROR("Failed to attach bridge to drm\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int exynos_dp_bridge_attach(struct drm_bridge *bridge)
|
|
{
|
|
struct exynos_dp_device *dp = bridge->driver_private;
|
|
struct drm_encoder *encoder = &dp->encoder;
|
|
struct drm_connector *connector = &dp->connector;
|
|
int ret;
|
|
|
|
/* Pre-empt DP connector creation if there's a bridge */
|
|
if (dp->ptn_bridge) {
|
|
ret = exynos_drm_attach_lcd_bridge(dp, encoder);
|
|
if (!ret)
|
|
return 0;
|
|
}
|
|
|
|
connector->polled = DRM_CONNECTOR_POLL_HPD;
|
|
|
|
ret = drm_connector_init(dp->drm_dev, connector,
|
|
&exynos_dp_connector_funcs, DRM_MODE_CONNECTOR_eDP);
|
|
if (ret) {
|
|
DRM_ERROR("Failed to initialize connector with drm\n");
|
|
return ret;
|
|
}
|
|
|
|
drm_connector_helper_add(connector, &exynos_dp_connector_helper_funcs);
|
|
drm_connector_register(connector);
|
|
drm_mode_connector_attach_encoder(connector, encoder);
|
|
|
|
if (dp->panel)
|
|
ret = drm_panel_attach(dp->panel, &dp->connector);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void exynos_dp_bridge_enable(struct drm_bridge *bridge)
|
|
{
|
|
struct exynos_dp_device *dp = bridge->driver_private;
|
|
struct exynos_drm_crtc *crtc = dp_to_crtc(dp);
|
|
|
|
if (dp->dpms_mode == DRM_MODE_DPMS_ON)
|
|
return;
|
|
|
|
pm_runtime_get_sync(dp->dev);
|
|
|
|
if (dp->panel) {
|
|
if (drm_panel_prepare(dp->panel)) {
|
|
DRM_ERROR("failed to setup the panel\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (crtc->ops->clock_enable)
|
|
crtc->ops->clock_enable(dp_to_crtc(dp), true);
|
|
|
|
phy_power_on(dp->phy);
|
|
exynos_dp_init_dp(dp);
|
|
enable_irq(dp->irq);
|
|
exynos_dp_commit(&dp->encoder);
|
|
|
|
dp->dpms_mode = DRM_MODE_DPMS_ON;
|
|
}
|
|
|
|
static void exynos_dp_bridge_disable(struct drm_bridge *bridge)
|
|
{
|
|
struct exynos_dp_device *dp = bridge->driver_private;
|
|
struct exynos_drm_crtc *crtc = dp_to_crtc(dp);
|
|
|
|
if (dp->dpms_mode != DRM_MODE_DPMS_ON)
|
|
return;
|
|
|
|
if (dp->panel) {
|
|
if (drm_panel_disable(dp->panel)) {
|
|
DRM_ERROR("failed to disable the panel\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
disable_irq(dp->irq);
|
|
flush_work(&dp->hotplug_work);
|
|
phy_power_off(dp->phy);
|
|
|
|
if (crtc->ops->clock_enable)
|
|
crtc->ops->clock_enable(dp_to_crtc(dp), false);
|
|
|
|
if (dp->panel) {
|
|
if (drm_panel_unprepare(dp->panel))
|
|
DRM_ERROR("failed to turnoff the panel\n");
|
|
}
|
|
|
|
pm_runtime_put_sync(dp->dev);
|
|
|
|
dp->dpms_mode = DRM_MODE_DPMS_OFF;
|
|
}
|
|
|
|
static void exynos_dp_bridge_nop(struct drm_bridge *bridge)
|
|
{
|
|
/* do nothing */
|
|
}
|
|
|
|
static const struct drm_bridge_funcs exynos_dp_bridge_funcs = {
|
|
.enable = exynos_dp_bridge_enable,
|
|
.disable = exynos_dp_bridge_disable,
|
|
.pre_enable = exynos_dp_bridge_nop,
|
|
.post_disable = exynos_dp_bridge_nop,
|
|
.attach = exynos_dp_bridge_attach,
|
|
};
|
|
|
|
static int exynos_dp_create_connector(struct drm_encoder *encoder)
|
|
{
|
|
struct exynos_dp_device *dp = encoder_to_dp(encoder);
|
|
struct drm_device *drm_dev = dp->drm_dev;
|
|
struct drm_bridge *bridge;
|
|
int ret;
|
|
|
|
bridge = devm_kzalloc(drm_dev->dev, sizeof(*bridge), GFP_KERNEL);
|
|
if (!bridge) {
|
|
DRM_ERROR("failed to allocate for drm bridge\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dp->bridge = bridge;
|
|
|
|
encoder->bridge = bridge;
|
|
bridge->driver_private = dp;
|
|
bridge->encoder = encoder;
|
|
bridge->funcs = &exynos_dp_bridge_funcs;
|
|
|
|
ret = drm_bridge_attach(drm_dev, bridge);
|
|
if (ret) {
|
|
DRM_ERROR("failed to attach drm bridge\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool exynos_dp_mode_fixup(struct drm_encoder *encoder,
|
|
const struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static void exynos_dp_mode_set(struct drm_encoder *encoder,
|
|
struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
}
|
|
|
|
static void exynos_dp_enable(struct drm_encoder *encoder)
|
|
{
|
|
}
|
|
|
|
static void exynos_dp_disable(struct drm_encoder *encoder)
|
|
{
|
|
}
|
|
|
|
static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = {
|
|
.mode_fixup = exynos_dp_mode_fixup,
|
|
.mode_set = exynos_dp_mode_set,
|
|
.enable = exynos_dp_enable,
|
|
.disable = exynos_dp_disable,
|
|
};
|
|
|
|
static const struct drm_encoder_funcs exynos_dp_encoder_funcs = {
|
|
.destroy = drm_encoder_cleanup,
|
|
};
|
|
|
|
static struct video_info *exynos_dp_dt_parse_pdata(struct device *dev)
|
|
{
|
|
struct device_node *dp_node = dev->of_node;
|
|
struct video_info *dp_video_config;
|
|
|
|
dp_video_config = devm_kzalloc(dev,
|
|
sizeof(*dp_video_config), GFP_KERNEL);
|
|
if (!dp_video_config)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
dp_video_config->h_sync_polarity =
|
|
of_property_read_bool(dp_node, "hsync-active-high");
|
|
|
|
dp_video_config->v_sync_polarity =
|
|
of_property_read_bool(dp_node, "vsync-active-high");
|
|
|
|
dp_video_config->interlaced =
|
|
of_property_read_bool(dp_node, "interlaced");
|
|
|
|
if (of_property_read_u32(dp_node, "samsung,color-space",
|
|
&dp_video_config->color_space)) {
|
|
dev_err(dev, "failed to get color-space\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
if (of_property_read_u32(dp_node, "samsung,dynamic-range",
|
|
&dp_video_config->dynamic_range)) {
|
|
dev_err(dev, "failed to get dynamic-range\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
if (of_property_read_u32(dp_node, "samsung,ycbcr-coeff",
|
|
&dp_video_config->ycbcr_coeff)) {
|
|
dev_err(dev, "failed to get ycbcr-coeff\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
if (of_property_read_u32(dp_node, "samsung,color-depth",
|
|
&dp_video_config->color_depth)) {
|
|
dev_err(dev, "failed to get color-depth\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
if (of_property_read_u32(dp_node, "samsung,link-rate",
|
|
&dp_video_config->link_rate)) {
|
|
dev_err(dev, "failed to get link-rate\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
if (of_property_read_u32(dp_node, "samsung,lane-count",
|
|
&dp_video_config->lane_count)) {
|
|
dev_err(dev, "failed to get lane-count\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
return dp_video_config;
|
|
}
|
|
|
|
static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
|
|
{
|
|
int ret;
|
|
|
|
ret = of_get_videomode(dp->dev->of_node, &dp->priv.vm,
|
|
OF_USE_NATIVE_MODE);
|
|
if (ret) {
|
|
DRM_ERROR("failed: of_get_videomode() : %d\n", ret);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
|
|
{
|
|
struct exynos_dp_device *dp = dev_get_drvdata(dev);
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct drm_device *drm_dev = data;
|
|
struct drm_encoder *encoder = &dp->encoder;
|
|
struct resource *res;
|
|
unsigned int irq_flags;
|
|
int pipe, ret = 0;
|
|
|
|
dp->dev = &pdev->dev;
|
|
dp->dpms_mode = DRM_MODE_DPMS_OFF;
|
|
|
|
dp->video_info = exynos_dp_dt_parse_pdata(&pdev->dev);
|
|
if (IS_ERR(dp->video_info))
|
|
return PTR_ERR(dp->video_info);
|
|
|
|
dp->phy = devm_phy_get(dp->dev, "dp");
|
|
if (IS_ERR(dp->phy)) {
|
|
dev_err(dp->dev, "no DP phy configured\n");
|
|
ret = PTR_ERR(dp->phy);
|
|
if (ret) {
|
|
/*
|
|
* phy itself is not enabled, so we can move forward
|
|
* assigning NULL to phy pointer.
|
|
*/
|
|
if (ret == -ENOSYS || ret == -ENODEV)
|
|
dp->phy = NULL;
|
|
else
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (!dp->panel && !dp->ptn_bridge) {
|
|
ret = exynos_dp_dt_parse_panel(dp);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
dp->clock = devm_clk_get(&pdev->dev, "dp");
|
|
if (IS_ERR(dp->clock)) {
|
|
dev_err(&pdev->dev, "failed to get clock\n");
|
|
return PTR_ERR(dp->clock);
|
|
}
|
|
|
|
clk_prepare_enable(dp->clock);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
dp->reg_base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(dp->reg_base))
|
|
return PTR_ERR(dp->reg_base);
|
|
|
|
dp->hpd_gpio = of_get_named_gpio(dev->of_node, "samsung,hpd-gpio", 0);
|
|
|
|
if (gpio_is_valid(dp->hpd_gpio)) {
|
|
/*
|
|
* Set up the hotplug GPIO from the device tree as an interrupt.
|
|
* Simply specifying a different interrupt in the device tree
|
|
* doesn't work since we handle hotplug rather differently when
|
|
* using a GPIO. We also need the actual GPIO specifier so
|
|
* that we can get the current state of the GPIO.
|
|
*/
|
|
ret = devm_gpio_request_one(&pdev->dev, dp->hpd_gpio, GPIOF_IN,
|
|
"hpd_gpio");
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to get hpd gpio\n");
|
|
return ret;
|
|
}
|
|
dp->irq = gpio_to_irq(dp->hpd_gpio);
|
|
irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
|
|
} else {
|
|
dp->hpd_gpio = -ENODEV;
|
|
dp->irq = platform_get_irq(pdev, 0);
|
|
irq_flags = 0;
|
|
}
|
|
|
|
if (dp->irq == -ENXIO) {
|
|
dev_err(&pdev->dev, "failed to get irq\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
INIT_WORK(&dp->hotplug_work, exynos_dp_hotplug);
|
|
|
|
ret = devm_request_irq(&pdev->dev, dp->irq, exynos_dp_irq_handler,
|
|
irq_flags, "exynos-dp", dp);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to request irq\n");
|
|
return ret;
|
|
}
|
|
disable_irq(dp->irq);
|
|
|
|
dp->drm_dev = drm_dev;
|
|
|
|
pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev,
|
|
EXYNOS_DISPLAY_TYPE_LCD);
|
|
if (pipe < 0)
|
|
return pipe;
|
|
|
|
encoder->possible_crtcs = 1 << pipe;
|
|
|
|
DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
|
|
|
|
drm_encoder_init(drm_dev, encoder, &exynos_dp_encoder_funcs,
|
|
DRM_MODE_ENCODER_TMDS, NULL);
|
|
|
|
drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs);
|
|
|
|
ret = exynos_dp_create_connector(encoder);
|
|
if (ret) {
|
|
DRM_ERROR("failed to create connector ret = %d\n", ret);
|
|
drm_encoder_cleanup(encoder);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void exynos_dp_unbind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct exynos_dp_device *dp = dev_get_drvdata(dev);
|
|
|
|
exynos_dp_disable(&dp->encoder);
|
|
}
|
|
|
|
static const struct component_ops exynos_dp_ops = {
|
|
.bind = exynos_dp_bind,
|
|
.unbind = exynos_dp_unbind,
|
|
};
|
|
|
|
static int exynos_dp_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct device_node *panel_node = NULL, *bridge_node, *endpoint = NULL;
|
|
struct exynos_dp_device *dp;
|
|
int ret;
|
|
|
|
dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
|
|
GFP_KERNEL);
|
|
if (!dp)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, dp);
|
|
|
|
/* This is for the backward compatibility. */
|
|
panel_node = of_parse_phandle(dev->of_node, "panel", 0);
|
|
if (panel_node) {
|
|
dp->panel = of_drm_find_panel(panel_node);
|
|
of_node_put(panel_node);
|
|
if (!dp->panel)
|
|
return -EPROBE_DEFER;
|
|
} else {
|
|
endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
|
|
if (endpoint) {
|
|
panel_node = of_graph_get_remote_port_parent(endpoint);
|
|
if (panel_node) {
|
|
dp->panel = of_drm_find_panel(panel_node);
|
|
of_node_put(panel_node);
|
|
if (!dp->panel)
|
|
return -EPROBE_DEFER;
|
|
} else {
|
|
DRM_ERROR("no port node for panel device.\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (endpoint)
|
|
goto out;
|
|
|
|
endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
|
|
if (endpoint) {
|
|
bridge_node = of_graph_get_remote_port_parent(endpoint);
|
|
if (bridge_node) {
|
|
dp->ptn_bridge = of_drm_find_bridge(bridge_node);
|
|
of_node_put(bridge_node);
|
|
if (!dp->ptn_bridge)
|
|
return -EPROBE_DEFER;
|
|
} else
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
out:
|
|
pm_runtime_enable(dev);
|
|
|
|
ret = component_add(&pdev->dev, &exynos_dp_ops);
|
|
if (ret)
|
|
goto err_disable_pm_runtime;
|
|
|
|
return ret;
|
|
|
|
err_disable_pm_runtime:
|
|
pm_runtime_disable(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int exynos_dp_remove(struct platform_device *pdev)
|
|
{
|
|
pm_runtime_disable(&pdev->dev);
|
|
component_del(&pdev->dev, &exynos_dp_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int exynos_dp_suspend(struct device *dev)
|
|
{
|
|
struct exynos_dp_device *dp = dev_get_drvdata(dev);
|
|
|
|
clk_disable_unprepare(dp->clock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int exynos_dp_resume(struct device *dev)
|
|
{
|
|
struct exynos_dp_device *dp = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(dp->clock);
|
|
if (ret < 0) {
|
|
DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops exynos_dp_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(exynos_dp_suspend, exynos_dp_resume, NULL)
|
|
};
|
|
|
|
static const struct of_device_id exynos_dp_match[] = {
|
|
{ .compatible = "samsung,exynos5-dp" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, exynos_dp_match);
|
|
|
|
struct platform_driver dp_driver = {
|
|
.probe = exynos_dp_probe,
|
|
.remove = exynos_dp_remove,
|
|
.driver = {
|
|
.name = "exynos-dp",
|
|
.owner = THIS_MODULE,
|
|
.pm = &exynos_dp_pm_ops,
|
|
.of_match_table = exynos_dp_match,
|
|
},
|
|
};
|
|
|
|
MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
|
|
MODULE_DESCRIPTION("Samsung SoC DP Driver");
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MODULE_LICENSE("GPL v2");
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