![Daniel Vetter](/assets/img/avatar_default.png)
struct intel_dp contains both struct intel_encoder at the beginning (as it's base-class) and an i2c adapater. When initializing, the i2c adapter gets assigned intel_encoder->ddc_adaptor = &intel_dp->adapter and the generic intel_encode_destroy happily calls kfree on this pointer. Ouch. Fix this by using a dp specific cleanup function. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
1684 lines
44 KiB
C
1684 lines
44 KiB
C
/*
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* Copyright © 2008 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 "drmP.h"
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#include "drm.h"
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#include "drm_crtc.h"
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#include "drm_crtc_helper.h"
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#include "intel_drv.h"
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#include "i915_drm.h"
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#include "i915_drv.h"
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#include "drm_dp_helper.h"
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#define DP_LINK_STATUS_SIZE 6
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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 IS_eDP(i) ((i)->base.type == INTEL_OUTPUT_EDP)
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#define IS_PCH_eDP(i) ((i)->is_pch_edp)
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struct intel_dp {
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struct intel_encoder base;
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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 dpms_mode;
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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 i2c_adapter adapter;
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struct i2c_algo_dp_aux_data algo;
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bool is_pch_edp;
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};
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static struct intel_dp *enc_to_intel_dp(struct drm_encoder *encoder)
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{
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return container_of(enc_to_intel_encoder(encoder), struct intel_dp, base);
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}
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static void intel_dp_link_train(struct intel_dp *intel_dp);
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static void intel_dp_link_down(struct intel_dp *intel_dp);
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void
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intel_edp_link_config (struct intel_encoder *intel_encoder,
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int *lane_num, int *link_bw)
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{
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struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base);
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*lane_num = intel_dp->lane_count;
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if (intel_dp->link_bw == DP_LINK_BW_1_62)
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*link_bw = 162000;
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else if (intel_dp->link_bw == DP_LINK_BW_2_7)
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*link_bw = 270000;
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}
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static int
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intel_dp_max_lane_count(struct intel_dp *intel_dp)
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{
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int max_lane_count = 4;
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if (intel_dp->dpcd[0] >= 0x11) {
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max_lane_count = intel_dp->dpcd[2] & 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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intel_dp_max_link_bw(struct intel_dp *intel_dp)
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{
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int max_link_bw = intel_dp->dpcd[1];
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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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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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/* I think this is a fiction */
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static int
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intel_dp_link_required(struct drm_device *dev, struct intel_dp *intel_dp, int pixel_clock)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
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return (pixel_clock * dev_priv->edp_bpp) / 8;
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else
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return pixel_clock * 3;
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}
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static int
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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 * 8) / 10;
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}
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static int
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intel_dp_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct drm_encoder *encoder = intel_attached_encoder(connector);
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struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
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struct drm_device *dev = connector->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp));
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int max_lanes = intel_dp_max_lane_count(intel_dp);
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if ((IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) &&
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dev_priv->panel_fixed_mode) {
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if (mode->hdisplay > dev_priv->panel_fixed_mode->hdisplay)
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return MODE_PANEL;
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if (mode->vdisplay > dev_priv->panel_fixed_mode->vdisplay)
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return MODE_PANEL;
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}
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/* only refuse the mode on non eDP since we have seen some wierd eDP panels
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which are outside spec tolerances but somehow work by magic */
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if (!IS_eDP(intel_dp) &&
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(intel_dp_link_required(connector->dev, intel_dp, mode->clock)
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> intel_dp_max_data_rate(max_link_clock, max_lanes)))
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return MODE_CLOCK_HIGH;
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if (mode->clock < 10000)
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return MODE_CLOCK_LOW;
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return MODE_OK;
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}
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static uint32_t
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pack_aux(uint8_t *src, int src_bytes)
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{
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int i;
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uint32_t v = 0;
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if (src_bytes > 4)
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src_bytes = 4;
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for (i = 0; i < src_bytes; i++)
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v |= ((uint32_t) src[i]) << ((3-i) * 8);
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return v;
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}
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static void
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unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes)
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{
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int i;
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if (dst_bytes > 4)
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dst_bytes = 4;
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for (i = 0; i < dst_bytes; i++)
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dst[i] = src >> ((3-i) * 8);
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}
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/* hrawclock is 1/4 the FSB frequency */
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static int
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intel_hrawclk(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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uint32_t clkcfg;
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clkcfg = I915_READ(CLKCFG);
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switch (clkcfg & CLKCFG_FSB_MASK) {
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case CLKCFG_FSB_400:
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return 100;
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case CLKCFG_FSB_533:
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return 133;
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case CLKCFG_FSB_667:
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return 166;
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case CLKCFG_FSB_800:
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return 200;
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case CLKCFG_FSB_1067:
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return 266;
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case CLKCFG_FSB_1333:
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return 333;
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/* these two are just a guess; one of them might be right */
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case CLKCFG_FSB_1600:
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case CLKCFG_FSB_1600_ALT:
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return 400;
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default:
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return 133;
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}
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}
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static int
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intel_dp_aux_ch(struct intel_dp *intel_dp,
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uint8_t *send, int send_bytes,
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uint8_t *recv, int recv_size)
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{
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uint32_t output_reg = intel_dp->output_reg;
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struct drm_device *dev = intel_dp->base.enc.dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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uint32_t ch_ctl = output_reg + 0x10;
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uint32_t ch_data = ch_ctl + 4;
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int i;
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int recv_bytes;
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uint32_t status;
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uint32_t aux_clock_divider;
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int try, precharge;
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/* The clock divider is based off the hrawclk,
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* and would like to run at 2MHz. So, take the
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* hrawclk value and divide by 2 and use that
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*/
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if (IS_eDP(intel_dp)) {
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if (IS_GEN6(dev))
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aux_clock_divider = 200; /* SNB eDP input clock at 400Mhz */
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else
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aux_clock_divider = 225; /* eDP input clock at 450Mhz */
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} else if (HAS_PCH_SPLIT(dev))
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aux_clock_divider = 62; /* IRL input clock fixed at 125Mhz */
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else
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aux_clock_divider = intel_hrawclk(dev) / 2;
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if (IS_GEN6(dev))
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precharge = 3;
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else
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precharge = 5;
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if (I915_READ(ch_ctl) & DP_AUX_CH_CTL_SEND_BUSY) {
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DRM_ERROR("dp_aux_ch not started status 0x%08x\n",
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I915_READ(ch_ctl));
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return -EBUSY;
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}
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/* Must try at least 3 times according to DP spec */
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for (try = 0; try < 5; try++) {
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/* Load the send data into the aux channel data registers */
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for (i = 0; i < send_bytes; i += 4)
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I915_WRITE(ch_data + i,
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pack_aux(send + i, send_bytes - i));
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/* Send the command and wait for it to complete */
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I915_WRITE(ch_ctl,
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DP_AUX_CH_CTL_SEND_BUSY |
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DP_AUX_CH_CTL_TIME_OUT_400us |
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(send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
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(precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
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(aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) |
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DP_AUX_CH_CTL_DONE |
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DP_AUX_CH_CTL_TIME_OUT_ERROR |
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DP_AUX_CH_CTL_RECEIVE_ERROR);
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for (;;) {
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status = I915_READ(ch_ctl);
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if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
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break;
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udelay(100);
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}
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/* Clear done status and any errors */
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I915_WRITE(ch_ctl,
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status |
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DP_AUX_CH_CTL_DONE |
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DP_AUX_CH_CTL_TIME_OUT_ERROR |
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DP_AUX_CH_CTL_RECEIVE_ERROR);
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if (status & DP_AUX_CH_CTL_DONE)
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break;
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}
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if ((status & DP_AUX_CH_CTL_DONE) == 0) {
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DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
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return -EBUSY;
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}
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/* Check for timeout or receive error.
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* Timeouts occur when the sink is not connected
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*/
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if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
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DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
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return -EIO;
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}
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/* Timeouts occur when the device isn't connected, so they're
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* "normal" -- don't fill the kernel log with these */
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if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
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DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
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return -ETIMEDOUT;
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}
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/* Unload any bytes sent back from the other side */
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recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >>
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DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
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if (recv_bytes > recv_size)
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recv_bytes = recv_size;
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for (i = 0; i < recv_bytes; i += 4)
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unpack_aux(I915_READ(ch_data + i),
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recv + i, recv_bytes - i);
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return recv_bytes;
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}
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/* Write data to the aux channel in native mode */
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static int
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intel_dp_aux_native_write(struct intel_dp *intel_dp,
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uint16_t address, uint8_t *send, int send_bytes)
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{
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int ret;
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uint8_t msg[20];
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int msg_bytes;
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uint8_t ack;
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if (send_bytes > 16)
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return -1;
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msg[0] = AUX_NATIVE_WRITE << 4;
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msg[1] = address >> 8;
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msg[2] = address & 0xff;
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msg[3] = send_bytes - 1;
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memcpy(&msg[4], send, send_bytes);
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msg_bytes = send_bytes + 4;
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for (;;) {
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ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1);
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if (ret < 0)
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return ret;
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if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK)
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break;
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else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
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udelay(100);
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else
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return -EIO;
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}
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return send_bytes;
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}
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/* Write a single byte to the aux channel in native mode */
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static int
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intel_dp_aux_native_write_1(struct intel_dp *intel_dp,
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uint16_t address, uint8_t byte)
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{
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return intel_dp_aux_native_write(intel_dp, address, &byte, 1);
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}
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/* read bytes from a native aux channel */
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static int
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intel_dp_aux_native_read(struct intel_dp *intel_dp,
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uint16_t address, uint8_t *recv, int recv_bytes)
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{
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uint8_t msg[4];
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int msg_bytes;
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uint8_t reply[20];
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int reply_bytes;
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uint8_t ack;
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int ret;
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msg[0] = AUX_NATIVE_READ << 4;
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msg[1] = address >> 8;
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msg[2] = address & 0xff;
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msg[3] = recv_bytes - 1;
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msg_bytes = 4;
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reply_bytes = recv_bytes + 1;
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for (;;) {
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ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes,
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reply, reply_bytes);
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if (ret == 0)
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return -EPROTO;
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if (ret < 0)
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return ret;
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ack = reply[0];
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if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) {
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memcpy(recv, reply + 1, ret - 1);
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return ret - 1;
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}
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else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
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udelay(100);
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else
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return -EIO;
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}
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}
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static int
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intel_dp_i2c_aux_ch(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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struct intel_dp *intel_dp = container_of(adapter,
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struct intel_dp,
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adapter);
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uint16_t address = algo_data->address;
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uint8_t msg[5];
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uint8_t reply[2];
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int msg_bytes;
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int reply_bytes;
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int ret;
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/* Set up the command byte */
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if (mode & MODE_I2C_READ)
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msg[0] = AUX_I2C_READ << 4;
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else
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msg[0] = AUX_I2C_WRITE << 4;
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if (!(mode & MODE_I2C_STOP))
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msg[0] |= AUX_I2C_MOT << 4;
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msg[1] = address >> 8;
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msg[2] = address;
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switch (mode) {
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case MODE_I2C_WRITE:
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msg[3] = 0;
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msg[4] = write_byte;
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msg_bytes = 5;
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reply_bytes = 1;
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break;
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case MODE_I2C_READ:
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msg[3] = 0;
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msg_bytes = 4;
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reply_bytes = 2;
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break;
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default:
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msg_bytes = 3;
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reply_bytes = 1;
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break;
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}
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for (;;) {
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ret = intel_dp_aux_ch(intel_dp,
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msg, msg_bytes,
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reply, reply_bytes);
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if (ret < 0) {
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DRM_DEBUG_KMS("aux_ch failed %d\n", ret);
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return ret;
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}
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switch (reply[0] & AUX_I2C_REPLY_MASK) {
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case AUX_I2C_REPLY_ACK:
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if (mode == MODE_I2C_READ) {
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*read_byte = reply[1];
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}
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return reply_bytes - 1;
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case AUX_I2C_REPLY_NACK:
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DRM_DEBUG_KMS("aux_ch nack\n");
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return -EREMOTEIO;
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case AUX_I2C_REPLY_DEFER:
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DRM_DEBUG_KMS("aux_ch defer\n");
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udelay(100);
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break;
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default:
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DRM_ERROR("aux_ch invalid reply 0x%02x\n", reply[0]);
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return -EREMOTEIO;
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}
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}
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}
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static int
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intel_dp_i2c_init(struct intel_dp *intel_dp,
|
|
struct intel_connector *intel_connector, const char *name)
|
|
{
|
|
DRM_DEBUG_KMS("i2c_init %s\n", name);
|
|
intel_dp->algo.running = false;
|
|
intel_dp->algo.address = 0;
|
|
intel_dp->algo.aux_ch = 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 = &intel_connector->base.kdev;
|
|
|
|
return i2c_dp_aux_add_bus(&intel_dp->adapter);
|
|
}
|
|
|
|
static bool
|
|
intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
struct drm_device *dev = encoder->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
|
|
int lane_count, clock;
|
|
int max_lane_count = intel_dp_max_lane_count(intel_dp);
|
|
int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0;
|
|
static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 };
|
|
|
|
if ((IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) &&
|
|
dev_priv->panel_fixed_mode) {
|
|
intel_fixed_panel_mode(dev_priv->panel_fixed_mode, adjusted_mode);
|
|
intel_pch_panel_fitting(dev, DRM_MODE_SCALE_FULLSCREEN,
|
|
mode, adjusted_mode);
|
|
/*
|
|
* the mode->clock is used to calculate the Data&Link M/N
|
|
* of the pipe. For the eDP the fixed clock should be used.
|
|
*/
|
|
mode->clock = dev_priv->panel_fixed_mode->clock;
|
|
}
|
|
|
|
for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) {
|
|
for (clock = 0; clock <= max_clock; clock++) {
|
|
int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count);
|
|
|
|
if (intel_dp_link_required(encoder->dev, intel_dp, mode->clock)
|
|
<= link_avail) {
|
|
intel_dp->link_bw = bws[clock];
|
|
intel_dp->lane_count = lane_count;
|
|
adjusted_mode->clock = 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_dp) || IS_PCH_eDP(intel_dp)) {
|
|
/* okay we failed just pick the highest */
|
|
intel_dp->lane_count = max_lane_count;
|
|
intel_dp->link_bw = bws[max_clock];
|
|
adjusted_mode->clock = 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 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
|
|
intel_reduce_ratio(uint32_t *num, uint32_t *den)
|
|
{
|
|
while (*num > 0xffffff || *den > 0xffffff) {
|
|
*num >>= 1;
|
|
*den >>= 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
intel_dp_compute_m_n(int bpp,
|
|
int nlanes,
|
|
int pixel_clock,
|
|
int link_clock,
|
|
struct intel_dp_m_n *m_n)
|
|
{
|
|
m_n->tu = 64;
|
|
m_n->gmch_m = (pixel_clock * bpp) >> 3;
|
|
m_n->gmch_n = link_clock * nlanes;
|
|
intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);
|
|
m_n->link_m = pixel_clock;
|
|
m_n->link_n = link_clock;
|
|
intel_reduce_ratio(&m_n->link_m, &m_n->link_n);
|
|
}
|
|
|
|
bool intel_pch_has_edp(struct drm_crtc *crtc)
|
|
{
|
|
struct drm_device *dev = crtc->dev;
|
|
struct drm_mode_config *mode_config = &dev->mode_config;
|
|
struct drm_encoder *encoder;
|
|
|
|
list_for_each_entry(encoder, &mode_config->encoder_list, head) {
|
|
struct intel_dp *intel_dp;
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
|
|
intel_dp = enc_to_intel_dp(encoder);
|
|
if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT)
|
|
return intel_dp->is_pch_edp;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
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_mode_config *mode_config = &dev->mode_config;
|
|
struct drm_encoder *encoder;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
|
|
int lane_count = 4, bpp = 24;
|
|
struct intel_dp_m_n m_n;
|
|
|
|
/*
|
|
* Find the lane count in the intel_encoder private
|
|
*/
|
|
list_for_each_entry(encoder, &mode_config->encoder_list, head) {
|
|
struct intel_dp *intel_dp;
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
|
|
intel_dp = enc_to_intel_dp(encoder);
|
|
if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT) {
|
|
lane_count = intel_dp->lane_count;
|
|
if (IS_PCH_eDP(intel_dp))
|
|
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.
|
|
*/
|
|
intel_dp_compute_m_n(bpp, lane_count,
|
|
mode->clock, adjusted_mode->clock, &m_n);
|
|
|
|
if (HAS_PCH_SPLIT(dev)) {
|
|
if (intel_crtc->pipe == 0) {
|
|
I915_WRITE(TRANSA_DATA_M1,
|
|
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
|
|
m_n.gmch_m);
|
|
I915_WRITE(TRANSA_DATA_N1, m_n.gmch_n);
|
|
I915_WRITE(TRANSA_DP_LINK_M1, m_n.link_m);
|
|
I915_WRITE(TRANSA_DP_LINK_N1, m_n.link_n);
|
|
} else {
|
|
I915_WRITE(TRANSB_DATA_M1,
|
|
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
|
|
m_n.gmch_m);
|
|
I915_WRITE(TRANSB_DATA_N1, m_n.gmch_n);
|
|
I915_WRITE(TRANSB_DP_LINK_M1, m_n.link_m);
|
|
I915_WRITE(TRANSB_DP_LINK_N1, m_n.link_n);
|
|
}
|
|
} else {
|
|
if (intel_crtc->pipe == 0) {
|
|
I915_WRITE(PIPEA_GMCH_DATA_M,
|
|
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
|
|
m_n.gmch_m);
|
|
I915_WRITE(PIPEA_GMCH_DATA_N,
|
|
m_n.gmch_n);
|
|
I915_WRITE(PIPEA_DP_LINK_M, m_n.link_m);
|
|
I915_WRITE(PIPEA_DP_LINK_N, m_n.link_n);
|
|
} else {
|
|
I915_WRITE(PIPEB_GMCH_DATA_M,
|
|
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
|
|
m_n.gmch_m);
|
|
I915_WRITE(PIPEB_GMCH_DATA_N,
|
|
m_n.gmch_n);
|
|
I915_WRITE(PIPEB_DP_LINK_M, m_n.link_m);
|
|
I915_WRITE(PIPEB_DP_LINK_N, m_n.link_n);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
struct drm_device *dev = encoder->dev;
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
|
|
struct drm_crtc *crtc = intel_dp->base.enc.crtc;
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
|
|
|
|
intel_dp->DP = (DP_VOLTAGE_0_4 |
|
|
DP_PRE_EMPHASIS_0);
|
|
|
|
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;
|
|
|
|
if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
|
|
intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
|
|
else
|
|
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[0] >= 0x11 && (intel_dp->dpcd[2] & 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 (intel_crtc->pipe == 1 && !HAS_PCH_CPT(dev))
|
|
intel_dp->DP |= DP_PIPEB_SELECT;
|
|
|
|
if (IS_eDP(intel_dp)) {
|
|
/* don't miss out required setting for eDP */
|
|
intel_dp->DP |= DP_PLL_ENABLE;
|
|
if (adjusted_mode->clock < 200000)
|
|
intel_dp->DP |= DP_PLL_FREQ_160MHZ;
|
|
else
|
|
intel_dp->DP |= DP_PLL_FREQ_270MHZ;
|
|
}
|
|
}
|
|
|
|
static void ironlake_edp_panel_on (struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp;
|
|
|
|
if (I915_READ(PCH_PP_STATUS) & PP_ON)
|
|
return;
|
|
|
|
pp = I915_READ(PCH_PP_CONTROL);
|
|
|
|
/* ILK workaround: disable reset around power sequence */
|
|
pp &= ~PANEL_POWER_RESET;
|
|
I915_WRITE(PCH_PP_CONTROL, pp);
|
|
POSTING_READ(PCH_PP_CONTROL);
|
|
|
|
pp |= PANEL_UNLOCK_REGS | POWER_TARGET_ON;
|
|
I915_WRITE(PCH_PP_CONTROL, pp);
|
|
|
|
if (wait_for(I915_READ(PCH_PP_STATUS) & PP_ON, 5000, 10))
|
|
DRM_ERROR("panel on wait timed out: 0x%08x\n",
|
|
I915_READ(PCH_PP_STATUS));
|
|
|
|
pp &= ~(PANEL_UNLOCK_REGS | EDP_FORCE_VDD);
|
|
pp |= PANEL_POWER_RESET; /* restore panel reset bit */
|
|
I915_WRITE(PCH_PP_CONTROL, pp);
|
|
POSTING_READ(PCH_PP_CONTROL);
|
|
}
|
|
|
|
static void ironlake_edp_panel_off (struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp;
|
|
|
|
pp = I915_READ(PCH_PP_CONTROL);
|
|
|
|
/* ILK workaround: disable reset around power sequence */
|
|
pp &= ~PANEL_POWER_RESET;
|
|
I915_WRITE(PCH_PP_CONTROL, pp);
|
|
POSTING_READ(PCH_PP_CONTROL);
|
|
|
|
pp &= ~POWER_TARGET_ON;
|
|
I915_WRITE(PCH_PP_CONTROL, pp);
|
|
|
|
if (wait_for((I915_READ(PCH_PP_STATUS) & PP_ON) == 0, 5000, 10))
|
|
DRM_ERROR("panel off wait timed out: 0x%08x\n",
|
|
I915_READ(PCH_PP_STATUS));
|
|
|
|
/* Make sure VDD is enabled so DP AUX will work */
|
|
pp |= EDP_FORCE_VDD | PANEL_POWER_RESET; /* restore panel reset bit */
|
|
I915_WRITE(PCH_PP_CONTROL, pp);
|
|
POSTING_READ(PCH_PP_CONTROL);
|
|
}
|
|
|
|
static void ironlake_edp_backlight_on (struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
pp = I915_READ(PCH_PP_CONTROL);
|
|
pp |= EDP_BLC_ENABLE;
|
|
I915_WRITE(PCH_PP_CONTROL, pp);
|
|
}
|
|
|
|
static void ironlake_edp_backlight_off (struct drm_device *dev)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 pp;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
pp = I915_READ(PCH_PP_CONTROL);
|
|
pp &= ~EDP_BLC_ENABLE;
|
|
I915_WRITE(PCH_PP_CONTROL, pp);
|
|
}
|
|
|
|
static void ironlake_edp_pll_on(struct drm_encoder *encoder)
|
|
{
|
|
struct drm_device *dev = encoder->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 dpa_ctl;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
dpa_ctl = I915_READ(DP_A);
|
|
dpa_ctl &= ~DP_PLL_ENABLE;
|
|
I915_WRITE(DP_A, dpa_ctl);
|
|
}
|
|
|
|
static void ironlake_edp_pll_off(struct drm_encoder *encoder)
|
|
{
|
|
struct drm_device *dev = encoder->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
u32 dpa_ctl;
|
|
|
|
dpa_ctl = I915_READ(DP_A);
|
|
dpa_ctl |= DP_PLL_ENABLE;
|
|
I915_WRITE(DP_A, dpa_ctl);
|
|
udelay(200);
|
|
}
|
|
|
|
static void intel_dp_prepare(struct drm_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
|
|
struct drm_device *dev = encoder->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t dp_reg = I915_READ(intel_dp->output_reg);
|
|
|
|
if (IS_eDP(intel_dp)) {
|
|
ironlake_edp_backlight_off(dev);
|
|
ironlake_edp_panel_on(dev);
|
|
ironlake_edp_pll_on(encoder);
|
|
}
|
|
if (dp_reg & DP_PORT_EN)
|
|
intel_dp_link_down(intel_dp);
|
|
}
|
|
|
|
static void intel_dp_commit(struct drm_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
|
|
struct drm_device *dev = encoder->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t dp_reg = I915_READ(intel_dp->output_reg);
|
|
|
|
if (!(dp_reg & DP_PORT_EN)) {
|
|
intel_dp_link_train(intel_dp);
|
|
}
|
|
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
|
|
ironlake_edp_backlight_on(dev);
|
|
}
|
|
|
|
static void
|
|
intel_dp_dpms(struct drm_encoder *encoder, int mode)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
|
|
struct drm_device *dev = encoder->dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t dp_reg = I915_READ(intel_dp->output_reg);
|
|
|
|
if (mode != DRM_MODE_DPMS_ON) {
|
|
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
|
|
ironlake_edp_backlight_off(dev);
|
|
ironlake_edp_panel_off(dev);
|
|
}
|
|
if (dp_reg & DP_PORT_EN)
|
|
intel_dp_link_down(intel_dp);
|
|
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
|
|
ironlake_edp_pll_off(encoder);
|
|
} else {
|
|
if (!(dp_reg & DP_PORT_EN)) {
|
|
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
|
|
ironlake_edp_panel_on(dev);
|
|
intel_dp_link_train(intel_dp);
|
|
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp))
|
|
ironlake_edp_backlight_on(dev);
|
|
}
|
|
}
|
|
intel_dp->dpms_mode = mode;
|
|
}
|
|
|
|
/*
|
|
* Fetch AUX CH registers 0x202 - 0x207 which contain
|
|
* link status information
|
|
*/
|
|
static bool
|
|
intel_dp_get_link_status(struct intel_dp *intel_dp,
|
|
uint8_t link_status[DP_LINK_STATUS_SIZE])
|
|
{
|
|
int ret;
|
|
|
|
ret = intel_dp_aux_native_read(intel_dp,
|
|
DP_LANE0_1_STATUS,
|
|
link_status, DP_LINK_STATUS_SIZE);
|
|
if (ret != DP_LINK_STATUS_SIZE)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static uint8_t
|
|
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
|
|
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 = intel_dp_link_status(link_status, i);
|
|
|
|
return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT;
|
|
}
|
|
|
|
static uint8_t
|
|
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 = 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
|
|
|
|
/*
|
|
* These are source-specific values; current Intel hardware supports
|
|
* a maximum voltage of 800mV and a maximum pre-emphasis of 6dB
|
|
*/
|
|
#define I830_DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_800
|
|
|
|
static uint8_t
|
|
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
|
|
intel_get_adjust_train(struct intel_dp *intel_dp,
|
|
uint8_t link_status[DP_LINK_STATUS_SIZE],
|
|
int lane_count,
|
|
uint8_t train_set[4])
|
|
{
|
|
uint8_t v = 0;
|
|
uint8_t p = 0;
|
|
int lane;
|
|
|
|
for (lane = 0; lane < lane_count; lane++) {
|
|
uint8_t this_v = intel_get_adjust_request_voltage(link_status, lane);
|
|
uint8_t this_p = intel_get_adjust_request_pre_emphasis(link_status, lane);
|
|
|
|
if (this_v > v)
|
|
v = this_v;
|
|
if (this_p > p)
|
|
p = this_p;
|
|
}
|
|
|
|
if (v >= I830_DP_VOLTAGE_MAX)
|
|
v = I830_DP_VOLTAGE_MAX | DP_TRAIN_MAX_SWING_REACHED;
|
|
|
|
if (p >= intel_dp_pre_emphasis_max(v))
|
|
p = intel_dp_pre_emphasis_max(v) | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
|
|
|
|
for (lane = 0; lane < 4; lane++)
|
|
train_set[lane] = v | p;
|
|
}
|
|
|
|
static uint32_t
|
|
intel_dp_signal_levels(uint8_t train_set, int lane_count)
|
|
{
|
|
uint32_t signal_levels = 0;
|
|
|
|
switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
|
|
case DP_TRAIN_VOLTAGE_SWING_400:
|
|
default:
|
|
signal_levels |= DP_VOLTAGE_0_4;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_600:
|
|
signal_levels |= DP_VOLTAGE_0_6;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_800:
|
|
signal_levels |= DP_VOLTAGE_0_8;
|
|
break;
|
|
case DP_TRAIN_VOLTAGE_SWING_1200:
|
|
signal_levels |= DP_VOLTAGE_1_2;
|
|
break;
|
|
}
|
|
switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
|
|
case DP_TRAIN_PRE_EMPHASIS_0:
|
|
default:
|
|
signal_levels |= DP_PRE_EMPHASIS_0;
|
|
break;
|
|
case DP_TRAIN_PRE_EMPHASIS_3_5:
|
|
signal_levels |= DP_PRE_EMPHASIS_3_5;
|
|
break;
|
|
case DP_TRAIN_PRE_EMPHASIS_6:
|
|
signal_levels |= DP_PRE_EMPHASIS_6;
|
|
break;
|
|
case DP_TRAIN_PRE_EMPHASIS_9_5:
|
|
signal_levels |= DP_PRE_EMPHASIS_9_5;
|
|
break;
|
|
}
|
|
return signal_levels;
|
|
}
|
|
|
|
/* Gen6's DP voltage swing and pre-emphasis control */
|
|
static uint32_t
|
|
intel_gen6_edp_signal_levels(uint8_t train_set)
|
|
{
|
|
switch (train_set & (DP_TRAIN_VOLTAGE_SWING_MASK|DP_TRAIN_PRE_EMPHASIS_MASK)) {
|
|
case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0:
|
|
return EDP_LINK_TRAIN_400MV_0DB_SNB_B;
|
|
case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6:
|
|
return EDP_LINK_TRAIN_400MV_6DB_SNB_B;
|
|
case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5:
|
|
return EDP_LINK_TRAIN_600MV_3_5DB_SNB_B;
|
|
case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0:
|
|
return EDP_LINK_TRAIN_800MV_0DB_SNB_B;
|
|
default:
|
|
DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level\n");
|
|
return EDP_LINK_TRAIN_400MV_0DB_SNB_B;
|
|
}
|
|
}
|
|
|
|
static uint8_t
|
|
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 = intel_dp_link_status(link_status, i);
|
|
|
|
return (l >> s) & 0xf;
|
|
}
|
|
|
|
/* Check for clock recovery is done on all channels */
|
|
static bool
|
|
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 = 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
|
|
intel_channel_eq_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count)
|
|
{
|
|
uint8_t lane_align;
|
|
uint8_t lane_status;
|
|
int lane;
|
|
|
|
lane_align = intel_dp_link_status(link_status,
|
|
DP_LANE_ALIGN_STATUS_UPDATED);
|
|
if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0)
|
|
return false;
|
|
for (lane = 0; lane < lane_count; lane++) {
|
|
lane_status = intel_get_lane_status(link_status, lane);
|
|
if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
intel_dp_set_link_train(struct intel_dp *intel_dp,
|
|
uint32_t dp_reg_value,
|
|
uint8_t dp_train_pat,
|
|
uint8_t train_set[4],
|
|
bool first)
|
|
{
|
|
struct drm_device *dev = intel_dp->base.enc.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.enc.crtc);
|
|
int ret;
|
|
|
|
I915_WRITE(intel_dp->output_reg, dp_reg_value);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
if (first)
|
|
intel_wait_for_vblank(dev, intel_crtc->pipe);
|
|
|
|
intel_dp_aux_native_write_1(intel_dp,
|
|
DP_TRAINING_PATTERN_SET,
|
|
dp_train_pat);
|
|
|
|
ret = intel_dp_aux_native_write(intel_dp,
|
|
DP_TRAINING_LANE0_SET, train_set, 4);
|
|
if (ret != 4)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
intel_dp_link_train(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp->base.enc.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint8_t train_set[4];
|
|
uint8_t link_status[DP_LINK_STATUS_SIZE];
|
|
int i;
|
|
uint8_t voltage;
|
|
bool clock_recovery = false;
|
|
bool channel_eq = false;
|
|
bool first = true;
|
|
int tries;
|
|
u32 reg;
|
|
uint32_t DP = intel_dp->DP;
|
|
|
|
/* Write the link configuration data */
|
|
intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET,
|
|
intel_dp->link_configuration,
|
|
DP_LINK_CONFIGURATION_SIZE);
|
|
|
|
DP |= DP_PORT_EN;
|
|
if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
|
|
DP &= ~DP_LINK_TRAIN_MASK_CPT;
|
|
else
|
|
DP &= ~DP_LINK_TRAIN_MASK;
|
|
memset(train_set, 0, 4);
|
|
voltage = 0xff;
|
|
tries = 0;
|
|
clock_recovery = false;
|
|
for (;;) {
|
|
/* Use train_set[0] to set the voltage and pre emphasis values */
|
|
uint32_t signal_levels;
|
|
if (IS_GEN6(dev) && IS_eDP(intel_dp)) {
|
|
signal_levels = intel_gen6_edp_signal_levels(train_set[0]);
|
|
DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
|
|
} else {
|
|
signal_levels = intel_dp_signal_levels(train_set[0], intel_dp->lane_count);
|
|
DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels;
|
|
}
|
|
|
|
if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
|
|
reg = DP | DP_LINK_TRAIN_PAT_1_CPT;
|
|
else
|
|
reg = DP | DP_LINK_TRAIN_PAT_1;
|
|
|
|
if (!intel_dp_set_link_train(intel_dp, reg,
|
|
DP_TRAINING_PATTERN_1, train_set, first))
|
|
break;
|
|
first = false;
|
|
/* Set training pattern 1 */
|
|
|
|
udelay(100);
|
|
if (!intel_dp_get_link_status(intel_dp, link_status))
|
|
break;
|
|
|
|
if (intel_clock_recovery_ok(link_status, intel_dp->lane_count)) {
|
|
clock_recovery = true;
|
|
break;
|
|
}
|
|
|
|
/* Check to see if we've tried the max voltage */
|
|
for (i = 0; i < intel_dp->lane_count; i++)
|
|
if ((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 ((train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) {
|
|
++tries;
|
|
if (tries == 5)
|
|
break;
|
|
} else
|
|
tries = 0;
|
|
voltage = train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
|
|
|
|
/* Compute new train_set as requested by target */
|
|
intel_get_adjust_train(intel_dp, link_status, intel_dp->lane_count, train_set);
|
|
}
|
|
|
|
/* channel equalization */
|
|
tries = 0;
|
|
channel_eq = false;
|
|
for (;;) {
|
|
/* Use train_set[0] to set the voltage and pre emphasis values */
|
|
uint32_t signal_levels;
|
|
|
|
if (IS_GEN6(dev) && IS_eDP(intel_dp)) {
|
|
signal_levels = intel_gen6_edp_signal_levels(train_set[0]);
|
|
DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
|
|
} else {
|
|
signal_levels = intel_dp_signal_levels(train_set[0], intel_dp->lane_count);
|
|
DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels;
|
|
}
|
|
|
|
if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
|
|
reg = DP | DP_LINK_TRAIN_PAT_2_CPT;
|
|
else
|
|
reg = DP | DP_LINK_TRAIN_PAT_2;
|
|
|
|
/* channel eq pattern */
|
|
if (!intel_dp_set_link_train(intel_dp, reg,
|
|
DP_TRAINING_PATTERN_2, train_set,
|
|
false))
|
|
break;
|
|
|
|
udelay(400);
|
|
if (!intel_dp_get_link_status(intel_dp, link_status))
|
|
break;
|
|
|
|
if (intel_channel_eq_ok(link_status, intel_dp->lane_count)) {
|
|
channel_eq = true;
|
|
break;
|
|
}
|
|
|
|
/* Try 5 times */
|
|
if (tries > 5)
|
|
break;
|
|
|
|
/* Compute new train_set as requested by target */
|
|
intel_get_adjust_train(intel_dp, link_status, intel_dp->lane_count, train_set);
|
|
++tries;
|
|
}
|
|
|
|
if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp))
|
|
reg = DP | DP_LINK_TRAIN_OFF_CPT;
|
|
else
|
|
reg = DP | DP_LINK_TRAIN_OFF;
|
|
|
|
I915_WRITE(intel_dp->output_reg, reg);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
intel_dp_aux_native_write_1(intel_dp,
|
|
DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE);
|
|
}
|
|
|
|
static void
|
|
intel_dp_link_down(struct intel_dp *intel_dp)
|
|
{
|
|
struct drm_device *dev = intel_dp->base.enc.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t DP = intel_dp->DP;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
if (IS_eDP(intel_dp)) {
|
|
DP &= ~DP_PLL_ENABLE;
|
|
I915_WRITE(intel_dp->output_reg, DP);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
udelay(100);
|
|
}
|
|
|
|
if (HAS_PCH_CPT(dev) && !IS_eDP(intel_dp)) {
|
|
DP &= ~DP_LINK_TRAIN_MASK_CPT;
|
|
I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
} else {
|
|
DP &= ~DP_LINK_TRAIN_MASK;
|
|
I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
}
|
|
|
|
udelay(17000);
|
|
|
|
if (IS_eDP(intel_dp))
|
|
DP |= DP_LINK_TRAIN_OFF;
|
|
I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
|
|
POSTING_READ(intel_dp->output_reg);
|
|
}
|
|
|
|
/*
|
|
* According to DP spec
|
|
* 5.1.2:
|
|
* 1. Read DPCD
|
|
* 2. Configure link according to Receiver Capabilities
|
|
* 3. Use Link Training from 2.5.3.3 and 3.5.1.3
|
|
* 4. Check link status on receipt of hot-plug interrupt
|
|
*/
|
|
|
|
static void
|
|
intel_dp_check_link_status(struct intel_dp *intel_dp)
|
|
{
|
|
uint8_t link_status[DP_LINK_STATUS_SIZE];
|
|
|
|
if (!intel_dp->base.enc.crtc)
|
|
return;
|
|
|
|
if (!intel_dp_get_link_status(intel_dp, link_status)) {
|
|
intel_dp_link_down(intel_dp);
|
|
return;
|
|
}
|
|
|
|
if (!intel_channel_eq_ok(link_status, intel_dp->lane_count))
|
|
intel_dp_link_train(intel_dp);
|
|
}
|
|
|
|
static enum drm_connector_status
|
|
ironlake_dp_detect(struct drm_connector *connector)
|
|
{
|
|
struct drm_encoder *encoder = intel_attached_encoder(connector);
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
|
|
enum drm_connector_status status;
|
|
|
|
status = connector_status_disconnected;
|
|
if (intel_dp_aux_native_read(intel_dp,
|
|
0x000, intel_dp->dpcd,
|
|
sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd))
|
|
{
|
|
if (intel_dp->dpcd[0] != 0)
|
|
status = connector_status_connected;
|
|
}
|
|
DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\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
|
|
intel_dp_detect(struct drm_connector *connector)
|
|
{
|
|
struct drm_encoder *encoder = intel_attached_encoder(connector);
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
|
|
struct drm_device *dev = intel_dp->base.enc.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
uint32_t temp, bit;
|
|
enum drm_connector_status status;
|
|
|
|
intel_dp->has_audio = false;
|
|
|
|
if (HAS_PCH_SPLIT(dev))
|
|
return ironlake_dp_detect(connector);
|
|
|
|
switch (intel_dp->output_reg) {
|
|
case DP_B:
|
|
bit = DPB_HOTPLUG_INT_STATUS;
|
|
break;
|
|
case DP_C:
|
|
bit = DPC_HOTPLUG_INT_STATUS;
|
|
break;
|
|
case DP_D:
|
|
bit = DPD_HOTPLUG_INT_STATUS;
|
|
break;
|
|
default:
|
|
return connector_status_unknown;
|
|
}
|
|
|
|
temp = I915_READ(PORT_HOTPLUG_STAT);
|
|
|
|
if ((temp & bit) == 0)
|
|
return connector_status_disconnected;
|
|
|
|
status = connector_status_disconnected;
|
|
if (intel_dp_aux_native_read(intel_dp,
|
|
0x000, intel_dp->dpcd,
|
|
sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd))
|
|
{
|
|
if (intel_dp->dpcd[0] != 0)
|
|
status = connector_status_connected;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int intel_dp_get_modes(struct drm_connector *connector)
|
|
{
|
|
struct drm_encoder *encoder = intel_attached_encoder(connector);
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
|
|
struct drm_device *dev = intel_dp->base.enc.dev;
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
int ret;
|
|
|
|
/* We should parse the EDID data and find out if it has an audio sink
|
|
*/
|
|
|
|
ret = intel_ddc_get_modes(connector, intel_dp->base.ddc_bus);
|
|
if (ret) {
|
|
if ((IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) &&
|
|
!dev_priv->panel_fixed_mode) {
|
|
struct drm_display_mode *newmode;
|
|
list_for_each_entry(newmode, &connector->probed_modes,
|
|
head) {
|
|
if (newmode->type & DRM_MODE_TYPE_PREFERRED) {
|
|
dev_priv->panel_fixed_mode =
|
|
drm_mode_duplicate(dev, newmode);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* if eDP has no EDID, try to use fixed panel mode from VBT */
|
|
if (IS_eDP(intel_dp) || IS_PCH_eDP(intel_dp)) {
|
|
if (dev_priv->panel_fixed_mode != NULL) {
|
|
struct drm_display_mode *mode;
|
|
mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
|
|
drm_mode_probed_add(connector, mode);
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
intel_dp_destroy (struct drm_connector *connector)
|
|
{
|
|
drm_sysfs_connector_remove(connector);
|
|
drm_connector_cleanup(connector);
|
|
kfree(connector);
|
|
}
|
|
|
|
static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
|
|
{
|
|
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
|
|
|
|
i2c_del_adapter(&intel_dp->adapter);
|
|
drm_encoder_cleanup(encoder);
|
|
kfree(intel_dp);
|
|
}
|
|
|
|
static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = {
|
|
.dpms = intel_dp_dpms,
|
|
.mode_fixup = intel_dp_mode_fixup,
|
|
.prepare = intel_dp_prepare,
|
|
.mode_set = intel_dp_mode_set,
|
|
.commit = intel_dp_commit,
|
|
};
|
|
|
|
static const struct drm_connector_funcs intel_dp_connector_funcs = {
|
|
.dpms = drm_helper_connector_dpms,
|
|
.detect = intel_dp_detect,
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.destroy = intel_dp_destroy,
|
|
};
|
|
|
|
static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = {
|
|
.get_modes = intel_dp_get_modes,
|
|
.mode_valid = intel_dp_mode_valid,
|
|
.best_encoder = intel_attached_encoder,
|
|
};
|
|
|
|
static const struct drm_encoder_funcs intel_dp_enc_funcs = {
|
|
.destroy = intel_dp_encoder_destroy,
|
|
};
|
|
|
|
void
|
|
intel_dp_hot_plug(struct intel_encoder *intel_encoder)
|
|
{
|
|
struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base);
|
|
|
|
if (intel_dp->dpms_mode == DRM_MODE_DPMS_ON)
|
|
intel_dp_check_link_status(intel_dp);
|
|
}
|
|
|
|
/* Return which DP Port should be selected for Transcoder DP control */
|
|
int
|
|
intel_trans_dp_port_sel (struct drm_crtc *crtc)
|
|
{
|
|
struct drm_device *dev = crtc->dev;
|
|
struct drm_mode_config *mode_config = &dev->mode_config;
|
|
struct drm_encoder *encoder;
|
|
|
|
list_for_each_entry(encoder, &mode_config->encoder_list, head) {
|
|
struct intel_dp *intel_dp;
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
|
|
intel_dp = enc_to_intel_dp(encoder);
|
|
if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT)
|
|
return intel_dp->output_reg;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
/* check the VBT to see whether the eDP is on DP-D port */
|
|
bool intel_dpd_is_edp(struct drm_device *dev)
|
|
{
|
|
struct drm_i915_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_IDPD &&
|
|
p_child->device_type == DEVICE_TYPE_eDP)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
intel_dp_init(struct drm_device *dev, int output_reg)
|
|
{
|
|
struct drm_i915_private *dev_priv = dev->dev_private;
|
|
struct drm_connector *connector;
|
|
struct intel_dp *intel_dp;
|
|
struct intel_encoder *intel_encoder;
|
|
struct intel_connector *intel_connector;
|
|
const char *name = NULL;
|
|
int type;
|
|
|
|
intel_dp = kzalloc(sizeof(struct intel_dp), GFP_KERNEL);
|
|
if (!intel_dp)
|
|
return;
|
|
|
|
intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
|
|
if (!intel_connector) {
|
|
kfree(intel_dp);
|
|
return;
|
|
}
|
|
intel_encoder = &intel_dp->base;
|
|
|
|
if (HAS_PCH_SPLIT(dev) && output_reg == PCH_DP_D)
|
|
if (intel_dpd_is_edp(dev))
|
|
intel_dp->is_pch_edp = true;
|
|
|
|
if (output_reg == DP_A || IS_PCH_eDP(intel_dp)) {
|
|
type = DRM_MODE_CONNECTOR_eDP;
|
|
intel_encoder->type = INTEL_OUTPUT_EDP;
|
|
} else {
|
|
type = DRM_MODE_CONNECTOR_DisplayPort;
|
|
intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
|
|
}
|
|
|
|
connector = &intel_connector->base;
|
|
drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
|
|
drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
|
|
|
|
connector->polled = DRM_CONNECTOR_POLL_HPD;
|
|
|
|
if (output_reg == DP_B || output_reg == PCH_DP_B)
|
|
intel_encoder->clone_mask = (1 << INTEL_DP_B_CLONE_BIT);
|
|
else if (output_reg == DP_C || output_reg == PCH_DP_C)
|
|
intel_encoder->clone_mask = (1 << INTEL_DP_C_CLONE_BIT);
|
|
else if (output_reg == DP_D || output_reg == PCH_DP_D)
|
|
intel_encoder->clone_mask = (1 << INTEL_DP_D_CLONE_BIT);
|
|
|
|
if (IS_eDP(intel_dp))
|
|
intel_encoder->clone_mask = (1 << INTEL_EDP_CLONE_BIT);
|
|
|
|
intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
|
|
connector->interlace_allowed = true;
|
|
connector->doublescan_allowed = 0;
|
|
|
|
intel_dp->output_reg = output_reg;
|
|
intel_dp->has_audio = false;
|
|
intel_dp->dpms_mode = DRM_MODE_DPMS_ON;
|
|
|
|
drm_encoder_init(dev, &intel_encoder->enc, &intel_dp_enc_funcs,
|
|
DRM_MODE_ENCODER_TMDS);
|
|
drm_encoder_helper_add(&intel_encoder->enc, &intel_dp_helper_funcs);
|
|
|
|
drm_mode_connector_attach_encoder(&intel_connector->base,
|
|
&intel_encoder->enc);
|
|
drm_sysfs_connector_add(connector);
|
|
|
|
/* Set up the DDC bus. */
|
|
switch (output_reg) {
|
|
case DP_A:
|
|
name = "DPDDC-A";
|
|
break;
|
|
case DP_B:
|
|
case PCH_DP_B:
|
|
dev_priv->hotplug_supported_mask |=
|
|
HDMIB_HOTPLUG_INT_STATUS;
|
|
name = "DPDDC-B";
|
|
break;
|
|
case DP_C:
|
|
case PCH_DP_C:
|
|
dev_priv->hotplug_supported_mask |=
|
|
HDMIC_HOTPLUG_INT_STATUS;
|
|
name = "DPDDC-C";
|
|
break;
|
|
case DP_D:
|
|
case PCH_DP_D:
|
|
dev_priv->hotplug_supported_mask |=
|
|
HDMID_HOTPLUG_INT_STATUS;
|
|
name = "DPDDC-D";
|
|
break;
|
|
}
|
|
|
|
intel_dp_i2c_init(intel_dp, intel_connector, name);
|
|
|
|
intel_encoder->ddc_bus = &intel_dp->adapter;
|
|
intel_encoder->hot_plug = intel_dp_hot_plug;
|
|
|
|
if (output_reg == DP_A || IS_PCH_eDP(intel_dp)) {
|
|
/* initialize panel mode from VBT if available for eDP */
|
|
if (dev_priv->lfp_lvds_vbt_mode) {
|
|
dev_priv->panel_fixed_mode =
|
|
drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
|
|
if (dev_priv->panel_fixed_mode) {
|
|
dev_priv->panel_fixed_mode->type |=
|
|
DRM_MODE_TYPE_PREFERRED;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
|
|
* 0xd. Failure to do so will result in spurious interrupts being
|
|
* generated on the port when a cable is not attached.
|
|
*/
|
|
if (IS_G4X(dev) && !IS_GM45(dev)) {
|
|
u32 temp = I915_READ(PEG_BAND_GAP_DATA);
|
|
I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
|
|
}
|
|
}
|