diff options
| author | Tanmay Shah <tanmay@codeaurora.org> | 2020-09-25 21:50:48 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2020-11-04 08:26:25 -0800 |
| commit | 6625e2637d93d2f52ef0d17656f21bfa2cb4983a (patch) | |
| tree | 228c177671bd2a16534188cc1d1da2bd435c8477 /drivers/gpu/drm | |
| parent | c7314613226a05758bb8c5a350521959c7db4ea9 (diff) | |
| download | linux-6625e2637d93d2f52ef0d17656f21bfa2cb4983a.tar.bz2 | |
drm/msm/dp: DisplayPort PHY compliance tests fixup
Bandwidth code was being used as test link rate. Fix this by converting
bandwidth code to test link rate
Do not reset voltage and pre-emphasis level during IRQ HPD attention
interrupt. Also fix pre-emphasis parsing during test link status process
Signed-off-by: Tanmay Shah <tanmay@codeaurora.org>
Fixes: 8ede2ecc3e5e ("drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets")
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_ctrl.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_display.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_link.c | 12 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_link.h | 1 |
4 files changed, 13 insertions, 4 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 2e3e1917351f..872b12689e31 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1643,9 +1643,6 @@ int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl) if (rc) return rc; - ctrl->link->phy_params.p_level = 0; - ctrl->link->phy_params.v_level = 0; - while (--link_train_max_retries && !atomic_read(&ctrl->dp_ctrl.aborted)) { rc = dp_ctrl_reinitialize_mainlink(ctrl); diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index e175aa3fd3a9..ae9989ece73f 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -335,6 +335,7 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp) dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ; dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes; + dp_link_reset_phy_params_vx_px(dp->link); rc = dp_ctrl_on_link(dp->ctrl); if (rc) { DRM_ERROR("failed to complete DP link training\n"); diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c index c811da515fb3..49d7fad36fc4 100644 --- a/drivers/gpu/drm/msm/dp/dp_link.c +++ b/drivers/gpu/drm/msm/dp/dp_link.c @@ -869,6 +869,9 @@ static int dp_link_parse_vx_px(struct dp_link_private *link) drm_dp_get_adjust_request_voltage(link->link_status, 0); link->dp_link.phy_params.p_level = drm_dp_get_adjust_request_pre_emphasis(link->link_status, 0); + + link->dp_link.phy_params.p_level >>= DP_TRAIN_PRE_EMPHASIS_SHIFT; + DRM_DEBUG_DP("Requested: v_level = 0x%x, p_level = 0x%x\n", link->dp_link.phy_params.v_level, link->dp_link.phy_params.p_level); @@ -911,7 +914,8 @@ static int dp_link_process_phy_test_pattern_request( link->request.test_lane_count); link->dp_link.link_params.num_lanes = link->request.test_lane_count; - link->dp_link.link_params.rate = link->request.test_link_rate; + link->dp_link.link_params.rate = + drm_dp_bw_code_to_link_rate(link->request.test_link_rate); ret = dp_link_parse_vx_px(link); @@ -1156,6 +1160,12 @@ int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status) return 0; } +void dp_link_reset_phy_params_vx_px(struct dp_link *dp_link) +{ + dp_link->phy_params.v_level = 0; + dp_link->phy_params.p_level = 0; +} + u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp) { u32 tbd; diff --git a/drivers/gpu/drm/msm/dp/dp_link.h b/drivers/gpu/drm/msm/dp/dp_link.h index 49811b6221e5..9dd4dd926530 100644 --- a/drivers/gpu/drm/msm/dp/dp_link.h +++ b/drivers/gpu/drm/msm/dp/dp_link.h @@ -135,6 +135,7 @@ static inline u32 dp_link_bit_depth_to_bpc(u32 tbd) } } +void dp_link_reset_phy_params_vx_px(struct dp_link *dp_link); u32 dp_link_get_test_bits_depth(struct dp_link *dp_link, u32 bpp); int dp_link_process_request(struct dp_link *dp_link); int dp_link_get_colorimetry_config(struct dp_link *dp_link); |