diff options
| author | Aleksandrs Vinarskis <alex.vinarskis@gmail.com> | 2025-05-08 01:58:59 +0300 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> | 2025-05-12 19:18:49 +0300 |
| commit | 9351d3d302060d114de2f0c648579c0aadbd8f72 (patch) | |
| tree | 304d7186ac852a64fef3b9572fce7d7cf2b4ebfe | |
| parent | de01fc9fa1753f958cf127a0695aa777fee108c7 (diff) | |
| download | linux-9351d3d302060d114de2f0c648579c0aadbd8f72.tar.xz | |
drm/msm/dp: Fix support of LTTPR initialization
Initialize LTTPR before msm_dp_panel_read_sink_caps, as DPTX shall
(re)read DPRX caps after LTTPR detection, as required by DP 2.1a,
Section 3.6.7.6.1.
Fixes: 72d0af4accd9 ("drm/msm/dp: Add support for LTTPR handling")
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Aleksandrs Vinarskis <alex.vinarskis@gmail.com>
Tested-by: Jessica Zhang <quic_jesszhan@quicinc.com> # SA8775P
Tested-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Rob Clark <robdclark@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/652301/
Link: https://lore.kernel.org/r/20250507230113.14270-2-alex.vinarskis@gmail.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_display.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index ece184d20c0f..c39c1669c74c 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -360,12 +360,12 @@ static int msm_dp_display_send_hpd_notification(struct msm_dp_display_private *d return 0; } -static void msm_dp_display_lttpr_init(struct msm_dp_display_private *dp) +static void msm_dp_display_lttpr_init(struct msm_dp_display_private *dp, u8 *dpcd) { u8 lttpr_caps[DP_LTTPR_COMMON_CAP_SIZE]; int rc; - if (drm_dp_read_lttpr_common_caps(dp->aux, dp->panel->dpcd, lttpr_caps)) + if (drm_dp_read_lttpr_common_caps(dp->aux, dpcd, lttpr_caps)) return; rc = drm_dp_lttpr_init(dp->aux, drm_dp_lttpr_count(lttpr_caps)); @@ -378,12 +378,17 @@ static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp) struct drm_connector *connector = dp->msm_dp_display.connector; const struct drm_display_info *info = &connector->display_info; int rc = 0; + u8 dpcd[DP_RECEIVER_CAP_SIZE]; - rc = msm_dp_panel_read_sink_caps(dp->panel, connector); + rc = drm_dp_read_dpcd_caps(dp->aux, dpcd); if (rc) goto end; - msm_dp_display_lttpr_init(dp); + msm_dp_display_lttpr_init(dp, dpcd); + + rc = msm_dp_panel_read_sink_caps(dp->panel, connector); + if (rc) + goto end; msm_dp_link_process_request(dp->link); |