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drm/msm/dp: clear EDID on display unplug

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Currently the driver only updates the EDID when it detects a connected
monitor, which results in the connector still listing outdated modes
even after the display is unplugged. Set connector's EDID to NULL on
unplug to clear the list of modes.

Tested-by: Val Packett <val@packett.cool> # x1e80100-dell-latitude-7455
Tested-by: Yongxing Mou <yongxing.mou@oss.qualcomm.com> # Hamoa IOT EVK, QCS8300 Ride
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/727619/
Link: https://lore.kernel.org/r/20260524-hpd-refactor-v6-10-cf3ab488dd7b@oss.qualcomm.com
This commit is contained in:
Dmitry Baryshkov 2026-05-24 13:33:38 +03:00
parent 3ea2d1c3d1
commit 24acb35682
3 changed files with 14 additions and 0 deletions
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4
drivers/gpu/drm/msm/dp/dp_display.c
View File

@ -451,6 +451,10 @@ static int msm_dp_hpd_unplug_handle(struct msm_dp_display_private *dp)
if (!dp->plugged)
return 0;
/* Don't forget modes for eDP */
if (!dp->msm_dp_display.is_edp)
msm_dp_panel_unplugged(dp->panel, dp->msm_dp_display.connector);
/* triggered by irq_hdp with sink_count = 0 */
if (dp->link->sink_count == 0)
msm_dp_display_host_phy_exit(dp);

8
drivers/gpu/drm/msm/dp/dp_panel.c
View File

@ -293,6 +293,14 @@ int msm_dp_panel_read_sink_caps(struct msm_dp_panel *msm_dp_panel,
return rc;
}
void msm_dp_panel_unplugged(struct msm_dp_panel *msm_dp_panel,
struct drm_connector *connector)
{
drm_edid_connector_update(connector, NULL);
drm_edid_free(msm_dp_panel->drm_edid);
msm_dp_panel->drm_edid = NULL;
}
u32 msm_dp_panel_get_mode_bpp(struct msm_dp_panel *msm_dp_panel,
u32 mode_edid_bpp, u32 mode_pclk_khz)
{

2
drivers/gpu/drm/msm/dp/dp_panel.h
View File

@ -49,6 +49,8 @@ int msm_dp_panel_deinit(struct msm_dp_panel *msm_dp_panel);
int msm_dp_panel_timing_cfg(struct msm_dp_panel *msm_dp_panel, bool wide_bus_en);
int msm_dp_panel_read_sink_caps(struct msm_dp_panel *msm_dp_panel,
struct drm_connector *connector);
void msm_dp_panel_unplugged(struct msm_dp_panel *msm_dp_panel,
struct drm_connector *connector);
u32 msm_dp_panel_get_mode_bpp(struct msm_dp_panel *msm_dp_panel, u32 mode_max_bpp,
u32 mode_pclk_khz);
int msm_dp_panel_get_modes(struct msm_dp_panel *msm_dp_panel,