diff options
| author | Lewis Huang <Lewis.Huang@amd.com> | 2020-07-30 18:00:23 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-08-17 14:08:45 -0400 |
| commit | 6798d04205d171df94b016163b13094179878d67 (patch) | |
| tree | abe130635a193b30abd845dfff7abef8b20f65f2 /drivers/gpu/drm/amd/display/dc/dce110 | |
| parent | bcc6aa61c82d4f12df3ecc884a9eef9d566edae9 (diff) | |
drm/amd/display: Add extra T3 delay
[Why]
For some special panel, it will have an invalid HPD high cause driver
DPCD read/write fail.
[How]
Add extra T3 delay as a monitor patch in dce110_edp_wait_for_hpd_ready
Signed-off-by: Lewis Huang <Lewis.Huang@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce110')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c index 45c9e9027886..0603ddca7bd0 100644 --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c @@ -720,6 +720,7 @@ void dce110_edp_wait_for_hpd_ready( struct dc_context *ctx = link->ctx; struct graphics_object_id connector = link->link_enc->connector; struct gpio *hpd; + struct dc_sink *sink = link->local_sink; bool edp_hpd_high = false; uint32_t time_elapsed = 0; uint32_t timeout = power_up ? @@ -752,6 +753,14 @@ void dce110_edp_wait_for_hpd_ready( return; } + if (sink != NULL) { + if (sink->edid_caps.panel_patch.extra_t3_ms > 0) { + int extra_t3_in_ms = sink->edid_caps.panel_patch.extra_t3_ms; + + msleep(extra_t3_in_ms); + } + } + dal_gpio_open(hpd, GPIO_MODE_INTERRUPT); /* wait until timeout or panel detected */ |