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| author |   jinlong zhang <jinlong.zhang@amd.com> | 2020-09-25 22:51:04 +0800 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2020-10-26 13:34:47 -0400 |
| commit | 7154a51b534707cae0f61190cab8f21cc9b2abdc (patch) | |
| tree | f0207538dae53332b2ea415a11d4c85061191656 /drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c | |
| parent | drm/amd/display: Removed unreferenced variables. (diff) | |
| download | linux-dev-7154a51b534707cae0f61190cab8f21cc9b2abdc.tar.xz linux-dev-7154a51b534707cae0f61190cab8f21cc9b2abdc.zip | |
drm/amd/display: Using udelay for specific dongle while edid return defer
[why]
Some platform has a limitation of 2ms for udelay
[how]
Add 1ms udelay for specific dongle.
Signed-off-by: jinlong zhang <jinlong.zhang@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c index dec12de37642..ef0f50db4907 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c @@ -39,6 +39,7 @@ #define AUX_POWER_UP_WA_DELAY 500 #define I2C_OVER_AUX_DEFER_WA_DELAY 70 +#define I2C_OVER_AUX_DEFER_WA_DELAY_1MS 1 /* CV smart dongle slave address for retrieving supported HDTV modes*/ #define CV_SMART_DONGLE_ADDRESS 0x20 @@ -287,6 +288,12 @@ static uint32_t defer_delay_converter_wa( sizeof(link->dpcd_caps.branch_dev_name))) return defer_delay > I2C_OVER_AUX_DEFER_WA_DELAY ? defer_delay : I2C_OVER_AUX_DEFER_WA_DELAY; + if (link->dpcd_caps.branch_dev_id == DP_BRANCH_DEVICE_ID_006037 && + !memcmp(link->dpcd_caps.branch_dev_name, + DP_DVI_CONVERTER_ID_5, + sizeof(link->dpcd_caps.branch_dev_name))) + return defer_delay > I2C_OVER_AUX_DEFER_WA_DELAY_1MS ? + I2C_OVER_AUX_DEFER_WA_DELAY_1MS : defer_delay; return defer_delay; } |