* [PATCH v2] drm/amd/display: Update DCN302 SR Exit Latency
@ 2021-04-08 17:10 Aurabindo Pillai
2021-04-08 17:46 ` Harry Wentland
0 siblings, 1 reply; 3+ messages in thread
From: Aurabindo Pillai @ 2021-04-08 17:10 UTC (permalink / raw)
To: amd-gfx; +Cc: aurabindo.pillai, Bindu.R
From: Joshua Aberback <joshua.aberback@amd.com>
[Why&How]
Update SR Exit Latency to fix screen flickering caused due to OTG
underflow. This is the recommended value given by the hardware IP team.
Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
---
drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
index a928c1d9a557..fc2dea243d1b 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
@@ -164,7 +164,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_02_soc = {
.min_dcfclk = 500.0, /* TODO: set this to actual min DCFCLK */
.num_states = 1,
- .sr_exit_time_us = 12,
+ .sr_exit_time_us = 15.5,
.sr_enter_plus_exit_time_us = 20,
.urgent_latency_us = 4.0,
.urgent_latency_pixel_data_only_us = 4.0,
--
2.31.1
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^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] drm/amd/display: Update DCN302 SR Exit Latency
2021-04-08 17:10 [PATCH v2] drm/amd/display: Update DCN302 SR Exit Latency Aurabindo Pillai
@ 2021-04-08 17:46 ` Harry Wentland
2021-04-08 18:01 ` Aurabindo Pillai
0 siblings, 1 reply; 3+ messages in thread
From: Harry Wentland @ 2021-04-08 17:46 UTC (permalink / raw)
To: Aurabindo Pillai, amd-gfx; +Cc: Bindu.R
On 2021-04-08 1:10 p.m., Aurabindo Pillai wrote:
> From: Joshua Aberback <joshua.aberback@amd.com>
>
> [Why&How]
> Update SR Exit Latency to fix screen flickering caused due to OTG
> underflow. This is the recommended value given by the hardware IP team.
>
> Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
> Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Harry
> ---
> drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
> index a928c1d9a557..fc2dea243d1b 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
> @@ -164,7 +164,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_02_soc = {
>
> .min_dcfclk = 500.0, /* TODO: set this to actual min DCFCLK */
> .num_states = 1,
> - .sr_exit_time_us = 12,
> + .sr_exit_time_us = 15.5,
> .sr_enter_plus_exit_time_us = 20,
> .urgent_latency_us = 4.0,
> .urgent_latency_pixel_data_only_us = 4.0,
>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] drm/amd/display: Update DCN302 SR Exit Latency
2021-04-08 17:46 ` Harry Wentland
@ 2021-04-08 18:01 ` Aurabindo Pillai
0 siblings, 0 replies; 3+ messages in thread
From: Aurabindo Pillai @ 2021-04-08 18:01 UTC (permalink / raw)
To: Harry Wentland, amd-gfx; +Cc: Bindu.R
Thank you Harry.
On 2021-04-08 1:46 p.m., Harry Wentland wrote:
> On 2021-04-08 1:10 p.m., Aurabindo Pillai wrote:
>> From: Joshua Aberback <joshua.aberback@amd.com>
>>
>> [Why&How]
>> Update SR Exit Latency to fix screen flickering caused due to OTG
>> underflow. This is the recommended value given by the hardware IP team.
>>
>> Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
>> Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
>
> Reviewed-by: Harry Wentland <harry.wentland@amd.com>
>
> Harry
>
>> ---
>> drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
>> b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
>> index a928c1d9a557..fc2dea243d1b 100644
>> --- a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
>> +++ b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c
>> @@ -164,7 +164,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_02_soc = {
>> .min_dcfclk = 500.0, /* TODO: set this to actual min DCFCLK */
>> .num_states = 1,
>> - .sr_exit_time_us = 12,
>> + .sr_exit_time_us = 15.5,
>> .sr_enter_plus_exit_time_us = 20,
>> .urgent_latency_us = 4.0,
>> .urgent_latency_pixel_data_only_us = 4.0,
>>
>
--
Regards,
Aurabindo Pillai
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amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
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2021-04-08 17:10 [PATCH v2] drm/amd/display: Update DCN302 SR Exit Latency Aurabindo Pillai
2021-04-08 17:46 ` Harry Wentland
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