[PATCH] drm/i915/dp: Fix the computation for compressed_bpp for DISPLAY < 13

[Nautiyal, Ankit K]

On 3/27/2024 9:35 AM, Kandpal, Suraj wrote:
>> Subject: [PATCH] drm/i915/dp: Fix the computation for compressed_bpp for
>> DISPLAY < 13
>>
>> For DISPLAY < 13, compressed bpp is chosen from a list of supported
>> compressed bpps. Fix the condition to choose the appropriate compressed
>> bpp from the list.
>>
> LGTM,
> Reviewed-by: Suraj Kandpal <suraj.kandpal at intel.com>

Thanks for the review. Patch was pushed to drm-intel-next.

Regards,

Ankit

>
>> Fixes: 1c56e9a39833 ("drm/i915/dp: Get optimal link config to have best
>> compressed bpp")
>> Cc: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
>> Cc: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
>> Cc: Jani Nikula <jani.nikula at linux.intel.com>
>> Cc: <stable at vger.kernel.org> # v6.7+
>> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/10162
>> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
>> ---
>>   drivers/gpu/drm/i915/display/intel_dp.c | 5 +++--
>>   1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
>> b/drivers/gpu/drm/i915/display/intel_dp.c
>> index e13121dc3a03..d579195f84ee 100644
>> --- a/drivers/gpu/drm/i915/display/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
>> @@ -1918,8 +1918,9 @@ icl_dsc_compute_link_config(struct intel_dp
>> *intel_dp,
>>   	dsc_max_bpp = min(dsc_max_bpp, pipe_bpp - 1);
>>
>>   	for (i = 0; i < ARRAY_SIZE(valid_dsc_bpp); i++) {
>> -		if (valid_dsc_bpp[i] < dsc_min_bpp ||
>> -		    valid_dsc_bpp[i] > dsc_max_bpp)
>> +		if (valid_dsc_bpp[i] < dsc_min_bpp)
>> +			continue;
>> +		if (valid_dsc_bpp[i] > dsc_max_bpp)
>>   			break;
>>
>>   		ret = dsc_compute_link_config(intel_dp,
>> --
>> 2.40.1