iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/i915/dp: Move compressed bpp check with 420 format inside the helper

Browse Source 
Move the check for limiting compressed bits_per_pixel for 420,422
formats in the helper to compute bits_per_pixel.

v2: Fix typo in commit message. (Ankit)

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230817142459.89764-3-ankit.k.nautiyal@intel.com
This commit is contained in:
Ankit Nautiyal 2023-08-17 19:54:43 +05:30
parent a1476c2a97
commit 3a4b4809c8
1 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/gpu/drm/i915/display/intel_dp.c
View File

@ -773,6 +773,15 @@ u16 intel_dp_dsc_get_output_bpp(struct drm_i915_private *i915,
if (output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
bits_per_pixel *= 2;
/*
* According to DSC 1.2a Section 4.1.1 Table 4.1 the maximum
* supported PPS value can be 63.9375 and with the further
* mention that for 420, 422 formats, bpp should be programmed double
* the target bpp restricting our target bpp to be 31.9375 at max.
*/
if (output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
bits_per_pixel = min_t(u32, bits_per_pixel, 31);
drm_dbg_kms(&i915->drm, "Max link bpp is %u for %u timeslots "
"total bw %u pixel clock %u\n",
bits_per_pixel, timeslots,
@ -1738,15 +1747,6 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
pipe_config->output_format,
pipe_bpp,
timeslots);
/*
* According to DSC 1.2a Section 4.1.1 Table 4.1 the maximum
* supported PPS value can be 63.9375 and with the further
* mention that bpp should be programmed double the target bpp
* restricting our target bpp to be 31.9375 at max
*/
if (pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
dsc_max_output_bpp = min_t(u16, dsc_max_output_bpp, 31 << 4);
if (!dsc_max_output_bpp) {
drm_dbg_kms(&dev_priv->drm,
"Compressed BPP not supported\n");