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drm/i915/vdsc: Add bpc check in intel_dsc_compute_params

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DSC does not support bpc under 8 according to DSC 1.2a Section 2
Requirements. Return an error if that happens to be the case.

--v2
-should be bit_per_component [Mitul/Chaitanya]
-Add reference to this restriction [Chaitanya]

--v3
-Add the bpc in which we see this warning [Jani]

Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240926081327.1409518-2-suraj.kandpal@intel.com
This commit is contained in:
Suraj Kandpal 2024-09-26 13:43:28 +05:30
parent df3859a4aa
commit 9572bdfeb1
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/i915/display/intel_vdsc.c
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@ -306,6 +306,12 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
vdsc_cfg->bits_per_component = pipe_config->pipe_bpp / 3;
if (vdsc_cfg->bits_per_component < 8) {
drm_dbg_kms(&dev_priv->drm, "DSC bpc requirements not met bpc: %d\n",
vdsc_cfg->bits_per_component);
return -EINVAL;
}
drm_dsc_set_rc_buf_thresh(vdsc_cfg);
/*