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> From: Suraj Kandpal mailto:[email protected]
> To: mailto:[email protected],
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> Subject: [PATCH] drm/i915/vdsc: Use the DSC config tables for DSI panels
> Date: Thu, 27 Feb 2025 16:56:54 +0530
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> Some DSI panel vendors end up hardcoding PPS params because of which
> it does not listen to the params sent from the source. We use the
> default config tables for DSI panels when using DSC 1.1 rather than
> calculate our own rc parameters.
>
> --v2
> -Use intel_crtc_has_type [Jani]
>
> --v3
> -Add Signed-off-by from William too [Ankit]
>
> Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13719
> Signed-off-by: Suraj Kandpal mailto:[email protected]
> Signed-off-by: William Tseng mailto:[email protected]
> ---
> drivers/gpu/drm/i915/display/intel_vdsc.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c
> b/drivers/gpu/drm/i915/display/intel_vdsc.c
> index 6e7151346382..affe9913f1ee 100644
> --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
> +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
> @@ -320,7 +320,9 @@ int intel_dsc_compute_params(struct intel_crtc_state
> *pipe_config)
> * upto uncompressed bpp-1, hence add calculations for all the rc
> * parameters
> */
> - if (DISPLAY_VER(dev_priv) >= 13) {
> + if (DISPLAY_VER(dev_priv) >= 13 &&
Please change to "if (DISPLAY_VER(dev_priv) >= 14 &&" because MTL begins to
support DSC 1.2a according bspec 49259.
> + (vdsc_cfg->dsc_version_minor != 1 ||
> + intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))) {
> calculate_rc_params(vdsc_cfg);
> } else {
> if ((compressed_bpp == 8 ||
> --
> 2.34.1
