From a67221b5eb8d59fb7e1f0df3ef9945b6a0f32cca Mon Sep 17 00:00:00 2001 From: Ankit Nautiyal Date: Fri, 31 Jan 2025 09:43:42 +0530 Subject: [PATCH] drm/i915/dp: Return min bpc supported by source instead of 0 Currently, intel_dp_dsc_max_src_input_bpc can return 0 for platforms not supporting DSC, which could theoretically cause issues in clamp() due to a low limit being greater than the high limit. Instead, return the minimum bpc supported by the source to prevent such issues. Reported-by: Linux Kernel Functional Testing Closes: https://lore.kernel.org/all/CA+G9fYtNfM399_=_ff81zeRJv=0+z7oFJfPGmJgTp6yrJmU+1w@mail.gmail.com/ Fixes: 160672b86b0d ("drm/i915/dp: Use clamp for pipe_bpp limits with DSC") Cc: Suraj Kandpal Cc: Jani Nikula Cc: Rodrigo Vivi Signed-off-by: Ankit Nautiyal Reviewed-by: Suraj Kandpal Tested-by: Chaitanya Kumar Borah Link: https://patchwork.freedesktop.org/patch/msgid/20250131041342.3086716-1-ankit.k.nautiyal@intel.com Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/i915/display/intel_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 4fe274105c1d..00aba97631a9 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -1791,7 +1791,7 @@ int intel_dp_dsc_max_src_input_bpc(struct intel_display *display) if (DISPLAY_VER(display) == 11) return 10; - return 0; + return intel_dp_dsc_min_src_input_bpc(); } int intel_dp_dsc_compute_max_bpp(const struct intel_connector *connector, -- 2.25.1