diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 2eab591a8ef5..491a804c1f6a 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -96,11 +96,6 @@ #include "intel_vdsc.h" #include "intel_vrr.h" -/* DP DSC throughput values used for slice count calculations KPixels/s */ -#define DP_DSC_PEAK_PIXEL_RATE 2720000 -#define DP_DSC_MAX_ENC_THROUGHPUT_0 340000 -#define DP_DSC_MAX_ENC_THROUGHPUT_1 400000 - /* Max DSC line buffer depth supported by HW. */ #define INTEL_DP_DSC_MAX_LINE_BUF_DEPTH 13 @@ -1018,13 +1013,29 @@ u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector, struct intel_display *display = to_intel_display(connector); u8 min_slice_count, i; int max_slice_width; + int tp_rgb_yuv444; + int tp_yuv422_420; - if (mode_clock <= DP_DSC_PEAK_PIXEL_RATE) - min_slice_count = DIV_ROUND_UP(mode_clock, - DP_DSC_MAX_ENC_THROUGHPUT_0); - else - min_slice_count = DIV_ROUND_UP(mode_clock, - DP_DSC_MAX_ENC_THROUGHPUT_1); + /* + * TODO: Pass the total pixel rate of all the streams transferred to + * an MST tiled display, calculate the total slice count for all tiles + * from this and the per-tile slice count from the total slice count. + */ + tp_rgb_yuv444 = drm_dp_dsc_sink_max_slice_throughput(connector->dp.dsc_dpcd, + mode_clock, true); + tp_yuv422_420 = drm_dp_dsc_sink_max_slice_throughput(connector->dp.dsc_dpcd, + mode_clock, false); + + /* + * TODO: Use the throughput value specific to the actual RGB/YUV + * format of the output. + * For now use the smaller of these, which is ok, potentially + * resulting in a higher than required minimum slice count. + * The RGB/YUV444 throughput value should be always either equal + * or smaller than the YUV422/420 value, but let's not depend on + * this assumption. + */ + min_slice_count = DIV_ROUND_UP(mode_clock, min(tp_rgb_yuv444, tp_yuv422_420)); /* * Due to some DSC engine BW limitations, we need to enable second