drm/i915/dp: Move force_dsc_fractional_bpp_en check to intel_dp_dsc_valid_bpp()

Add the fractional DSC BPP force check to intel_dp_dsc_valid_bpp(), and
use that in xelpd_dsc_compute_link_config(). This is another step closer
towards unifying the platform specific functions.

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/2d8cdfef422dc2229d3ead2201bff4a321cbbdd3.1738327620.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index a299b69309dc60710b8a493e44b9a1ea604a7e79..2feb686f6419425da920e09f8c2b3b992a3a5149 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2075,8 +2075,12 @@ static bool intel_dp_dsc_valid_bpp(struct intel_dp *intel_dp, int bpp_x16)
        struct intel_display *display = to_intel_display(intel_dp);
        int i;
 
-       if (DISPLAY_VER(display) >= 13)
+       if (DISPLAY_VER(display) >= 13) {
+               if (intel_dp->force_dsc_fractional_bpp_en && !fxp_q4_to_frac(bpp_x16))
+                       return false;
+
                return true;
+       }
 
        if (fxp_q4_to_frac(bpp_x16))
                return false;
@@ -2143,9 +2147,9 @@ xelpd_dsc_compute_link_config(struct intel_dp *intel_dp,
        int ret;
 
        for (bpp_x16 = max_bpp_x16; bpp_x16 >= min_bpp_x16; bpp_x16 -= bpp_step_x16) {
-               if (intel_dp->force_dsc_fractional_bpp_en &&
-                   !fxp_q4_to_frac(bpp_x16))
+               if (!intel_dp_dsc_valid_bpp(intel_dp, bpp_x16))
                        continue;
+
                ret = dsc_compute_link_config(intel_dp,
                                              pipe_config,
                                              limits,