[Intel-gfx] [v3 2/2] drm/i915/display/dsc: Set BPP in the kernel

[venkata.sai.patnana at intel.com]

From: Anusha Srivatsa <anusha.srivatsa at intel.com>

Set compress BPP in kernel while connector DP or eDP

Cc: Vandita Kulkarni <vandita.kulkarni at intel.com>
Cc: Navare Manasi D <manasi.d.navare at intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
Signed-off-by: Patnana Venkata Sai <venkata.sai.patnana at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 5b52beaddada0..4ce15da3e33ce 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1241,9 +1241,15 @@ static int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
 	pipe_config->lane_count = limits->max_lane_count;
 
 	if (intel_dp_is_edp(intel_dp)) {
-		pipe_config->dsc.compressed_bpp =
-			min_t(u16, drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4,
-			      pipe_config->pipe_bpp);
+		if (intel_dp->force_dsc_bpp) {
+			drm_dbg_kms(&dev_priv->drm,
+				"DSC BPP forced to %d", intel_dp->force_dsc_bpp);
+			pipe_config->dsc.compressed_bpp = intel_dp->force_dsc_bpp;
+		} else {
+			pipe_config->dsc.compressed_bpp =
+				min_t(u16, drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4,
+				pipe_config->pipe_bpp);
+		}
 		pipe_config->dsc.slice_count =
 			drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
 							true);
@@ -1269,9 +1275,15 @@ static int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
 				    "Compressed BPP/Slice Count not supported\n");
 			return -EINVAL;
 		}
-		pipe_config->dsc.compressed_bpp = min_t(u16,
+		if (intel_dp->force_dsc_bpp) {
+			drm_dbg_kms(&dev_priv->drm,
+				    "DSC BPP forced to %d\n", intel_dp->force_dsc_bpp);
+			pipe_config->dsc.compressed_bpp = intel_dp->force_dsc_bpp;
+		} else {
+			pipe_config->dsc.compressed_bpp = min_t(u16,
 							       dsc_max_output_bpp >> 4,
 							       pipe_config->pipe_bpp);
+		}
 		pipe_config->dsc.slice_count = dsc_dp_slice_count;
 	}
 	/*
@@ -1374,7 +1386,8 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
 	 * Pipe joiner needs compression upto display12 due to BW limitation. DG2
 	 * onwards pipe joiner can be enabled without compression.
 	 */
-	drm_dbg_kms(&i915->drm, "Force DSC en = %d\n", intel_dp->force_dsc_en);
+	drm_dbg_kms(&i915->drm, "Force DSC en = %d\n Force DSC BPP = %d\n",
+		    intel_dp->force_dsc_en, intel_dp->force_dsc_bpp);
 	if (ret || intel_dp->force_dsc_en || (DISPLAY_VER(i915) < 13 &&
 					      pipe_config->bigjoiner)) {
 		ret = intel_dp_dsc_compute_config(intel_dp, pipe_config,
-- 
2.25.1