[Intel-gfx] [PATCH v6 28/28] drm/i915/dsc: Force DSC enable if requested by IGT/userspace

[Manasi Navare]

Currently the driver will only enable DSC if a certain mode
does not fit the available link BW. However IGT/userspace
can force DSC enable through dsc support debugfs node to
test the DSC functionality if supported by the panel.

Cc: Jani Nikula <jani.nikula at linux.intel.com>
Cc: Ville Syrjala <ville.syrjala at linux.intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare at intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 0b5939992c2b..3df73f18212e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2188,12 +2188,13 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
 							&limits);
 
 	/* enable compression if the mode doesn't fit available BW */
-	if (!ret) {
-		DRM_DEBUG_KMS("DP required Link rate %i does not fit available %i\n",
-			      intel_dp_link_required(adjusted_mode->crtc_clock,
-						     pipe_config->pipe_bpp),
-			      intel_dp_max_data_rate(pipe_config->port_clock,
-						     pipe_config->lane_count));
+	if (!ret || intel_dp->force_dsc_en) {
+		if (!ret)
+			DRM_DEBUG_KMS("DP required Link rate %i does not fit available %i\n",
+				      intel_dp_link_required(adjusted_mode->crtc_clock,
+							     pipe_config->pipe_bpp),
+				      intel_dp_max_data_rate(pipe_config->port_clock,
+							     pipe_config->lane_count));
 
 		if (!intel_dp_dsc_compute_config(intel_dp, pipe_config,
 						 &limits))
-- 
2.18.0