[Intel-gfx] [PATCH v5 28/28] drm/i915/dsc: Force DSC enable if requested by IGT/userspace

[Srivatsa, Anusha]

________________________________________
From: Navare, Manasi D
Sent: Friday, October 05, 2018 4:23 PM
To: intel-gfx at lists.freedesktop.org; dri-devel at lists.freedesktop.org
Cc: Navare, Manasi D; Jani Nikula; Ville Syrjala; Srivatsa, Anusha
Subject: [PATCH v5 28/28] drm/i915/dsc: Force DSC enable if requested by IGT/userspace

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 52dca5901aa1..987d3b2eb8d3 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2158,12 +2158,13 @@ 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