[PATCH 6/6] drm/i915/dp: Account for dsc bubbles overhead in intel_dp_mode_valid()

[Ankit Nautiyal]

Account for DSC bubble overhead to determine if the mode is ok if DSC is
required for given number of pipes joined.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c   | 4 ++++
 drivers/gpu/drm/i915/display/intel_vdsc.c | 1 -
 drivers/gpu/drm/i915/display/intel_vdsc.h | 2 ++
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 0acd86c7d1c2..e3f42ffb5739 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1542,6 +1542,10 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 					      &dsc_slice_count);
 
 			dsc = dsc_max_compressed_bpp && dsc_slice_count;
+
+			target_clock = intel_dsc_get_pixel_rate_with_dsc_bubbles(target_clock,
+										 mode->htotal,
+										 dsc_slice_count);
 		}
 
 		if (intel_dp_joiner_needs_dsc(display, num_joined_pipes) && !dsc) {
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 7513cecdeaf3..494a46760443 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -1034,7 +1034,6 @@ void intel_vdsc_state_dump(struct drm_printer *p, int indent,
 	drm_dsc_dump_config(p, indent, &crtc_state->dsc.config);
 }
 
-static
 int intel_dsc_get_pixel_rate_with_dsc_bubbles(int pixel_rate, int htotal,
 					      int dsc_horizontal_slices)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.h b/drivers/gpu/drm/i915/display/intel_vdsc.h
index 9e2812f99dd7..b86230039597 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.h
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.h
@@ -32,5 +32,7 @@ void intel_dsc_dp_pps_write(struct intel_encoder *encoder,
 void intel_vdsc_state_dump(struct drm_printer *p, int indent,
 			   const struct intel_crtc_state *crtc_state);
 int intel_vdsc_min_cdclk(const struct intel_crtc_state *crtc_state);
+int intel_dsc_get_pixel_rate_with_dsc_bubbles(int pixel_rate, int htotal,
+					      int dsc_horizontal_slices);
 
 #endif /* __INTEL_VDSC_H__ */
-- 
2.45.2