The final link bpp used to calculate the m_n values depend on the
output_format. Though the output_format is set to RGB for MST case and
the link bpp will be same as the pipe bpp, for the sake of semantics,
lets calculate the m_n values with the link bpp, instead of pipe_bpp.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 2 +-
drivers/gpu/drm/i915/display/intel_dp.h | 1 +
drivers/gpu/drm/i915/display/intel_dp_mst.c | 5 ++++-
3 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index d1db457fb17c..eb158efdb414 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -965,7 +965,7 @@ int intel_dp_min_bpp(enum intel_output_format output_format)
return 8 * 3;
}
-static int intel_dp_output_bpp(enum intel_output_format output_format, int bpp)
+int intel_dp_output_bpp(enum intel_output_format output_format, int bpp)
{
/*
* bpp value was assumed to RGB format. And YCbCr 4:2:0 output
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index bb4f976af296..7dd015385054 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -144,5 +144,6 @@ void intel_dp_pcon_dsc_configure(struct intel_dp *intel_dp,
void intel_dp_phy_test(struct intel_encoder *encoder);
void intel_dp_wait_source_oui(struct intel_dp *intel_dp);
+int intel_dp_output_bpp(enum intel_output_format output_format, int bpp);
#endif /* __INTEL_DP_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index aa8d9d570626..ef5375eb923e 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -155,6 +155,7 @@ static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
const struct drm_display_mode *adjusted_mode =
&crtc_state->hw.adjusted_mode;
int slots = -EINVAL;
+ int link_bpp;
slots = intel_dp_mst_find_vcpi_slots_for_bpp(encoder, crtc_state, limits->max_bpp,
limits->min_bpp, limits,
@@ -163,7 +164,9 @@ static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
if (slots < 0)
return slots;
- intel_link_compute_m_n(crtc_state->pipe_bpp,
+ link_bpp = intel_dp_output_bpp(crtc_state->output_format, crtc_state->pipe_bpp);
+
+ intel_link_compute_m_n(link_bpp,
crtc_state->lane_count,
adjusted_mode->crtc_clock,
crtc_state->port_clock,
--
2.40.1
