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drm/i915/dp_mst: Use output_format to get the final link bpp

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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@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230817142459.89764-4-ankit.k.nautiyal@intel.com
This commit is contained in:
Ankit Nautiyal 2023-08-17 19:54:44 +05:30
parent 3a4b4809c8
commit fd279d21ed
3 changed files with 6 additions and 2 deletions
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2
drivers/gpu/drm/i915/display/intel_dp.c
View File

@ -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

1
drivers/gpu/drm/i915/display/intel_dp.h
View File

@ -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__ */

5
drivers/gpu/drm/i915/display/intel_dp_mst.c
View File

@ -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,