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drm/i915/dp: Factor out align_max_sink_dsc_input_bpp()

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Factor out align_max_sink_dsc_input_bpp(), also used later for computing
the maximum DSC input BPP limit.

Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20251222153547.713360-4-imre.deak@intel.com
This commit is contained in:
Imre Deak 2025-12-22 17:35:30 +02:00
parent 7427f30e5c
commit 85b4360d2b
1 changed files with 18 additions and 10 deletions
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28
drivers/gpu/drm/i915/display/intel_dp.c
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@ -1894,12 +1894,27 @@ int intel_dp_dsc_max_src_input_bpc(struct intel_display *display)
return intel_dp_dsc_min_src_input_bpc();
}
static int align_max_sink_dsc_input_bpp(const struct intel_connector *connector,
int max_pipe_bpp)
{
u8 dsc_bpc[3];
int num_bpc;
int i;
num_bpc = drm_dp_dsc_sink_supported_input_bpcs(connector->dp.dsc_dpcd,
dsc_bpc);
for (i = 0; i < num_bpc; i++) {
if (dsc_bpc[i] * 3 <= max_pipe_bpp)
return dsc_bpc[i] * 3;
}
return 0;
}
int intel_dp_dsc_compute_max_bpp(const struct intel_connector *connector,
u8 max_req_bpc)
{
struct intel_display *display = to_intel_display(connector);
int i, num_bpc;
u8 dsc_bpc[3] = {};
int dsc_max_bpc;
dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
@ -1909,14 +1924,7 @@ int intel_dp_dsc_compute_max_bpp(const struct intel_connector *connector,
dsc_max_bpc = min(dsc_max_bpc, max_req_bpc);
num_bpc = drm_dp_dsc_sink_supported_input_bpcs(connector->dp.dsc_dpcd,
dsc_bpc);
for (i = 0; i < num_bpc; i++) {
if (dsc_max_bpc >= dsc_bpc[i])
return dsc_bpc[i] * 3;
}
return 0;
return align_max_sink_dsc_input_bpp(connector, dsc_max_bpc * 3);
}
static int intel_dp_source_dsc_version_minor(struct intel_display *display)