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drm/i915/dp: Factor out intel_dp_dsc_min_slice_count()

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Factor out intel_dp_dsc_min_slice_count() for making
intel_dp_dsc_get_slice_count() more readable and also to prepare for a
follow-up change unifying the eDP and DP slice count/config computation.

Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260114162232.92731-8-imre.deak@intel.com
This commit is contained in:
Imre Deak 2026-01-14 18:22:24 +02:00
parent e941eb1078
commit 15f908bce5
1 changed files with 17 additions and 6 deletions
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23
drivers/gpu/drm/i915/display/intel_dp.c
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@ -959,14 +959,11 @@ u32 get_max_compressed_bpp_with_joiner(struct intel_display *display,
return max_bpp;
}
u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector,
int mode_clock, int mode_hdisplay,
int num_joined_pipes)
static int intel_dp_dsc_min_slice_count(const struct intel_connector *connector,
int mode_clock, int mode_hdisplay)
{
struct intel_display *display = to_intel_display(connector);
u32 sink_slice_count_mask =
drm_dp_dsc_sink_slice_count_mask(connector->dp.dsc_dpcd, false);
u8 min_slice_count, i;
u8 min_slice_count;
int max_slice_width;
int tp_rgb_yuv444;
int tp_yuv422_420;
@ -1025,6 +1022,20 @@ u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector,
DIV_ROUND_UP(mode_hdisplay,
max_slice_width));
return min_slice_count;
}
u8 intel_dp_dsc_get_slice_count(const struct intel_connector *connector,
int mode_clock, int mode_hdisplay,
int num_joined_pipes)
{
struct intel_display *display = to_intel_display(connector);
int min_slice_count =
intel_dp_dsc_min_slice_count(connector, mode_clock, mode_hdisplay);
u32 sink_slice_count_mask =
drm_dp_dsc_sink_slice_count_mask(connector->dp.dsc_dpcd, false);
int i;
/* Find the closest match to the valid slice count values */
for (i = 0; i < ARRAY_SIZE(valid_dsc_slicecount); i++) {
u8 test_slice_count = valid_dsc_slicecount[i] * num_joined_pipes;