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drm/i915/dsi: Track the detailed DSC slice configuration

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Add tracking for the DSI DSC pipes-per-line and slices-per-stream value
in the slice config state and compute the current slices-per-line value
using this slice config state. The slices-per-line value used atm will
be removed by a follow-up change after converting all the places using
it to use the detailed slice config instead.

Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260114162232.92731-5-imre.deak@intel.com
This commit is contained in:
Imre Deak 2026-01-14 18:22:21 +02:00
parent 611cadd5c0
commit 57152a502e
1 changed files with 8 additions and 3 deletions
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11
drivers/gpu/drm/i915/display/intel_bios.c
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@ -41,6 +41,7 @@
#include "intel_display_utils.h"
#include "intel_gmbus.h"
#include "intel_rom.h"
#include "intel_vdsc.h"
#define _INTEL_BIOS_PRIVATE
#include "intel_vbt_defs.h"
@ -3578,12 +3579,14 @@ static void fill_dsc(struct intel_crtc_state *crtc_state,
*
* FIXME: split only when necessary
*/
crtc_state->dsc.slice_config.pipes_per_line = 1;
if (dsc->slices_per_line & BIT(2)) {
crtc_state->dsc.slice_config.streams_per_pipe = 2;
crtc_state->dsc.slice_count = 4;
crtc_state->dsc.slice_config.slices_per_stream = 2;
} else if (dsc->slices_per_line & BIT(1)) {
crtc_state->dsc.slice_config.streams_per_pipe = 2;
crtc_state->dsc.slice_count = 2;
crtc_state->dsc.slice_config.slices_per_stream = 1;
} else {
/* FIXME */
if (!(dsc->slices_per_line & BIT(0)))
@ -3591,9 +3594,11 @@ static void fill_dsc(struct intel_crtc_state *crtc_state,
"VBT: Unsupported DSC slice count for DSI\n");
crtc_state->dsc.slice_config.streams_per_pipe = 1;
crtc_state->dsc.slice_count = 1;
crtc_state->dsc.slice_config.slices_per_stream = 1;
}
crtc_state->dsc.slice_count = intel_dsc_line_slice_count(&crtc_state->dsc.slice_config);
if (crtc_state->hw.adjusted_mode.crtc_hdisplay %
crtc_state->dsc.slice_count != 0)
drm_dbg_kms(display->drm,