[SRU][Q][PATCH 1/9] drm/i915/dsc: Add helper to enable the DSC configuration for a CRTC

[AceLan Kao]

From: Imre Deak <imre.deak at intel.com>

BugLink: https://bugs.launchpad.net/bugs/2131066

Add a helper to enable the DSC compression configuration for a CRTC.
Follow-up changes will introduce tracking for the same DSC state on the
whole link, which will need to be set whenever DSC is enabled for the
CRTC. Also, according to the above, when querying the DSC state on the
link, both the CRTC's and the link's DSC state must be considered.

Setting the DSC configuration for a CRTC and querying the DSC
configuration for the link (added by follow-up changes) is better done
via helper functions based on the above, prepare for that here.

Signed-off-by: Imre Deak <imre.deak at intel.com>
Reviewed-by: Jouni Högander <jouni.hogander at intel.com>
Link: https://lore.kernel.org/r/20251015161934.262108-2-imre.deak@intel.com
(cherry picked from commit c88e70dc8bfca9a2be74a100387b1b66de973128)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>
---
 drivers/gpu/drm/i915/display/icl_dsi.c    | 2 +-
 drivers/gpu/drm/i915/display/intel_dp.c   | 3 ++-
 drivers/gpu/drm/i915/display/intel_vdsc.c | 5 +++++
 drivers/gpu/drm/i915/display/intel_vdsc.h | 1 +
 4 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 8d9cb73a93a7d..af001c0507998 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1630,7 +1630,7 @@ static int gen11_dsi_dsc_compute_config(struct intel_encoder *encoder,
 	if (ret)
 		return ret;
 
-	crtc_state->dsc.compression_enable = true;
+	intel_dsc_enable_on_crtc(crtc_state);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 7976fec886067..0fb406811bb53 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2448,7 +2448,8 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
 		return ret;
 	}
 
-	pipe_config->dsc.compression_enable = true;
+	intel_dsc_enable_on_crtc(pipe_config);
+
 	drm_dbg_kms(display->drm, "DP DSC computed with Input Bpp = %d "
 		    "Compressed Bpp = " FXP_Q4_FMT " Slice Count = %d\n",
 		    pipe_config->pipe_bpp,
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 8e799e225af17..64a1e9f0a1893 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -372,6 +372,11 @@ int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
 	return 0;
 }
 
+void intel_dsc_enable_on_crtc(struct intel_crtc_state *crtc_state)
+{
+	crtc_state->dsc.compression_enable = true;
+}
+
 enum intel_display_power_domain
 intel_dsc_power_domain(struct intel_crtc *crtc, enum transcoder cpu_transcoder)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.h b/drivers/gpu/drm/i915/display/intel_vdsc.h
index 9e2812f99dd74..240bef82d3576 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.h
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.h
@@ -20,6 +20,7 @@ void intel_uncompressed_joiner_enable(const struct intel_crtc_state *crtc_state)
 void intel_dsc_enable(const struct intel_crtc_state *crtc_state);
 void intel_dsc_disable(const struct intel_crtc_state *crtc_state);
 int intel_dsc_compute_params(struct intel_crtc_state *pipe_config);
+void intel_dsc_enable_on_crtc(struct intel_crtc_state *crtc_state);
 void intel_dsc_get_config(struct intel_crtc_state *crtc_state);
 enum intel_display_power_domain
 intel_dsc_power_domain(struct intel_crtc *crtc, enum transcoder cpu_transcoder);
-- 
2.43.0