[Intel-gfx] [PATCH 2/2] drm/i915/dsc/mtl: Enable alternate ICH method

Jani Nikula
2022-08-17T12:45:59Z

From: Vandita Kulkarni <vandita.kulkarni@intel.com>

DSC 1.2 is supported from MTL, hence program ICH accordingly.

Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
drivers/gpu/drm/i915/display/intel_vdsc.c | 2 ++
drivers/gpu/drm/i915/i915_reg.h | 1 +
2 files changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 43e1bbc1e303..ac4ba7ac85c6 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -597,6 +597,8 @@ static void intel_dsc_pps_configure(const struct intel_crtc_state *crtc_state)
DSC_VER_MIN_SHIFT |
vdsc_cfg->bits_per_component << DSC_BPC_SHIFT |
vdsc_cfg->line_buf_depth << DSC_LINE_BUF_DEPTH_SHIFT;
+ if (vdsc_cfg->dsc_version_minor == 2)
+ pps_val |= DSC_ALT_ICH_SEL;
if (vdsc_cfg->block_pred_enable)
pps_val |= DSC_BLOCK_PREDICTION;
if (vdsc_cfg->convert_rgb)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 50d7bfd541ad..2e3aa684cf1b 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -8003,6 +8003,7 @@ enum skl_power_gate {
#define ICL_DSC1_PICTURE_PARAMETER_SET_0(pipe) _MMIO_PIPE((pipe) - PIPE_B, \
_ICL_DSC1_PICTURE_PARAMETER_SET_0_PB, \
_ICL_DSC1_PICTURE_PARAMETER_SET_0_PC)
+#define DSC_ALT_ICH_SEL (1 << 20)
#define DSC_VBR_ENABLE (1 << 19)
#define DSC_422_ENABLE (1 << 18)
#define DSC_COLOR_SPACE_CONVERSION (1 << 17)
--
2.34.1