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drm/dp: Add DP_HBLANK_EXPANSION_CAPABLE and DSC_PASSTHROUGH_EN DPCD flags

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Add the DPCD flag to enable DSC passthrough in a last branch device,
used in a follow-up i915 patch.

Also add a flag to detect HBLANK expansion support in a branch device,
used by a workaround in a follow-up i915 patch.

Cc: Lyude Paul <lyude@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231030155843.2251023-8-imre.deak@intel.com
This commit is contained in:
Imre Deak 2023-10-24 04:09:02 +03:00
parent 6f1aa39d64
commit b348150406
1 changed files with 2 additions and 0 deletions
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2
include/drm/display/drm_dp.h
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@ -148,6 +148,7 @@
#define DP_RECEIVE_PORT_0_CAP_0 0x008
# define DP_LOCAL_EDID_PRESENT (1 << 1)
# define DP_ASSOCIATED_TO_PRECEDING_PORT (1 << 2)
# define DP_HBLANK_EXPANSION_CAPABLE (1 << 3)
#define DP_RECEIVE_PORT_0_BUFFER_SIZE 0x009
@ -699,6 +700,7 @@
#define DP_DSC_ENABLE 0x160 /* DP 1.4 */
# define DP_DECOMPRESSION_EN (1 << 0)
# define DP_DSC_PASSTHROUGH_EN (1 << 1)
#define DP_DSC_CONFIGURATION 0x161 /* DP 2.0 */
#define DP_PSR_EN_CFG 0x170 /* XXX 1.2? */