tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
1
fork

Configure Feed

Select the types of activity you want to include in your feed.

drm/display: Add missing Adaptive Sync DPCD definitions

The missing DPCD definitions from DP2.0 spec is as follows:

DOWNSPREAD_CTRL (107h):
FIXED_VTOTAL_AS_SDP_EN_IN_PR_ACTIVE (bit 6)
For sink devices that support Adaptive-Sync operation
and Panel Replay

DPRX_FEATURE_ENUMERATION_LIST_CONT_1 (2214h):
ADAPTIVE_SYNC_SDP_SUPPORTED (bit 0)
Bit to check sink device has Adaptive-Sync capability
AS_SDP_FIRST_HALF_LINE_OR_3840_PIXEL_CYCLE_WINDOW_NOT_SUPPORTED (bit 1)
A sink device that clears this bit will generate VSync pulse
leading edge of the HDMI output on the line count at which
Adaptive-Sync SDP is received as long as source device transmits
Adaptive-Sync SDP either in first line or first 3840 pixel cycles
of the line whichever occurs first.
VSC_EXT_SDP_FRAMEWORK_VERSION_1_SUPPORTED (bit 4)
Bit to check sink device has SDP framework version 1 capability

Signed-off-by: Sung Joon Kim <Sungjoon.Kim@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

authored by

Sung Joon Kim and committed by
Alex Deucher 50371be6 09ccde91

+6
+6
include/drm/display/drm_dp.h
··· 603 603 604 604 #define DP_DOWNSPREAD_CTRL 0x107 605 605 # define DP_SPREAD_AMP_0_5 (1 << 4) 606 + # define DP_FIXED_VTOTAL_AS_SDP_EN_IN_PR_ACTIVE (1 << 6) 606 607 # define DP_MSA_TIMING_PAR_IGNORE_EN (1 << 7) /* eDP */ 607 608 608 609 #define DP_MAIN_LINK_CHANNEL_CODING_SET 0x108 ··· 1105 1104 # define DP_VSC_EXT_VESA_SDP_CHAINING_SUPPORTED (1 << 5) /* DP 1.4 */ 1106 1105 # define DP_VSC_EXT_CEA_SDP_SUPPORTED (1 << 6) /* DP 1.4 */ 1107 1106 # define DP_VSC_EXT_CEA_SDP_CHAINING_SUPPORTED (1 << 7) /* DP 1.4 */ 1107 + 1108 + #define DP_DPRX_FEATURE_ENUMERATION_LIST_CONT_1 0x2214 /* 2.0 E11 */ 1109 + # define DP_ADAPTIVE_SYNC_SDP_SUPPORTED (1 << 0) 1110 + # define DP_AS_SDP_FIRST_HALF_LINE_OR_3840_PIXEL_CYCLE_WINDOW_NOT_SUPPORTED (1 << 1) 1111 + # define DP_VSC_EXT_SDP_FRAMEWORK_VERSION_1_SUPPORTED (1 << 4) 1108 1112 1109 1113 #define DP_128B132B_SUPPORTED_LINK_RATES 0x2215 /* 2.0 */ 1110 1114 # define DP_UHBR10 (1 << 0)