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drm/dsc: Add kernel documentation for DRM DP DSC helpers

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This patch adds appropriate kernel documentation for DRM DP helpers
used for enabling Display Stream compression functionality in
drm_dp_helper.h and drm_dp_helper.c as well as for the DSC spec
related structure definitions and helpers in drm_dsc.c and drm_dsc.h
Also add links between the functions and structures in the documentation.

v3:
* Fix the checkpatch warnings (Sean Paul)
v2:
* Add inline comments for longer structs (Daniel Vetter)
* Split the summary and description (Daniel Vetter)

Suggested-by: Daniel Vetter <daniel.vetter@intel.com>
Suggested-by: Sean Paul <sean@poorly.run>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Sean Paul <sean@poorly.run>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Acked-by: Sean Paul <sean@poorly.run>
Reviewed-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190206213148.21390-1-manasi.d.navare@intel.com
This commit is contained in:
Manasi Navare
2019-02-06 13:31:48 -08:00
parent 05f8bc82fc
commit 05bad2357a
4 changed files with 259 additions and 66 deletions
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15
include/drm/drm_dp_helper.h
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@@ -1052,11 +1052,18 @@ int drm_dp_bw_code_to_link_rate(u8 link_bw);
#define DP_SDP_VSC_EXT_CEA 0x21 /* DP 1.4 */
/* 0x80+ CEA-861 infoframe types */
/**
* struct dp_sdp_header - DP secondary data packet header
* @HB0: Secondary Data Packet ID
* @HB1: Secondary Data Packet Type
* @HB2: Secondary Data Packet Specific header, Byte 0
* @HB3: Secondary Data packet Specific header, Byte 1
*/
struct dp_sdp_header {
u8 HB0; /* Secondary Data Packet ID */
u8 HB1; /* Secondary Data Packet Type */
u8 HB2; /* Secondary Data Packet Specific header, Byte 0 */
u8 HB3; /* Secondary Data packet Specific header, Byte 1 */
u8 HB0;
u8 HB1;
u8 HB2;
u8 HB3;
} __packed;
#define EDP_SDP_HEADER_REVISION_MASK 0x1F