linux-toradex.git/include/drm/drm_dsc.h, branch v5.17

Merge tag 'drm-intel-next-2021-01-04' of git://anongit.freedesktop.org/drm/drm-intel into drm-next

2021-01-07T11:20:29+00:00

- Display hotplug fix for gen2/gen3 (Chris)
- Remove trailing semicolon (Tom)
- Suppress display warnings for old ifwi presend on our CI (Chris)
- OA/Perf related workaround (Lionel)
- Replace I915_READ/WRITE per new uncore and display read/write functions (Jani)
- PSR improvements (Jose)
- HDR and other color changes on LSPCON (Uma, Ville)
- FBC fixes for TGL (Uma)
- Record plane update times for debugging (Chris)
- Refactor panel backlight control functions (Dave)
- Display power improvements (Imre)
- Add VRR register definition (Manasi)
- Atomic modeset improvements for bigjoiner pipes (Ville)
- Switch off the scanout during driver unregister (Chris)
- Clean-up DP's FEW enable (Manasi)
- Fix VDSCP slice count (Manasi)
- Fix and clean up around rc_model_size for DSC (Jani)
- Remove Type-C noisy debug warn message (Sean)
- Display HPD code clean-up (Ville)
- Refactor Intel Display (Dave)
- Start adding support for Intel's eDP backlight controls (Lyude)

Signed-off-by: Daniel Vetter 

From: Rodrigo Vivi 
Link: https://patchwork.freedesktop.org/patch/msgid/20210104211018.GA1094707@intel.com

drm/dsc: add helper for calculating rc buffer size from DPCD

2020-12-10T08:49:47+00:00

Add a helper for calculating the rc buffer size from the DCPD offsets
DP_DSC_RC_BUF_BLK_SIZE and DP_DSC_RC_BUF_SIZE.

Cc: Alex Deucher 
Cc: Harry Wentland 
Cc: Manasi Navare 
Cc: Vandita Kulkarni 
Reviewed-by: Vandita Kulkarni 
Acked-by: Daniel Vetter 
Signed-off-by: Jani Nikula 
Link: https://patchwork.freedesktop.org/patch/msgid/6c6aee22740fe7a8cf2b8e768bfda378850cf59a.1607429866.git.jani.nikula@intel.com

drm: fix some kernel-doc markups

2020-11-16T19:48:20+00:00

Some identifiers have different names between their prototypes
and the kernel-doc markup.

Others need to be fixed, as kernel-doc markups should use this format:
        identifier - description

Signed-off-by: Mauro Carvalho Chehab 
Acked-by: Jani Nikula 
Signed-off-by: Daniel Vetter 
Link: https://patchwork.freedesktop.org/patch/msgid/12d4ca26f6843618200529ce5445063734d38c04.1605521731.git.mchehab+huawei@kernel.org

drm: drm_dsc.h: fix a kernel-doc markup

2020-09-30T14:40:44+00:00

As warned by Sphinx:

	./Documentation/gpu/drm-kms-helpers:305: ./include/drm/drm_dsc.h:587: WARNING: Unparseable C cross-reference: 'struct'
	Invalid C declaration: Expected identifier in nested name, got keyword: struct [error at 6]
	  struct
	  ------^

The markup for one struct is wrong, as struct is used twice.

Signed-off-by: Mauro Carvalho Chehab 
Signed-off-by: Daniel Vetter 
Link: https://patchwork.freedesktop.org/patch/msgid/3d467022325e15bba8dcb13da8fb730099303266.1601467849.git.mchehab+huawei@kernel.org

drm/dsc: Split DSC PPS and SDP header initialisations

2019-03-05T18:24:34+00:00

The DP 1.4 spec defines the SDP header and SDP contents for
a Picture Parameter Set (PPS) that must be sent in advance
of DSC transmission to define the encoding characteristics.

This was done in one struct, drm_dsc_pps_infoframe, which
conatined the SDP header and PPS.  Because the PPS is
a property of DSC over any connector, not just DP, and because
drm drivers may have their own SDP structs they wish to use,
make the functions that initialise SDP and PPS headers take
the components they operate on, not drm_dsc_pps_infoframe,

Signed-off-by: David Francis 
Reviewed-by: Manasi Navare 
Signed-off-by: Harry Wentland 
Link: https://patchwork.freedesktop.org/patch/msgid/20190221202001.28430-4-David.Francis@amd.com

drm/dsc: Add native 420 and 422 support to compute_rc_params

2019-03-05T18:24:33+00:00

Native 420 and 422 transfer modes are new in DSC1.2

In these modes, each two pixels of a slice are treated as one
pixel, so the slice width is half as large (round down) for
the purposes of calucating the groups per line and chunk size
in bytes

In native 422 mode, each pixel has four components, so the
mux component of a group is larger by one additional mux word
and one additional component

Now that there is native 422 support, the configuration option
previously called enable422 is renamed to simple_422 to avoid
confusion

Acked-by: Jani Nikula 
Reviewed-by: Manasi Navare 
Reviewed-by: Harry Wentland 
Signed-off-by: David Francis 
Signed-off-by: Harry Wentland 
Link: https://patchwork.freedesktop.org/patch/msgid/20190221202001.28430-3-David.Francis@amd.com

drm/i915: Move dsc rate params compute into drm

2019-03-05T18:24:31+00:00

The function intel_compute_rc_parameters is part of the dsc spec
and is not driver-specific. Other drm drivers might like to use
it.  The function is not changed; just moved and renamed.

Reviewed-by: Harry Wentland 
Signed-off-by: David Francis 
Signed-off-by: Harry Wentland 
Link: https://patchwork.freedesktop.org/patch/msgid/20190221202001.28430-2-David.Francis@amd.com

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

2019-02-08T21:38:51+00:00

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 
Suggested-by: Sean Paul 
Cc: Daniel Vetter 
Cc: Sean Paul 
Signed-off-by: Manasi Navare 
Acked-by: Sean Paul 
Reviewed-by: Daniel Vetter 
Link: https://patchwork.freedesktop.org/patch/msgid/20190206213148.21390-1-manasi.d.navare@intel.com

drm/dsc: Define the DSC 1.1 and 1.2 Line Buffer depth constants

2018-11-28T02:36:17+00:00

DSC specification defines linebuf_depth which contains the
line buffer bit depth used to generate the bitstream.
These values are defined as per Table 4.1 in DSC 1.2 spec

v2 (From Manasi):
* Rename as MAX_LINEBUF_DEPTH for DSC 1.1 and DSC 1.2

Cc: dri-devel@lists.freedesktop.org
Cc: Jani Nikula 
Cc: Ville Syrjälä 
Signed-off-by: Gaurav K Singh 
Signed-off-by: Manasi Navare 
Acked-by: Sean Paul  (For merging through
drm-intel)
Reviewed-by: Anusha Srivatsa 
Link: https://patchwork.freedesktop.org/patch/msgid/20181127214125.17658-6-manasi.d.navare@intel.com

drm/dsc: Add helpers for DSC picture parameter set infoframes

2018-11-28T02:35:17+00:00

According to Display Stream compression spec 1.2, the picture
parameter set metadata is sent from source to sink device
using the DP Secondary data packet. An infoframe is formed
for the PPS SDP header and PPS SDP payload bytes.
This patch adds helpers to fill the PPS SDP header
and PPS SDP payload according to the DSC 1.2 specification.

v7:
* Use BUILD_BUG_ON() to protect changing struct size (Ville)
* Remove typecaseting (Ville)
* Include byteorder.h in drm_dsc.c (Ville)
* Correct kernel doc spacing (Anusha)
v6:
* Use proper sequence points for breaking down the
assignments (Chris Wilson)
* Use SPDX identifier
v5:
Do not use bitfields for DRM structs (Jani N)
v4:
* Use DSC constants for params that dont change across
configurations
v3:
* Add reference to added kernel-docs in
Documentation/gpu/drm-kms-helpers.rst (Daniel Vetter)

v2:
* Add EXPORT_SYMBOL for the drm functions (Manasi)

Cc: dri-devel@lists.freedesktop.org
Cc: Jani Nikula 
Cc: Ville Syrjala 
Cc: Anusha Srivatsa 
Cc: Harry Wentland 
Signed-off-by: Manasi Navare 
Acked-by: Harry Wentland 
Reviewed-by: Anusha Srivatsa 
Acked-by: Sean Paul  (For merging through
drm-intel)
Link: https://patchwork.freedesktop.org/patch/msgid/20181127214125.17658-5-manasi.d.navare@intel.com