linux-dev/drivers/gpu/drm/drm_dsc.c, branch linus/master

drm/display: Move DSC header and helpers into display-helper module

2022-04-25T09:19:36Z

DSC is the Display Stream Compression standard for DisplayPort. Move the DSC code into display/ and split the header into files for protocol core and DRM helpers. Adapt all users of the code. No functional changes. To avoid the proliferation of Kconfig options, DSC is part of DRM's support for DisplayPort. If necessary, a new option could make DSC an independent feature. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20220421073108.19226-6-tzimmermann@suse.de

drm: Rename dp/ to display/

2022-04-25T09:17:45Z

Rename dp/ to display/ to account for additional display-related helpers, such as HDMI. Update all related include statements. No functional changes. Various drivers, such as i915 and amdgpu, use similar naming scheme by putting code for video-output standards into a local display/ directory. The new directory's name is aligned with this convention. v2: * update commit message (Javier) Signed-off-by: Thomas Zimmermann Reviewed-by: Lyude Paul Reviewed-by: Javier Martinez Canillas Reviewed-by: Alex Deucher Link: https://patchwork.freedesktop.org/patch/msgid/20220421073108.19226-3-tzimmermann@suse.de

drm/dp: Move public DisplayPort headers into dp/

2022-01-17T10:25:44Z

Move all public DisplayPort headers into dp/ and update users. No functional changes. v3: * rebased onto latest drm-tip Signed-off-by: Thomas Zimmermann Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20220114114535.29157-5-tzimmermann@suse.de

drm: Fix typo in comments

2021-08-02T08:19:43Z

fix typo for drm v1->v2: respin with the change "iff ==> implies that" Signed-off-by: Cai Huoqing Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20210730132729.376-1-caihuoqing@baidu.com

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

2020-12-10T08:49:47Z

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/dsc: use rc_model_size from DSC config for PPS

2020-12-10T08:48:19Z

The PPS is supposed to reflect the DSC config instead of hard coding the rc_model_size. Make it so. Currently all users of drm_dsc_pps_payload_pack() hard code the size to 8192 also in the DSC config, so this change should have no impact, other than allowing the drivers to use other sizes as needed. 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/c3246aff585efcd728ee3dc96f52db5e46f6a162.1607429866.git.jani.nikula@intel.com

drm/dsc: Fix bogus cpu_to_be16() usage

2019-09-30T17:15:53Z

__be16 = cpu_to_be16(__be16) is nonsense. Do it right. ../drivers/gpu/drm/drm_dsc.c:218:53: warning: incorrect type in assignment (different base types) ../drivers/gpu/drm/drm_dsc.c:218:53: expected restricted __be16 ../drivers/gpu/drm/drm_dsc.c:218:53: got int ../drivers/gpu/drm/drm_dsc.c:225:25: warning: cast from restricted __be16 ../drivers/gpu/drm/drm_dsc.c:225:25: warning: incorrect type in argument 1 (different base types) ../drivers/gpu/drm/drm_dsc.c:225:25: expected unsigned short [usertype] val ../drivers/gpu/drm/drm_dsc.c:225:25: got restricted __be16 ../drivers/gpu/drm/drm_dsc.c:225:25: warning: cast from restricted __be16 ../drivers/gpu/drm/drm_dsc.c:225:25: warning: cast from restricted __be16 Cc: Manasi Navare Cc: David Francis Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190710125143.9965-2-ville.syrjala@linux.intel.com Reviewed-by: Sean Paul

drm: fix warnings in DSC

2019-09-16T13:14:44Z

Remove always false comparisons due to limited range of nfl_bpg_offset and scale_increment_interval fields. Warnings detected when compiling with W=1. Signed-off-by: Benjamin Gaignard Reviewed-by: Harry Wentland Signed-off-by: Benjamin Gaignard Link: https://patchwork.freedesktop.org/patch/msgid/20190911084759.6946-1-benjamin.gaignard@st.com

drm/dsc: Split DSC PPS and SDP header initialisations

2019-03-05T18:24:34Z

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

2019-03-05T18:24:33Z

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