111 lines
4.6 KiB
Plaintext
Executable file
111 lines
4.6 KiB
Plaintext
Executable file
===============================================================================
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TODOs
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===============================================================================
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1. Base this on drm-next - WIP
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2. Cleanup commit history
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3. WIP - Drop page flip helper and use DRM's version
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4. DONE - Flatten all DC objects
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* dc_stream/core_stream/stream should just be dc_stream
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* Same for other DC objects
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"Is there any major reason to keep all those abstractions?
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Could you collapse everything into struct dc_stream?
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I haven't looked recently but I didn't get the impression there was a
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lot of design around what was public/protected, more whatever needed
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to be used by someone else was in public."
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~ Dave Airlie
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5. DONE - Rename DC objects to align more with DRM
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* dc_surface -> dc_plane_state
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* dc_stream -> dc_stream_state
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6. DONE - Per-plane and per-stream validation
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7. WIP - Per-plane and per-stream commit
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8. WIP - Split pipe_ctx into plane and stream resource structs
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9. Attach plane and stream reources to state object instead of validate_context
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10. Remove dc_edid_caps and drm_helpers_parse_edid_caps
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* Use drm_display_info instead
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* Remove DC's edid quirks and rely on DRM's quirks (add quirks if needed)
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"Making sure you use the sink-specific helper libraries and kernel
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subsystems, since there's really no good reason to have 2nd
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implementation of those in the kernel. Looks likes that's done for mst
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and edid parsing. There's still a bit a midlayer feeling to the edid
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parsing side (e.g. dc_edid_caps and dm_helpers_parse_edid_caps, I
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think it'd be much better if you convert that over to reading stuff
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from drm_display_info and if needed, push stuff into the core). Also,
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I can't come up with a good reason why DC needs all this (except to
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reimplement half of our edid quirk table, which really isn't a good
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idea). Might be good if you put this onto the list of things to fix
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long-term, but imo not a blocker. Definitely make sure new stuff
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doesn't slip in (i.e. if you start adding edid quirks to DC instead of
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the drm core, refactoring to use the core edid stuff was pointless)."
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~ Daniel Vetter
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11. Remove dc/i2caux. This folder can be somewhat misleading. It's basically an
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overy complicated HW programming function for sendind and receiving i2c/aux
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commands. We can greatly simplify that and move it into dc/dceXYZ like other
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HW blocks.
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12. drm_modeset_lock in MST should no longer be needed in recent kernels
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* Adopt appropriate locking scheme
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13. get_modes and best_encoder callbacks look a bit funny. Can probably rip out
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a few indirections, and consider removing entirely and using the
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drm_atomic_helper_best_encoder default behaviour.
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14. core/dc_debug.c, consider switching to the atomic state debug helpers and
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moving all your driver state printing into the various atomic_print_state
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callbacks. There's also plans to expose this stuff in a standard way across all
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drivers, to make debugging userspace compositors easier across different hw.
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15. Move DP/HDMI dual mode adaptors to drm_dp_dual_mode_helper.c. See
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dal_ddc_service_i2c_query_dp_dual_mode_adaptor.
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16. Move to core SCDC helpers (I think those are new since initial DC review).
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17. There's still a pretty massive layer cake around dp aux and DPCD handling,
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with like 3 levels of abstraction and using your own structures instead of the
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stuff in drm_dp_helper.h. drm_dp_helper.h isn't really great and already has 2
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incompatible styles, just means more reasons not to add a third (or well third
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one gets to do the cleanup refactor).
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18. There's a pile of sink handling code, both for DP and HDMI where I didn't
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immediately recognize the standard. I think long term it'd be best for the drm
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subsystem if we try to move as much of that into helpers/core as possible, and
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share it with drivers. But that's a very long term goal, and by far not just an
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issue with DC - other drivers, especially around DP sink handling, are equally
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guilty.
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19. DONE - The DC logger is still a rather sore thing, but I know that the
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DRM_DEBUG stuff just isn't up to the challenges either. We need to figure out
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something that integrates better with DRM and linux debug printing, while not
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being useless with filtering output. dynamic debug printing might be an option.
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20. Use kernel i2c device to program HDMI retimer. Some boards have an HDMI
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retimer that we need to program to pass PHY compliance. Currently that's
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bypassing the i2c device and goes directly to HW. This should be changed.
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21. Remove vector.c from dc/basics. It's used in DDC code which can probably
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be simplified enough to no longer need a vector implementation.
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