linux-kernel - [PATCH v7 0/9] drm/omap: Add virtual-planes support

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Message-Id: <20211117141928.771082-1-narmstrong@baylibre.com>
Date:   Wed, 17 Nov 2021 15:19:19 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     tomba@...nel.org
Cc:     linux-omap@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, khilman@...libre.com,
        Neil Armstrong <narmstrong@...libre.com>
Subject: [PATCH v7 0/9] drm/omap: Add virtual-planes support

This patchset is the follow-up the v4 patchset from Benoit Parrot at [1].

This patch series adds virtual-plane support to omapdrm driver to allow the use
of display wider than 2048 pixels.

In order to do so we introduce the concept of hw_overlay which can then be
dynamically allocated to a plane. When the requested output width exceed what
be supported by one overlay a second is then allocated if possible to handle
display wider then 2048.

This series replaces an earlier series which was DT based and using statically
allocated resources.

This implementation is inspired from the work done in msm/disp/mdp5
driver.

Changes since v6 at [3]:
- Patch 1: Added comment for drm_atomic_helper_check_plane_state, added Reviewed-by
- Patch 2: added Reviewed-by
- Patch 3: added Reviewed-by
- Patch 4: added Reviewed-by
- Patch 5: added Reviewed-by
- Patch 6: No changes
- Patch 7: No changes
- Patch 8: Reformatted omap_plane_atomic_print_state() output for overlays
- Patch 9: Added a comment of the utility of the local omap_atomic_update_normalize_zpos() + atomic_print_state() reformat

Changes since v5 at [2]:
- Patch 1: renamed width/height_fp to max_width/height
- Patch 2: no changes
- Patch 3: removed possible_crtcs stuff,
	added cleanup on failure to allocate,
	removed name in omap_plane struct & plane_id_to_name in omap_plane.c,
	switched all omap_plane->name to plane->name or omap_plane->id
- Patch 4: aligned omap_plane_atomic_duplicate_state the the crtc style
- Patch 5: removed glob_obj_lock & reformated global state declaration in omap_drv.h
- Patch 6: moved drm_atomic_helper_check_plane_state() from atomic_check() in separate commit,
	removed zpos change, updated debug messages to be useful,
	renamed omap_overlay_disable() to omap_overlay_update_state(),
	added useful comments for omap_overlay_assign() & omap_overlay_update_state(),
	simplified omap_overlay_assign() & omap_overlay_update_state() for actual use-cases,
	refactored omap_plane_atomic_check() changes to be cleaner & simpler
- Patch 7: no changes (except possible_crtcs print removal)
- Patch 8: Reformated omap_plane_atomic_check() & omap_overlay_assign() changes to match previous patches layout 

Changes since v4 at [1]:
- rebased on v5.15-rc2
- adapted to drm_atomic_get_new/old_plane_state()
- tested on Beagle-x15
- checked for non-regression on Beagle-x15
- removed unused "state" variable in omap_global_state

[1] https://lore.kernel.org/all/20181012201703.29065-1-bparrot@ti.com/
[2] https://lore.kernel.org/all/20210923070701.145377-1-narmstrong@baylibre.com/
[3] https://lore.kernel.org/all/20211018142842.2511200-1-narmstrong@baylibre.com

Benoit Parrot (8):
  drm/omap: Add ability to check if requested plane modes can be
    supported
  drm/omap: Add ovl checking funcs to dispc_ops
  drm/omap: introduce omap_hw_overlay
  drm/omap: omap_plane: subclass drm_plane_state
  drm/omap: Add global state as a private atomic object
  drm/omap: dynamically assign hw overlays to planes
  drm/omap: add plane_atomic_print_state support
  drm/omap: Add a 'right overlay' to plane state

Neil Armstrong (1):
  drm/omap: add sanity plane state check

 drivers/gpu/drm/omapdrm/Makefile       |   1 +
 drivers/gpu/drm/omapdrm/dss/dispc.c    |  31 ++-
 drivers/gpu/drm/omapdrm/dss/dss.h      |   5 +
 drivers/gpu/drm/omapdrm/omap_drv.c     | 196 +++++++++++++-
 drivers/gpu/drm/omapdrm/omap_drv.h     |  24 ++
 drivers/gpu/drm/omapdrm/omap_fb.c      |  33 ++-
 drivers/gpu/drm/omapdrm/omap_fb.h      |   4 +-
 drivers/gpu/drm/omapdrm/omap_overlay.c | 212 +++++++++++++++
 drivers/gpu/drm/omapdrm/omap_overlay.h |  35 +++
 drivers/gpu/drm/omapdrm/omap_plane.c   | 349 +++++++++++++++++++++----
 drivers/gpu/drm/omapdrm/omap_plane.h   |   1 +
 11 files changed, 832 insertions(+), 59 deletions(-)
 create mode 100644 drivers/gpu/drm/omapdrm/omap_overlay.c
 create mode 100644 drivers/gpu/drm/omapdrm/omap_overlay.h


base-commit: 49c39ec4670a8f045729e3717af2e1a74caf89a5
-- 
2.25.1