linux-kernel - [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL

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Date:   Fri, 24 Sep 2021 08:43:07 +0200
From:   Fernando Ramos <greenfoo@....eu>
To:     dri-devel@...ts.freedesktop.org
Cc:     linux-kernel@...r.kernel.org, sean@...rly.run,
        linux-doc@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        linux-renesas-soc@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible

Hi all,

One of the things in the DRM TODO list ("Documentation/gpu/todo.rst") was to
"use DRM_MODESET_LOCAL_ALL_* helpers instead of boilerplate". That's what this
patch series is about.

You will find two types of changes here:

  - Replacing "drm_modeset_lock_all_ctx()" (and surrounding boilerplate) with
    "DRM_MODESET_LOCK_ALL_BEGIN()/END()" in the remaining places (as it has
    already been done in previous commits such as b7ea04d2)

  - Replacing "drm_modeset_lock_all()" with "DRM_MODESET_LOCK_ALL_BEGIN()/END()"
    in the remaining places (as it has already been done in previous commits
    such as 57037094)
    
Most of the changes are straight forward, except for a few cases in the "amd"
and "i915" drivers where some extra dancing was needed to overcome the
limitation that the DRM_MODESET_LOCK_ALL_BEGIN()/END() macros can only be used
once inside the same function (the reason being that the macro expansion
includes *labels*, and you can not have two labels named the same inside one
function)

Notice that, even after this patch series, some places remain where
"drm_modeset_lock_all()" and "drm_modeset_lock_all_ctx()" are still present,
all inside drm core (which makes sense), except for two (in "amd" and "i915")
which cannot be replaced due to the way they are being used.

Changes in v2:

  - Fix commit message typo
  - Use the value returned by DRM_MODESET_LOCK_ALL_END when possible
  - Split drm/i915 patch into two simpler ones
  - Remove drm_modeset_(un)lock_all()
  - Fix build problems in non-x86 platforms

Fernando Ramos (17):
  drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/msm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() drm/vmwgfx: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/shmobile: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/omapdrm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/msm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2
  drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm: cleanup: remove drm_modeset_(un)lock_all()
  doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup

 Documentation/gpu/todo.rst                    | 17 ----
 Documentation/locking/ww-mutex-design.rst     |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c   | 21 +++--
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 50 +++++-----
 .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 25 ++---
 drivers/gpu/drm/drm_client_modeset.c          | 14 ++-
 drivers/gpu/drm/drm_crtc_helper.c             | 18 ++--
 drivers/gpu/drm/drm_fb_helper.c               | 10 +-
 drivers/gpu/drm/drm_framebuffer.c             |  6 +-
 drivers/gpu/drm/drm_modeset_lock.c            | 94 +------------------
 drivers/gpu/drm/gma500/psb_device.c           | 18 ++--
 drivers/gpu/drm/i915/display/intel_audio.c    | 16 ++--
 drivers/gpu/drm/i915/display/intel_display.c  | 23 ++---
 .../drm/i915/display/intel_display_debugfs.c  | 46 +++++----
 drivers/gpu/drm/i915/display/intel_overlay.c  | 46 ++++-----
 drivers/gpu/drm/i915/display/intel_pipe_crc.c |  7 +-
 drivers/gpu/drm/i915/i915_drv.c               | 13 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c      | 10 +-
 .../gpu/drm/msm/disp/msm_disp_snapshot_util.c | 12 +--
 drivers/gpu/drm/nouveau/dispnv50/disp.c       | 15 ++-
 drivers/gpu/drm/omapdrm/omap_fb.c             |  9 +-
 drivers/gpu/drm/radeon/radeon_device.c        | 21 +++--
 drivers/gpu/drm/radeon/radeon_dp_mst.c        | 10 +-
 drivers/gpu/drm/shmobile/shmob_drm_drv.c      |  6 +-
 drivers/gpu/drm/tegra/dsi.c                   |  6 +-
 drivers/gpu/drm/tegra/hdmi.c                  |  6 +-
 drivers/gpu/drm/tegra/sor.c                   | 11 ++-
 drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c         | 11 ++-
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c           | 12 ++-
 include/drm/drm_modeset_lock.h                |  2 -
 30 files changed, 265 insertions(+), 292 deletions(-)


base-commit: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f
-- 
2.33.0