[PATCH v8 0/9] drm/i915: Add drm_panic support

[Jocelyn Falempe]

This is a draft of drm_panic support for i915.

I've tested it on the 4 intel laptops I have at my disposal.
 * Haswell with 128MB of eDRAM.
 * Comet Lake  i7-10850H
 * Raptor Lake i7-1370P (with DPT, and Y-tiling).
 * Lunar Lake Ultra 5 228V (with DPT, and 4-tiling, and using the Xe driver.

I tested panic in both fbdev console and gnome desktop.

Best regards,

v2:
 * Add the proper abstractions to build also for Xe.
 * Fix dim checkpatch issues.

v3:
 * Add support for Y-tiled framebuffer when DPT is enabled.

v4:
 * Add support for Xe driver, which shares most of the code.
 * Add support for 4-tiled framebuffer found in newest GPU.

v5:
 * Rebase on top of git at gitlab.freedesktop.org:drm/i915/kernel.git drm-intel-next
 * Use struct intel_display instead of drm_i915_private.
 * Use iosys_map for intel_bo_panic_map().

v6:
 * Rebase on top of git at gitlab.freedesktop.org:drm/i915/kernel.git drm-intel-next
 * Use struct intel_display instead of drm_i915_private for intel_atomic_plane.c

v7:
 * Fix mismatch {} in intel_panic_flush() (Jani Nikula)
 * Return int for i915_gem_object_panic_map() (Ville Syrjälä)
 * Reword commit message about alignment/size when disabling tiling (Ville Syrjälä)*

v8:
 * Use kmap_try_from_panic() instead of vmap, to access the framebuffer.
 * Add ttm_bo_kmap_try_from_panic() for the xe driver, that uses ttm.
 * Replace intel_bo_panic_map() with a setup() and finish() function,
   to allow mapping only one page of teh framebuffer at a time.
 * Configure psr to send the full framebuffer update.

Jocelyn Falempe (9):
  drm/i915/fbdev: Add intel_fbdev_get_map()
  drm/i915/display/i9xx: Add a disable_tiling() for i9xx planes
  drm/i915/display: Add a disable_tiling() for skl planes
  drm/ttm: Add ttm_bo_kmap_try_from_panic()
  drm/i915: Add intel_bo_panic_setup and intel_bo_panic_finish
  drm/i915/display: Add drm_panic support
  drm/i915/display: Add drm_panic support for Y-tiling with DPT
  drm/i915/display: Add drm_panic support for 4-tiling with DPT
  drm/i915/psr: Add intel_psr2_panic_force_full_update

 drivers/gpu/drm/i915/display/i9xx_plane.c     |  23 +++
 .../gpu/drm/i915/display/intel_atomic_plane.c | 169 +++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_bo.c       |  12 ++
 drivers/gpu/drm/i915/display/intel_bo.h       |   4 +
 .../drm/i915/display/intel_display_types.h    |   2 +
 drivers/gpu/drm/i915/display/intel_fb_pin.c   |   5 +
 drivers/gpu/drm/i915/display/intel_fb_pin.h   |   2 +
 drivers/gpu/drm/i915/display/intel_fbdev.c    |   5 +
 drivers/gpu/drm/i915/display/intel_fbdev.h    |   6 +-
 drivers/gpu/drm/i915/display/intel_psr.c      |  20 +++
 drivers/gpu/drm/i915/display/intel_psr.h      |   2 +
 .../drm/i915/display/skl_universal_plane.c    |  27 +++
 drivers/gpu/drm/i915/gem/i915_gem_object.h    |   5 +
 drivers/gpu/drm/i915/gem/i915_gem_pages.c     | 109 +++++++++++
 drivers/gpu/drm/i915/i915_vma.h               |   5 +
 drivers/gpu/drm/ttm/ttm_bo_util.c             |  27 +++
 drivers/gpu/drm/xe/display/intel_bo.c         |  61 +++++++
 drivers/gpu/drm/xe/display/xe_fb_pin.c        |   5 +
 include/drm/ttm/ttm_bo.h                      |   1 +
 19 files changed, 488 insertions(+), 2 deletions(-)


base-commit: 7247efca0dcbc8ac6147db9200ed1549c0662465
-- 
2.49.0