[PATCH v11 00/11] drm/i915: Add drm_panic support

[Jocelyn Falempe <jfalempe@redhat.com>]

This adds drm_panic support for i915 and xe driver.

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.
I think it won't work yet on discrete GPU, but that can be added later.

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@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@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.

v9:
 * Fix comment in ttm_bo_kmap_try_from_panic(), this can *only* be called
   from the panic handler (Christian König)
 * Fix missing kfree() for i915_panic_pages in i915_gem_object_panic_finish()
   Also change i915_panic_pages allocation to kmalloc, as kvmalloc is not
   safe to call from the panic handler.
 * Fix dim checkpatch warnings.

v10:
 * Add a private field to struct drm_scanout_buffer
 * Replace static variables with new fields in struct intel_framebuffer
   (Maarten Lankhorst)
 * Add error handling if i915_gem_object_panic_pages() returns NULL
 * Declare struct drm_scanout_buffer instead of including <drm/drm_panic.h>
   in intel_bo.h

v11:
 * Encapsulate the struct intel_framebuffer into a xe_framebuffer or
   i915_framebuffer, to make it easier to add a struct xe_res_cursor
   to support discrete GPU later.


Jocelyn Falempe (11):
  drm/panic: Add a private field to struct drm_scanout_buffer
  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_alloc_framebuffer()
  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     |  26 ++-
 drivers/gpu/drm/i915/display/intel_bo.c       |  17 ++
 drivers/gpu/drm/i915/display/intel_bo.h       |   5 +
 .../drm/i915/display/intel_display_types.h    |   4 +
 drivers/gpu/drm/i915/display/intel_fb.c       |   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_plane.c    | 170 +++++++++++++++++-
 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    |  29 ++-
 drivers/gpu/drm/i915/gem/i915_gem_object.h    |   6 +
 drivers/gpu/drm/i915/gem/i915_gem_pages.c     | 142 +++++++++++++++
 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         |  91 ++++++++++
 drivers/gpu/drm/xe/display/xe_fb_pin.c        |   5 +
 include/drm/drm_panic.h                       |   6 +
 include/drm/ttm/ttm_bo.h                      |   1 +
 21 files changed, 571 insertions(+), 5 deletions(-)


base-commit: 266907bb491f2bdd731139792b5a5056b6d0a482
-- 
2.49.0