[RFC PATCH v4 0/8] 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.
 * Alder Lake (with DPT, and Y-tiling).
 * Lunar Lake (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.

Jocelyn Falempe (8):
  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/i915/gem: Add i915_gem_object_panic_map()
  drm/i915/display: Add drm_panic support
  drm/i915/display: Flush the front buffer in panic handler
  drm/i915/display: Add drm_panic support for Y-tiling with DPT
  drm/i915: Add drm_panic support for 4-tiling with DPT

 drivers/gpu/drm/i915/display/i9xx_plane.c     |  23 +++
 .../gpu/drm/i915/display/intel_atomic_plane.c | 177 +++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_bo.c       |  10 +
 drivers/gpu/drm/i915/display/intel_bo.h       |   2 +
 .../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 +
 .../drm/i915/display/skl_universal_plane.c    |  27 +++
 drivers/gpu/drm/i915/gem/i915_gem_object.h    |   2 +
 drivers/gpu/drm/i915/gem/i915_gem_pages.c     |  25 +++
 drivers/gpu/drm/i915/i915_vma.h               |   5 +
 drivers/gpu/drm/xe/display/intel_bo.c         |  17 ++
 drivers/gpu/drm/xe/display/xe_fb_pin.c        |   5 +
 15 files changed, 312 insertions(+), 1 deletion(-)


base-commit: ff3881cc6a588f8cd714c9ffbbcc9ef6b02c8d0f
-- 
2.47.1