[PATCH v10 00/10] drm/i915: Add drm_panic support

[Maarten Lankhorst]

Hey,

Thanks for the series. I didn't see you on irc so I wanted to ask if you are planning to send a v11 with
the changes from void * to struct intel_panic_data and adding the VRAM support?


Other than that, I think the series looks good and I'll be able to test it on my battlemage.

Best regards,
~Maarten

On 2025-06-18 11:31, Jocelyn Falempe wrote:
> 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 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.
> 
> 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
> 
> Jocelyn Falempe (10):
>   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_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 | 170 +++++++++++++++++-
>  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    |  11 ++
>  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     | 112 ++++++++++++
>  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/drm_panic.h                       |   6 +
>  include/drm/ttm/ttm_bo.h                      |   1 +
>  20 files changed, 507 insertions(+), 2 deletions(-)
> 
> 
> base-commit: b2f7e30d2e4a34fcee8111d713bef4f29dc23c77