kernel/linux.git/include/drm/drm_drv.h, branch v6.1.174

drm: Return error codes from struct drm_driver.gem_create_object

2021-12-02T10:12:39+00:00

GEM helper libraries use struct drm_driver.gem_create_object to let drivers override GEM object allocation. On failure, the call returns NULL. Change the semantics to make the calls return a pointer-encoded error. This aligns the callback with its callers. Fixes the ingenic driver, which already returns an error pointer. Also update the callers to handle the involved types more strictly. Signed-off-by: Thomas Zimmermann Reviewed-by: Steven Price Acked-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20211130095255.26710-1-tzimmermann@suse.de

drm: Decouple nomodeset from CONFIG_VGA_CONSOLE

2021-11-27T12:52:28+00:00

This relationship was only for historical reasons and the nomodeset option should be available even on platforms that don't enable CONFIG_VGA_CONSOLE. Suggested-by: Thomas Zimmermann Signed-off-by: Javier Martinez Canillas Acked-by: Thomas Zimmermann Acked-by: Jani Nikula Acked-by: Pekka Paalanen Link: https://patchwork.freedesktop.org/patch/msgid/20211112133230.1595307-5-javierm@redhat.com

drm: Move nomodeset kernel parameter to the DRM subsystem

2021-11-27T12:52:22+00:00

The "nomodeset" kernel cmdline parameter is handled by the vgacon driver but the exported vgacon_text_force() symbol is only used by DRM drivers. It makes much more sense for the parameter logic to be in the subsystem of the drivers that are making use of it. Let's move the vgacon_text_force() function and related logic to the DRM subsystem. While doing that, rename it to drm_firmware_drivers_only() and make it return true if "nomodeset" was used and false otherwise. This is a better description of the condition that the drivers are testing for. Suggested-by: Daniel Vetter Signed-off-by: Javier Martinez Canillas Acked-by: Thomas Zimmermann Acked-by: Jani Nikula Acked-by: Pekka Paalanen Acked-by: Greg Kroah-Hartman Link: https://patchwork.freedesktop.org/patch/msgid/20211112133230.1595307-4-javierm@redhat.com

drm: Update documentation and TODO of gem_prime_mmap hook

2021-11-11T11:06:57+00:00

The hook gem_prime_mmap in struct drm_driver is deprecated. Document the new requirements. Signed-off-by: Thomas Zimmermann Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20211108102846.309-4-tzimmermann@suse.de

drm: IRQ midlayer is now legacy

2021-08-10T18:14:01+00:00

Hide the DRM midlayer behind CONFIG_DRM_LEGACY, make functions use the prefix drm_legacy_, and move declarations to drm_legacy.h. In struct drm_device, move the fields irq and irq_enabled behind CONFIG_DRM_LEGACY. All callers have been updated. Signed-off-by: Thomas Zimmermann Acked-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-15-tzimmermann@suse.de

drm: Fix 3 typos in the inline doc

2021-03-26T10:46:33+00:00

Fix the following typos: 1. When mentioning a list of functions, the function drm_atomic_helper_disable_plane is mentioned twice. 2. drop the word 'afterwards': s/afterwards after that/after that/' 3. drop extra 'the': s/but do not the support the full/but do not support the full/ Signed-off-by: Dafna Hirschfeld Reviewed-by: Simon Ser Signed-off-by: Simon Ser Link: https://patchwork.freedesktop.org/patch/msgid/20210326103216.7918-1-dafna.hirschfeld@collabora.com

drm: Move legacy device list out of drm_driver

2021-01-05T05:20:29+00:00

The drm_driver structure contains a single field (legacy_dev_list) that is modified by the DRM core, used to store a linked list of legacy DRM devices associated with the driver. In order to make the structure const, move the field out to a global variable. This requires locking access to the global where the local field didn't require serialization, but this only affects legacy drivers, and isn't in any hot path. While at it, compile-out the legacy_dev_list field when DRM_LEGACY isn't defined. Signed-off-by: Laurent Pinchart Reviewed-by: Daniel Vetter Reviewed-by: Emil Velikov

drm: Allow const struct drm_driver

2020-11-06T09:31:26+00:00

It's nice if a big function/ioctl table like this is const. Only downside here is that we need a few more #ifdef to paper over the differences when CONFIG_DRM_LEGACY is enabled. Maybe provides more motivation to sunset that horror show :-) v2: - Fix super important checkpatch warning (Sam) - Update the kerneldoc example too (Sam) Acked-by: Maxime Ripard Reviewed-by: Sam Ravnborg Acked-by: Thomas Zimmermann Reviewed-by: Alex Deucher Signed-off-by: Daniel Vetter Cc: Sam Ravnborg Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20201104100425.1922351-4-daniel.vetter@ffwll.ch

drm: Compile out legacy chunks from struct drm_device

2020-11-06T09:31:26+00:00

This means some very few #ifdef in code, but it allows us to enlist the compiler to make sure this stuff isn't used anymore. More important, only legacy drivers change drm_device (for the legacy_dev_list shadow attach management), therefore this is prep to allow modern drivers to have a const driver struct. Which is nice, because there's a ton of function pointers in there. Acked-by: Maxime Ripard Reviewed-by: Sam Ravnborg Review-by: Thomas Zimmermann Reviewed-by: Alex Deucher Signed-off-by: Daniel Vetter Cc: Sam Ravnborg Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20201104100425.1922351-2-daniel.vetter@ffwll.ch

drm: Remove obsolete GEM and PRIME callbacks from struct drm_driver

2020-09-25T07:21:48+00:00

Several GEM and PRIME callbacks have been deprecated in favor of per-instance GEM object functions. Remove the callbacks as they are now unused. The only exception is .gem_prime_mmap, which is still in use by several drivers. What is also gone is gem_vm_ops in struct drm_driver. All drivers now use struct drm_gem_object_funcs.vm_ops instead. While at it, the patch also improves error handling around calls to .free and .get_sg_table callbacks. v3: * restore default call to drm_gem_prime_export() in drm_gem_prime_handle_to_fd() * return -ENOSYS if get_sg_table is not set * drop all checks for obj->funcs * clean up TODO list and documentation v2: * update related TODO item (Sam) Signed-off-by: Thomas Zimmermann Acked-by: Daniel Vetter Acked-by: Christian König Link: https://patchwork.freedesktop.org/patch/msgid/20200923102159.24084-23-tzimmermann@suse.de