linux-toradex.git/drivers/gpu/drm/tiny/cirrus.c, branch v5.17

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/format-helper: Rework format-helper conversion functions

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

Move destination-buffer clipping from all format-helper conversion
functions into callers. Support destination-buffer pitch. Only
distinguish between system and I/O memory, but use same logic
everywhere.

Simply harmonize the interface and semantics of the existing code.
Not all conversion helpers support all combinations of parameters.
We have to add additional features when we need them.

v2:
	* fix default destination pitch in drm_fb_xrgb8888_to_gray8()
	  (Noralf)

Signed-off-by: Thomas Zimmermann 
Tested-by: Noralf Trønnes 
Reviewed-by: Noralf Trønnes 
Link: https://patchwork.freedesktop.org/patch/msgid/20211110103702.374-5-tzimmermann@suse.de

drm/format-helper: Rework format-helper memcpy functions

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

Move destination-buffer clipping from all format-helper memcpy
function into callers. Support destination-buffer pitch. Only
distinguish between system and I/O memory, but use same logic
everywhere.

Signed-off-by: Thomas Zimmermann 
Tested-by: Noralf Trønnes 
Reviewed-by: Noralf Trønnes 
Link: https://patchwork.freedesktop.org/patch/msgid/20211110103702.374-3-tzimmermann@suse.de

drm/cirrus: Use offset-adjusted shadow-plane mappings

2021-08-08T18:27:34+00:00

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
cirrus.

Signed-off-by: Thomas Zimmermann 
Acked-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-7-tzimmermann@suse.de

drm/aperture: Pass DRM driver structure instead of driver name

2021-07-01T09:11:55+00:00

Print the name of the DRM driver when taking over fbdev devices. Makes
the output to dmesg more consistent. Note that the driver name is only
used for printing a string to the kernel log. No UAPI is affected by this
change.

Signed-off-by: Thomas Zimmermann 
Acked-by: Nirmoy Das 
Acked-by: Chen-Yu Tsai  # sun4i
Acked-by: Neil Armstrong  # meson
Link: https://patchwork.freedesktop.org/patch/msgid/20210629135833.22679-1-tzimmermann@suse.de

drm/format-helper: Pass destination pitch to drm_fb_memcpy_dstclip()

2021-05-01T10:45:03+00:00

The memcpy's destination buffer might have a different pitch than the
source. Support different pitches as function argument.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Daniel Vetter 
Acked-by: Maxime Ripard 
Tested-by: nerdopolis 
Link: https://patchwork.freedesktop.org/patch/msgid/20210430105840.30515-2-tzimmermann@suse.de

drm/aperture: Convert drivers to aperture interfaces

2021-04-14T07:00:04+00:00

Mass-convert all drivers from FB helpers to aperture interfaces. No
functional changes besides checking for returned errno codes.

Signed-off-by: Thomas Zimmermann 
Acked-by: Jani Nikula 
Link: https://patchwork.freedesktop.org/patch/msgid/20210412131043.5787-3-tzimmermann@suse.de

drm/cirrus: Move vmap out of commit tail

2021-02-08T12:00:36+00:00

Vmap operations may acquire the dmabuf reservation lock, which is not
allowed within atomic commit-tail functions. Therefore move vmap and
vunmap from the damage handler into prepare_fb and cleanup_fb callbacks.

The mapping is provided as GEM shadow-buffered plane. The functions in
the commit tail use the pre-established mapping for damage handling.

Signed-off-by: Thomas Zimmermann 
Tested-by: Gerd Hoffmann 
Acked-by: Gerd Hoffmann 
Link: https://patchwork.freedesktop.org/patch/msgid/20210208115538.6430-6-tzimmermann@suse.de

drm/cirrus: Remove references to struct drm_device.pdev

2021-01-06T14:43:10+00:00

Using struct drm_device.pdev is deprecated. Convert cirrus to struct
drm_device.dev. No functional changes.

Signed-off-by: Thomas Zimmermann 
Acked-by: Gerd Hoffmann 
Acked-by: Sam Ravnborg 
Cc: Gerd Hoffmann 
Link: https://patchwork.freedesktop.org/patch/msgid/20201201103542.2182-6-tzimmermann@suse.de

drm/gem: Use struct dma_buf_map in GEM vmap ops and convert GEM backends

2020-11-09T08:19:24+00:00

This patch replaces the vmap/vunmap's use of raw pointers in GEM object
functions with instances of struct dma_buf_map. GEM backends are
converted as well. For most of them, this simply changes the returned type.

TTM-based drivers now return information about the location of the memory,
either system or I/O memory. GEM VRAM helpers and qxl now use ttm_bo_vmap()
et al. Amdgpu, nouveau and radeon use drm_gem_ttm_vmap() et al instead of
implementing their own vmap callbacks.

v7:
	* init QXL cursor to mapped BO buffer (kernel test robot)
v5:
	* update vkms after switch to shmem
v4:
	* use ttm_bo_vmap(), drm_gem_ttm_vmap(), et al. (Daniel, Christian)
	* fix a trailing { in drm_gem_vmap()
	* remove several empty functions instead of converting them (Daniel)
	* comment uses of raw pointers with a TODO (Daniel)
	* TODO list: convert more helpers to use struct dma_buf_map

Signed-off-by: Thomas Zimmermann 
Acked-by: Christian König 
Tested-by: Sam Ravnborg 
Link: https://patchwork.freedesktop.org/patch/msgid/20201103093015.1063-7-tzimmermann@suse.de