kernel.git/drivers/gpu/drm/ast/ast_mm.c, branch linux-rolling-stable

drm/ast: Remove vram_fb_available from struct ast_device

2025-03-12T07:38:12Z

Helpers compute the offset and size of the available framebuffer memory. Remove the obsolete field vram_fb_available from struct ast_device. Also define the cursor-signature size next to its only user. v2: - initialize plane size Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20250305163207.267650-7-tzimmermann@suse.de

drm/ast: Add VGACR99 register constants

2025-03-12T07:38:10Z

Add register constants for VGACR99 and use them when detecting the size of the VGA memory. Aligns the code with the programming manual. Also replace literal size values with Linux' SZ_ size constants. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20250305163207.267650-4-tzimmermann@suse.de

drm/ast: Add VGACRAA register constants

2025-03-12T07:38:10Z

Add register constants for VGACRAA and use them when detecting the size of the VGA memory. Aligns the code with the programming manual. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20250305163207.267650-3-tzimmermann@suse.de

drm/ast: Replace AST_VIDMEM_SIZE_ with Linux SZ_ constants

2025-03-12T07:38:09Z

Ast's AST_VIDMEM_SIZE_ constants enumerate supported video-memory sizes from 8 MiB to 128 MiB. Replace them with Linux' SZ_ constants of the same value. When expanded, the literal values remain the same. The size constant for 128 MiB is unused and the default size is not necessary. Remove both of them. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20250305163207.267650-2-tzimmermann@suse.de

drm/ast: Rename AST_IO_CRTC_PORT to AST_IO_VGACRI

2023-10-19T11:55:33Z

Rename AST_IO_CRTC_PORT to AST_IO_VGACRI to align naming in the driver with documentation. No functional changes. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20231017083653.10063-10-tzimmermann@suse.de

drm/ast: Enable and unlock device access early during init

2023-06-27T12:26:32Z

POST and memory management contains code to enable access to the device's memory spaces. This is too late. Consolidate this code at the beginning of the device initialization. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Tested-by: Jocelyn Falempe # AST2600 Link: https://patchwork.freedesktop.org/patch/msgid/20230621130032.3568-8-tzimmermann@suse.de

drm/ast: Rename struct ast_private to struct ast_device

2023-03-01T09:28:42Z

The data structure struct ast_private represents an AST device. Its name comes from the time when it was allocated and stored separately in struct drm_device.dev_private. The DRM device is now embedded, so rename struct ast_private to struct ast_device. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20230221155745.27484-4-tzimmermann@suse.de

drm/ast: Convert ast to SHMEM

2022-10-16T09:16:50Z

Replace GEM VRAM helpers with GEM SHMEM helpers in ast. Avoids OOM errors when allocating video memory. Also adds support for dma-buf functionality. Aspeed display hardware supports display resolutions of FullHD and higher at 32-bit pixel depth. But the amount of video memory is in the range of 8 MiB to 32 MiB, which adds constraints to the actually available resolutions. As atomic modesetting with VRAM helpers requires double buffering in video memory, ast fails to pageflip in some configurations. For example, FullHD with an active cursor plane does not work on devices with 16 MiB of video memory. Resolve this problem by converting the ast driver to GEM SHMEM helpers. Keep the buffer objects in system memory and copy to video memory on pageflips via shadow-plane helpers. Userspace used to require shadow planes for decent performance, but that's now provided by the driver. To replace the memory management, the patch also implements damage handling for the primary plane. With GEM SHMEM helpers, dma-buf import and export is now supported by ast. This allows easier screen mirroring across devices or with an Aspeed-based BMC. A corresponding feature request is available at [1]. v2: * fix typos in commit message (Jocelyn) Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Tested-by: Jocelyn Falempe Link: https://lore.kernel.org/dri-devel/20220901124451.2523077-1-oushixiong@kylinos.cn/ # [1] Link: https://patchwork.freedesktop.org/patch/msgid/20221013112923.769-8-tzimmermann@suse.de

drm/ast: Use managed interfaces for framebuffer write combining

2021-09-23T07:26:09Z

Replace arch_phys_wc_add() and arch_io_reserve_memtype_wc() with the rsp managed functions. Allows for removing the cleanup code for memory management Signed-off-by: Thomas Zimmermann Reviewed-by: Hans de Goede Link: https://patchwork.freedesktop.org/patch/msgid/20210916181601.9146-4-tzimmermann@suse.de

drm/ast: Remove references to struct drm_device.pdev

2021-01-06T14:38:30Z

Using struct drm_device.pdev is deprecated. Convert ast to struct drm_device.dev. No functional changes. Signed-off-by: Thomas Zimmermann Acked-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20201201103542.2182-4-tzimmermann@suse.de