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linux/drivers/gpu/drm/sysfb/Makefile

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drm: Move sysfb drivers into separate subdirectory The ofdrm and simpledrm drivers are special as they operate on externally provided framebuffers. Move them into their own sub- directory. Will let them share common code. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250401094056.32904-5-tzimmermann@suse.de
2025-04-01 11:37:07 +02:00
drm/sysfb: Split source file Split drm_sysfb_helper.c into two source files. There's now one source file for the mode-setting pipeline and one source file for module meta data. Prepares for adding additional source code to sysfb helpers. v2: - fix typo in commit message (Javier) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250410083834.10810-2-tzimmermann@suse.de
2025-04-10 10:37:23 +02:00
drm/sysfb: Share helpers for screen_info validation Share efidrm's and vesadrm's validation of struct screen_info in shared helpers. Update the drivers. Most validation helpers test individual values against limits and can be shared as they are. For color formats, a common helper looks up the correct DRM format info from a driver-provided list of color formats. These screen_info helpers are only available if CONFIG_SCREEN_INFO has been selected, as done by efidrm and vesadrm. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250410083834.10810-4-tzimmermann@suse.de
2025-04-10 10:37:25 +02:00
drm/sysfb: Add struct drm_sysfb_device Add struct drm_sysfb_device that stores the system display's hardware settings. Further helpers for the mode-setting pipeline will use these fields. Convert ofdrm and simpledrm by embedding the sysfb device in their device structs. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250401094056.32904-6-tzimmermann@suse.de
2025-04-01 11:37:08 +02:00
drm/sysfb: corebootdrm: Add DRM driver for coreboot framebuffers Add corebootdrm, a DRM driver for coreboot framebuffers. The driver supports a pre-initialized framebuffer with various packed RGB formats. The driver code is fairly small and uses the same logic as the other sysfb drivers. Most of the implementation comes from existing sysfb helpers. Until now, coreboot relied on simpledrm or simplefb for boot-up graphics output. Initialize the platform device for corebootdrm in the same place in framebuffer_probe(). With a later commit, the simple-framebuffer should be removed. v4: - sort include statements (Tzung-Bi) v3: - comment on _HAS_LFB semantics (Tzung-Bi) - fix typo in commit description (Tzung-Bi) - comment on simple-framebuffer being obsolete for coreboot v2: - reimplement as platform driver - limit resources and mappings to known framebuffer memory; no page alignment - create corebootdrm device from coreboot framebuffer code Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Acked-by: Julius Werner <jwerner@chromium.org> Acked-by: Tzung-Bi Shih <tzungbi@kernel.org> # coreboot Link: https://patch.msgid.link/20260217155836.96267-12-tzimmermann@suse.de
2026-02-17 16:56:21 +01:00
drm/sysfb: Add efidrm for EFI displays Add support for screen_info setups with VIDEO_TYPE_EFI. Provide the minimum functionality of reading modes, updating and clearing the display. There is existing support for these displays provided by simpledrm with CONFIG_SYSFB_SIMPLEFB=y. Using efidrm over simpledrm will allows for the mapping of video memory with correct caching. Simpledrm always assumes WC caching, while fully cached memory is possible with efidrm. Efidrm will also allow for the use of additional functionality provided by EFI, such as EDID information. In addition to efidrm, add struct pixel_format plus initializer macros. The type and macros describe pixel formats in a generic way on order to find the DRM format from the screen_info settings. Similar existing code in SIMPLEFB_FORMATS and fbdev is not really what is needed in efidrm, but SIMPLEFB_FORMATS can later be converted to struct pixel_format. v4: - depend on CONFIG_EFI - disallow module for now as efi_mem_desc_lookup() is not exported v3: - depend on !SYSFB_SIMPLEFB (Javier) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250401094056.32904-15-tzimmermann@suse.de
2025-04-01 11:37:17 +02:00
drm: Move sysfb drivers into separate subdirectory The ofdrm and simpledrm drivers are special as they operate on externally provided framebuffers. Move them into their own sub- directory. Will let them share common code. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250401094056.32904-5-tzimmermann@suse.de
2025-04-01 11:37:07 +02:00
drm/sysfb: Add vesadrm for VESA displays Add support for screen_info setups with VIDEO_TYPE_VLFB. Provide the minimum functionality of reading modes, updating and clearing the display. There is existing support for these displays provided by simpledrm with CONFIG_SYSFB_SIMPLEFB=y. Using vesadrm over simpledrm will allow for the use of additional functionality provided by VESA, such as EDID information, gamma correction and palette modes. This enhances the user experience and adds support for more display configuratons. v4: - depend on CONFIG_X86 v3: - depend on !SYSFB_SIMPLEFB (Javier) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250401094056.32904-17-tzimmermann@suse.de
2025-04-01 11:37:19 +02:00