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e8c086880b
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
185 lines
5.3 KiB
C
185 lines
5.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef DRM_SYSFB_HELPER_H
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#define DRM_SYSFB_HELPER_H
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#include <linux/container_of.h>
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#include <linux/iosys-map.h>
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#include <video/pixel_format.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_device.h>
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#include <drm/drm_modes.h>
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struct drm_format_info;
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struct drm_scanout_buffer;
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struct screen_info;
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/*
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* Input parsing
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*/
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struct drm_sysfb_format {
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struct pixel_format pixel;
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u32 fourcc;
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};
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int drm_sysfb_get_validated_int(struct drm_device *dev, const char *name,
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u64 value, u32 max);
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int drm_sysfb_get_validated_int0(struct drm_device *dev, const char *name,
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u64 value, u32 max);
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#if defined(CONFIG_SCREEN_INFO)
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int drm_sysfb_get_width_si(struct drm_device *dev, const struct screen_info *si);
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int drm_sysfb_get_height_si(struct drm_device *dev, const struct screen_info *si);
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struct resource *drm_sysfb_get_memory_si(struct drm_device *dev,
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const struct screen_info *si,
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struct resource *res);
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int drm_sysfb_get_stride_si(struct drm_device *dev, const struct screen_info *si,
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const struct drm_format_info *format,
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unsigned int width, unsigned int height, u64 size);
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u64 drm_sysfb_get_visible_size_si(struct drm_device *dev, const struct screen_info *si,
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unsigned int height, unsigned int stride, u64 size);
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const struct drm_format_info *drm_sysfb_get_format_si(struct drm_device *dev,
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const struct drm_sysfb_format *formats,
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size_t nformats,
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const struct screen_info *si);
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#endif
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/*
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* Input parsing
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*/
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int drm_sysfb_get_validated_int(struct drm_device *dev, const char *name,
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u64 value, u32 max);
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int drm_sysfb_get_validated_int0(struct drm_device *dev, const char *name,
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u64 value, u32 max);
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/*
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* Display modes
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*/
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struct drm_display_mode drm_sysfb_mode(unsigned int width,
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unsigned int height,
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unsigned int width_mm,
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unsigned int height_mm);
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/*
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* Device
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*/
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struct drm_sysfb_device {
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struct drm_device dev;
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const u8 *edid; /* can be NULL */
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/* hardware settings */
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struct drm_display_mode fb_mode;
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const struct drm_format_info *fb_format;
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unsigned int fb_pitch;
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unsigned int fb_gamma_lut_size;
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/* hardware-framebuffer kernel address */
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struct iosys_map fb_addr;
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};
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static inline struct drm_sysfb_device *to_drm_sysfb_device(struct drm_device *dev)
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{
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return container_of(dev, struct drm_sysfb_device, dev);
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}
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/*
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* Plane
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*/
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int drm_sysfb_plane_helper_atomic_check(struct drm_plane *plane,
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struct drm_atomic_state *new_state);
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void drm_sysfb_plane_helper_atomic_update(struct drm_plane *plane,
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struct drm_atomic_state *state);
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void drm_sysfb_plane_helper_atomic_disable(struct drm_plane *plane,
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struct drm_atomic_state *state);
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int drm_sysfb_plane_helper_get_scanout_buffer(struct drm_plane *plane,
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struct drm_scanout_buffer *sb);
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#define DRM_SYSFB_PLANE_NFORMATS(_num_native) \
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((_num_native) + 1)
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#define DRM_SYSFB_PLANE_FORMAT_MODIFIERS \
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DRM_FORMAT_MOD_LINEAR, \
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DRM_FORMAT_MOD_INVALID
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#define DRM_SYSFB_PLANE_HELPER_FUNCS \
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DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, \
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.atomic_check = drm_sysfb_plane_helper_atomic_check, \
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.atomic_update = drm_sysfb_plane_helper_atomic_update, \
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.atomic_disable = drm_sysfb_plane_helper_atomic_disable, \
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.get_scanout_buffer = drm_sysfb_plane_helper_get_scanout_buffer
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#define DRM_SYSFB_PLANE_FUNCS \
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.update_plane = drm_atomic_helper_update_plane, \
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.disable_plane = drm_atomic_helper_disable_plane, \
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DRM_GEM_SHADOW_PLANE_FUNCS
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/*
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* CRTC
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*/
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struct drm_sysfb_crtc_state {
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struct drm_crtc_state base;
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/* Primary-plane format; required for color mgmt. */
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const struct drm_format_info *format;
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};
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static inline struct drm_sysfb_crtc_state *
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to_drm_sysfb_crtc_state(struct drm_crtc_state *base)
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{
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return container_of(base, struct drm_sysfb_crtc_state, base);
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}
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enum drm_mode_status drm_sysfb_crtc_helper_mode_valid(struct drm_crtc *crtc,
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const struct drm_display_mode *mode);
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int drm_sysfb_crtc_helper_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *new_state);
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#define DRM_SYSFB_CRTC_HELPER_FUNCS \
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.mode_valid = drm_sysfb_crtc_helper_mode_valid, \
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.atomic_check = drm_sysfb_crtc_helper_atomic_check
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void drm_sysfb_crtc_reset(struct drm_crtc *crtc);
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struct drm_crtc_state *drm_sysfb_crtc_atomic_duplicate_state(struct drm_crtc *crtc);
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void drm_sysfb_crtc_atomic_destroy_state(struct drm_crtc *crtc, struct drm_crtc_state *crtc_state);
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#define DRM_SYSFB_CRTC_FUNCS \
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.reset = drm_sysfb_crtc_reset, \
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.set_config = drm_atomic_helper_set_config, \
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.page_flip = drm_atomic_helper_page_flip, \
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.atomic_duplicate_state = drm_sysfb_crtc_atomic_duplicate_state, \
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.atomic_destroy_state = drm_sysfb_crtc_atomic_destroy_state
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/*
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* Connector
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*/
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int drm_sysfb_connector_helper_get_modes(struct drm_connector *connector);
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#define DRM_SYSFB_CONNECTOR_HELPER_FUNCS \
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.get_modes = drm_sysfb_connector_helper_get_modes
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#define DRM_SYSFB_CONNECTOR_FUNCS \
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.reset = drm_atomic_helper_connector_reset, \
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.fill_modes = drm_helper_probe_single_connector_modes, \
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, \
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state
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/*
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* Mode config
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*/
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#define DRM_SYSFB_MODE_CONFIG_FUNCS \
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.fb_create = drm_gem_fb_create_with_dirty, \
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.atomic_check = drm_atomic_helper_check, \
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.atomic_commit = drm_atomic_helper_commit
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#endif
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