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Add EDID support to sysfb connector helpers. Read the EDID property from the OF node in ofdrm. Without EDID, this does nothing. Some systems with OF display, such as 32-bit PPC Macintoshs, provide the system display's EDID data as node property in their DT. Exporting this information allows compositors to implement correct DPI and meaningful color management. v3: - avoid parser error by clearing EDID extension field v2: - return errno codes on errors (Jani) - simplify EDID read logic (Jani) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://lore.kernel.org/r/20250401094056.32904-13-tzimmermann@suse.de
137 lines
3.8 KiB
C
137 lines
3.8 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 <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_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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