| 34,6 → 34,11 |
|---|
| |
| #include <linux/kgdb.h> |
| |
| enum mode_set_atomic { |
| LEAVE_ATOMIC_MODE_SET, |
| ENTER_ATOMIC_MODE_SET, |
| }; |
| |
| struct drm_fb_offset { |
| int x, y; |
| }; |
| 74,25 → 79,76 |
|---|
| |
| /** |
| * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library |
| * @gamma_set: Set the given gamma lut register on the given crtc. |
| * @gamma_get: Read the given gamma lut register on the given crtc, used to |
| * save the current lut when force-restoring the fbdev for e.g. |
| * kdbg. |
| * @fb_probe: Driver callback to allocate and initialize the fbdev info |
| * structure. Furthermore it also needs to allocate the drm |
| * framebuffer used to back the fbdev. |
| * @initial_config: Setup an initial fbdev display configuration |
| * |
| * Driver callbacks used by the fbdev emulation helper library. |
| */ |
| struct drm_fb_helper_funcs { |
| /** |
| * @gamma_set: |
| * |
| * Set the given gamma LUT register on the given CRTC. |
| * |
| * This callback is optional. |
| * |
| * FIXME: |
| * |
| * This callback is functionally redundant with the core gamma table |
| * support and simply exists because the fbdev hasn't yet been |
| * refactored to use the core gamma table interfaces. |
| */ |
| void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green, |
| u16 blue, int regno); |
| /** |
| * @gamma_get: |
| * |
| * Read the given gamma LUT register on the given CRTC, used to save the |
| * current LUT when force-restoring the fbdev for e.g. kdbg. |
| * |
| * This callback is optional. |
| * |
| * FIXME: |
| * |
| * This callback is functionally redundant with the core gamma table |
| * support and simply exists because the fbdev hasn't yet been |
| * refactored to use the core gamma table interfaces. |
| */ |
| void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green, |
| u16 *blue, int regno); |
| |
| /** |
| * @fb_probe: |
| * |
| * Driver callback to allocate and initialize the fbdev info structure. |
| * Furthermore it also needs to allocate the DRM framebuffer used to |
| * back the fbdev. |
| * |
| * This callback is mandatory. |
| * |
| * RETURNS: |
| * |
| * The driver should return 0 on success and a negative error code on |
| * failure. |
| */ |
| int (*fb_probe)(struct drm_fb_helper *helper, |
| struct drm_fb_helper_surface_size *sizes); |
| |
| /** |
| * @initial_config: |
| * |
| * Driver callback to setup an initial fbdev display configuration. |
| * Drivers can use this callback to tell the fbdev emulation what the |
| * preferred initial configuration is. This is useful to implement |
| * smooth booting where the fbdev (and subsequently all userspace) never |
| * changes the mode, but always inherits the existing configuration. |
| * |
| * This callback is optional. |
| * |
| * RETURNS: |
| * |
| * The driver should return true if a suitable initial configuration has |
| * been filled out and false when the fbdev helper should fall back to |
| * the default probing logic. |
| */ |
| bool (*initial_config)(struct drm_fb_helper *fb_helper, |
| struct drm_fb_helper_crtc **crtcs, |
| struct drm_display_mode **modes, |
| 105,7 → 161,7 |
|---|
| }; |
| |
| /** |
| * struct drm_fb_helper - helper to emulate fbdev on top of kms |
| * struct drm_fb_helper - main structure to emulate fbdev on top of KMS |
| * @fb: Scanout framebuffer object |
| * @dev: DRM device |
| * @crtc_count: number of possible CRTCs |
| 112,11 → 168,15 |
|---|
| * @crtc_info: per-CRTC helper state (mode, x/y offset, etc) |
| * @connector_count: number of connected connectors |
| * @connector_info_alloc_count: size of connector_info |
| * @connector_info: array of per-connector information |
| * @funcs: driver callbacks for fb helper |
| * @fbdev: emulated fbdev device info struct |
| * @pseudo_palette: fake palette of 16 colors |
| * @kernel_fb_list: list_head in kernel_fb_helper_list |
| * @delayed_hotplug: was there a hotplug while kms master active? |
| * |
| * This is the main structure used by the fbdev helpers. Drivers supporting |
| * fbdev emulation should embedded this into their overall driver structure. |
| * Drivers must also fill out a struct &drm_fb_helper_funcs with a few |
| * operations. |
| */ |
| struct drm_fb_helper { |
| struct drm_framebuffer *fb; |
| 129,10 → 189,21 |
|---|
| const struct drm_fb_helper_funcs *funcs; |
| struct fb_info *fbdev; |
| u32 pseudo_palette[17]; |
| |
| /** |
| * @kernel_fb_list: |
| * |
| * Entry on the global kernel_fb_helper_list, used for kgdb entry/exit. |
| */ |
| struct list_head kernel_fb_list; |
| |
| /* we got a hotplug but fbdev wasn't running the console |
| delay until next set_par */ |
| /** |
| * @delayed_hotplug: |
| * |
| * A hotplug was received while fbdev wasn't in control of the DRM |
| * device, i.e. another KMS master was active. The output configuration |
| * needs to be reprobe when fbdev is in control again. |
| */ |
| bool delayed_hotplug; |
| |
| /** |