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/* SPDX-License-Identifier: GPL-2.0+ */
#ifndef _VKMS_DRV_H_
#define _VKMS_DRV_H_
#include <linux/hrtimer.h>
#include <drm/drm.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_encoder.h>
#include <drm/drm_writeback.h>
#define XRES_MIN 10
#define YRES_MIN 10
#define XRES_DEF 1024
#define YRES_DEF 768
#define XRES_MAX 8192
#define YRES_MAX 8192
#define NUM_OVERLAY_PLANES 8
#define VKMS_LUT_SIZE 256
struct vkms_frame_info {
struct drm_framebuffer *fb;
struct drm_rect src, dst;
struct drm_rect rotated;
struct iosys_map map[DRM_FORMAT_MAX_PLANES];
unsigned int rotation;
unsigned int offset;
unsigned int pitch;
unsigned int cpp;
};
struct pixel_argb_u16 {
u16 a, r, g, b;
};
struct line_buffer {
size_t n_pixels;
struct pixel_argb_u16 *pixels;
};
struct vkms_writeback_job {
struct iosys_map data[DRM_FORMAT_MAX_PLANES];
struct vkms_frame_info wb_frame_info;
void (*pixel_write)(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel);
};
/**
* vkms_plane_state - Driver specific plane state
* @base: base plane state
* @frame_info: data required for composing computation
*/
struct vkms_plane_state {
struct drm_shadow_plane_state base;
struct vkms_frame_info *frame_info;
void (*pixel_read)(u8 *src_buffer, struct pixel_argb_u16 *out_pixel);
};
struct vkms_plane {
struct drm_plane base;
};
struct vkms_color_lut {
struct drm_color_lut *base;
size_t lut_length;
s64 channel_value2index_ratio;
};
/**
* vkms_crtc_state - Driver specific CRTC state
* @base: base CRTC state
* @composer_work: work struct to compose and add CRC entries
* @n_frame_start: start frame number for computed CRC
* @n_frame_end: end frame number for computed CRC
*/
struct vkms_crtc_state {
struct drm_crtc_state base;
struct work_struct composer_work;
int num_active_planes;
/* stack of active planes for crc computation, should be in z order */
struct vkms_plane_state **active_planes;
struct vkms_writeback_job *active_writeback;
struct vkms_color_lut gamma_lut;
/* below four are protected by vkms_output.composer_lock */
bool crc_pending;
bool wb_pending;
u64 frame_start;
u64 frame_end;
};
struct vkms_output {
struct drm_crtc crtc;
struct drm_encoder encoder;
struct drm_connector connector;
struct drm_writeback_connector wb_connector;
struct hrtimer vblank_hrtimer;
ktime_t period_ns;
struct drm_pending_vblank_event *event;
/* ordered wq for composer_work */
struct workqueue_struct *composer_workq;
/* protects concurrent access to composer */
spinlock_t lock;
/* guarantees that if the composer is enabled, a job will be queued */
struct mutex enabled_lock;
/* protected by @enabled_lock */
bool composer_enabled;
struct vkms_crtc_state *composer_state;
spinlock_t composer_lock;
};
struct vkms_device;
struct vkms_config {
bool writeback;
bool cursor;
bool overlay;
/* only set when instantiated */
struct vkms_device *dev;
};
struct vkms_device {
struct drm_device drm;
struct platform_device *platform;
struct vkms_output output;
const struct vkms_config *config;
};
#define drm_crtc_to_vkms_output(target) \
container_of(target, struct vkms_output, crtc)
#define drm_device_to_vkms_device(target) \
container_of(target, struct vkms_device, drm)
#define to_vkms_crtc_state(target)\
container_of(target, struct vkms_crtc_state, base)
#define to_vkms_plane_state(target)\
container_of(target, struct vkms_plane_state, base.base)
/* CRTC */
int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
struct drm_plane *primary, struct drm_plane *cursor);
int vkms_output_init(struct vkms_device *vkmsdev, int index);
struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
enum drm_plane_type type, int index);
/* CRC Support */
const char *const *vkms_get_crc_sources(struct drm_crtc *crtc,
size_t *count);
int vkms_set_crc_source(struct drm_crtc *crtc, const char *src_name);
int vkms_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
size_t *values_cnt);
/* Composer Support */
void vkms_composer_worker(struct work_struct *work);
void vkms_set_composer(struct vkms_output *out, bool enabled);
void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state *plane, int y);
void vkms_writeback_row(struct vkms_writeback_job *wb, const struct line_buffer *src_buffer, int y);
/* Writeback */
int vkms_enable_writeback_connector(struct vkms_device *vkmsdev);
#endif /* _VKMS_DRV_H_ */
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