1/* SPDX-License-Identifier: MIT */
  2
  3#ifndef __LINUX_GUD_INTERNAL_H
  4#define __LINUX_GUD_INTERNAL_H
  5
  6#include <linux/list.h>
  7#include <linux/mutex.h>
  8#include <linux/usb.h>
  9#include <linux/workqueue.h>
 10#include <uapi/drm/drm_fourcc.h>
 11
 12#include <drm/drm_modes.h>
 13#include <drm/drm_simple_kms_helper.h>
 14
 15struct gud_device {
 16	struct drm_device drm;
 17	struct drm_simple_display_pipe pipe;
 18	struct device *dmadev;
 19	struct work_struct work;
 20	u32 flags;
 21	const struct drm_format_info *xrgb8888_emulation_format;
 22
 23	u16 *properties;
 24	unsigned int num_properties;
 25
 26	unsigned int bulk_pipe;
 27	void *bulk_buf;
 28	size_t bulk_len;
 29
 30	u8 compression;
 31	void *lz4_comp_mem;
 32	void *compress_buf;
 33
 34	u64 stats_length;
 35	u64 stats_actual_length;
 36	unsigned int stats_num_errors;
 37
 38	struct mutex ctrl_lock; /* Serialize get/set and status transfers */
 39
 40	struct mutex damage_lock; /* Protects the following members: */
 41	struct drm_framebuffer *fb;
 42	struct drm_rect damage;
 43	bool prev_flush_failed;
 44};
 45
 46static inline struct gud_device *to_gud_device(struct drm_device *drm)
 47{
 48	return container_of(drm, struct gud_device, drm);
 49}
 50
 51static inline struct usb_device *gud_to_usb_device(struct gud_device *gdrm)
 52{
 53	return interface_to_usbdev(to_usb_interface(gdrm->drm.dev));
 54}
 55
 56int gud_usb_get(struct gud_device *gdrm, u8 request, u16 index, void *buf, size_t len);
 57int gud_usb_set(struct gud_device *gdrm, u8 request, u16 index, void *buf, size_t len);
 58int gud_usb_get_u8(struct gud_device *gdrm, u8 request, u16 index, u8 *val);
 59int gud_usb_set_u8(struct gud_device *gdrm, u8 request, u8 val);
 60
 61void gud_clear_damage(struct gud_device *gdrm);
 62void gud_flush_work(struct work_struct *work);
 63int gud_pipe_check(struct drm_simple_display_pipe *pipe,
 64		   struct drm_plane_state *new_plane_state,
 65		   struct drm_crtc_state *new_crtc_state);
 66void gud_pipe_update(struct drm_simple_display_pipe *pipe,
 67		     struct drm_plane_state *old_state);
 68int gud_connector_fill_properties(struct drm_connector_state *connector_state,
 69				  struct gud_property_req *properties);
 70int gud_get_connectors(struct gud_device *gdrm);
 71
 72/* Driver internal fourcc transfer formats */
 73#define GUD_DRM_FORMAT_R1		0x00000122
 74#define GUD_DRM_FORMAT_XRGB1111		0x03121722
 75
 76static inline u8 gud_from_fourcc(u32 fourcc)
 77{
 78	switch (fourcc) {
 79	case GUD_DRM_FORMAT_R1:
 80		return GUD_PIXEL_FORMAT_R1;
 81	case GUD_DRM_FORMAT_XRGB1111:
 82		return GUD_PIXEL_FORMAT_XRGB1111;
 83	case DRM_FORMAT_RGB565:
 84		return GUD_PIXEL_FORMAT_RGB565;
 85	case DRM_FORMAT_XRGB8888:
 86		return GUD_PIXEL_FORMAT_XRGB8888;
 87	case DRM_FORMAT_ARGB8888:
 88		return GUD_PIXEL_FORMAT_ARGB8888;
 89	}
 90
 91	return 0;
 92}
 93
 94static inline u32 gud_to_fourcc(u8 format)
 95{
 96	switch (format) {
 97	case GUD_PIXEL_FORMAT_R1:
 98		return GUD_DRM_FORMAT_R1;
 99	case GUD_PIXEL_FORMAT_XRGB1111:
100		return GUD_DRM_FORMAT_XRGB1111;
101	case GUD_PIXEL_FORMAT_RGB565:
102		return DRM_FORMAT_RGB565;
103	case GUD_PIXEL_FORMAT_XRGB8888:
104		return DRM_FORMAT_XRGB8888;
105	case GUD_PIXEL_FORMAT_ARGB8888:
106		return DRM_FORMAT_ARGB8888;
107	}
108
109	return 0;
110}
111
112static inline void gud_from_display_mode(struct gud_display_mode_req *dst,
113					 const struct drm_display_mode *src)
114{
115	u32 flags = src->flags & GUD_DISPLAY_MODE_FLAG_USER_MASK;
116
117	if (src->type & DRM_MODE_TYPE_PREFERRED)
118		flags |= GUD_DISPLAY_MODE_FLAG_PREFERRED;
119
120	dst->clock = cpu_to_le32(src->clock);
121	dst->hdisplay = cpu_to_le16(src->hdisplay);
122	dst->hsync_start = cpu_to_le16(src->hsync_start);
123	dst->hsync_end = cpu_to_le16(src->hsync_end);
124	dst->htotal = cpu_to_le16(src->htotal);
125	dst->vdisplay = cpu_to_le16(src->vdisplay);
126	dst->vsync_start = cpu_to_le16(src->vsync_start);
127	dst->vsync_end = cpu_to_le16(src->vsync_end);
128	dst->vtotal = cpu_to_le16(src->vtotal);
129	dst->flags = cpu_to_le32(flags);
130}
131
132static inline void gud_to_display_mode(struct drm_display_mode *dst,
133				       const struct gud_display_mode_req *src)
134{
135	u32 flags = le32_to_cpu(src->flags);
136
137	memset(dst, 0, sizeof(*dst));
138	dst->clock = le32_to_cpu(src->clock);
139	dst->hdisplay = le16_to_cpu(src->hdisplay);
140	dst->hsync_start = le16_to_cpu(src->hsync_start);
141	dst->hsync_end = le16_to_cpu(src->hsync_end);
142	dst->htotal = le16_to_cpu(src->htotal);
143	dst->vdisplay = le16_to_cpu(src->vdisplay);
144	dst->vsync_start = le16_to_cpu(src->vsync_start);
145	dst->vsync_end = le16_to_cpu(src->vsync_end);
146	dst->vtotal = le16_to_cpu(src->vtotal);
147	dst->flags = flags & GUD_DISPLAY_MODE_FLAG_USER_MASK;
148	dst->type = DRM_MODE_TYPE_DRIVER;
149	if (flags & GUD_DISPLAY_MODE_FLAG_PREFERRED)
150		dst->type |= DRM_MODE_TYPE_PREFERRED;
151	drm_mode_set_name(dst);
152}
153
154#endif