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/scatterlist.h>
  9#include <linux/usb.h>
 10#include <linux/workqueue.h>
 11#include <uapi/drm/drm_fourcc.h>
 12
 13#include <drm/drm_modes.h>
 14#include <drm/drm_simple_kms_helper.h>
 15
 16struct gud_device {
 17	struct drm_device drm;
 18	struct drm_simple_display_pipe pipe;
 19	struct device *dmadev;
 20	struct work_struct work;
 21	u32 flags;
 22	const struct drm_format_info *xrgb8888_emulation_format;
 23
 24	u16 *properties;
 25	unsigned int num_properties;
 26
 27	unsigned int bulk_pipe;
 28	void *bulk_buf;
 29	size_t bulk_len;
 30	struct sg_table bulk_sgt;
 31
 32	u8 compression;
 33	void *lz4_comp_mem;
 34	void *compress_buf;
 35
 36	u64 stats_length;
 37	u64 stats_actual_length;
 38	unsigned int stats_num_errors;
 39
 40	struct mutex ctrl_lock; /* Serialize get/set and status transfers */
 41
 42	struct mutex damage_lock; /* Protects the following members: */
 43	struct drm_framebuffer *fb;
 44	struct drm_rect damage;
 45	bool prev_flush_failed;
 46	void *shadow_buf;
 47};
 48
 49static inline struct gud_device *to_gud_device(struct drm_device *drm)
 50{
 51	return container_of(drm, struct gud_device, drm);
 52}
 53
 54static inline struct usb_device *gud_to_usb_device(struct gud_device *gdrm)
 55{
 56	return interface_to_usbdev(to_usb_interface(gdrm->drm.dev));
 57}
 58
 59int gud_usb_get(struct gud_device *gdrm, u8 request, u16 index, void *buf, size_t len);
 60int gud_usb_set(struct gud_device *gdrm, u8 request, u16 index, void *buf, size_t len);
 61int gud_usb_get_u8(struct gud_device *gdrm, u8 request, u16 index, u8 *val);
 62int gud_usb_set_u8(struct gud_device *gdrm, u8 request, u8 val);
 63
 64void gud_clear_damage(struct gud_device *gdrm);
 65void gud_flush_work(struct work_struct *work);
 66int gud_pipe_check(struct drm_simple_display_pipe *pipe,
 67		   struct drm_plane_state *new_plane_state,
 68		   struct drm_crtc_state *new_crtc_state);
 69void gud_pipe_update(struct drm_simple_display_pipe *pipe,
 70		     struct drm_plane_state *old_state);
 71int gud_connector_fill_properties(struct drm_connector_state *connector_state,
 72				  struct gud_property_req *properties);
 73int gud_get_connectors(struct gud_device *gdrm);
 74
 75/* Driver internal fourcc transfer formats */
 76#define GUD_DRM_FORMAT_R1		0x00000122
 77#define GUD_DRM_FORMAT_XRGB1111		0x03121722
 78
 79static inline u8 gud_from_fourcc(u32 fourcc)
 80{
 81	switch (fourcc) {
 82	case GUD_DRM_FORMAT_R1:
 83		return GUD_PIXEL_FORMAT_R1;
 84	case DRM_FORMAT_R8:
 85		return GUD_PIXEL_FORMAT_R8;
 86	case GUD_DRM_FORMAT_XRGB1111:
 87		return GUD_PIXEL_FORMAT_XRGB1111;
 88	case DRM_FORMAT_RGB332:
 89		return GUD_PIXEL_FORMAT_RGB332;
 90	case DRM_FORMAT_RGB565:
 91		return GUD_PIXEL_FORMAT_RGB565;
 92	case DRM_FORMAT_RGB888:
 93		return GUD_PIXEL_FORMAT_RGB888;
 94	case DRM_FORMAT_XRGB8888:
 95		return GUD_PIXEL_FORMAT_XRGB8888;
 96	case DRM_FORMAT_ARGB8888:
 97		return GUD_PIXEL_FORMAT_ARGB8888;
 98	}
 99
100	return 0;
101}
102
103static inline u32 gud_to_fourcc(u8 format)
104{
105	switch (format) {
106	case GUD_PIXEL_FORMAT_R1:
107		return GUD_DRM_FORMAT_R1;
108	case GUD_PIXEL_FORMAT_R8:
109		return DRM_FORMAT_R8;
110	case GUD_PIXEL_FORMAT_XRGB1111:
111		return GUD_DRM_FORMAT_XRGB1111;
112	case GUD_PIXEL_FORMAT_RGB332:
113		return DRM_FORMAT_RGB332;
114	case GUD_PIXEL_FORMAT_RGB565:
115		return DRM_FORMAT_RGB565;
116	case GUD_PIXEL_FORMAT_RGB888:
117		return DRM_FORMAT_RGB888;
118	case GUD_PIXEL_FORMAT_XRGB8888:
119		return DRM_FORMAT_XRGB8888;
120	case GUD_PIXEL_FORMAT_ARGB8888:
121		return DRM_FORMAT_ARGB8888;
122	}
123
124	return 0;
125}
126
127static inline void gud_from_display_mode(struct gud_display_mode_req *dst,
128					 const struct drm_display_mode *src)
129{
130	u32 flags = src->flags & GUD_DISPLAY_MODE_FLAG_USER_MASK;
131
132	if (src->type & DRM_MODE_TYPE_PREFERRED)
133		flags |= GUD_DISPLAY_MODE_FLAG_PREFERRED;
134
135	dst->clock = cpu_to_le32(src->clock);
136	dst->hdisplay = cpu_to_le16(src->hdisplay);
137	dst->hsync_start = cpu_to_le16(src->hsync_start);
138	dst->hsync_end = cpu_to_le16(src->hsync_end);
139	dst->htotal = cpu_to_le16(src->htotal);
140	dst->vdisplay = cpu_to_le16(src->vdisplay);
141	dst->vsync_start = cpu_to_le16(src->vsync_start);
142	dst->vsync_end = cpu_to_le16(src->vsync_end);
143	dst->vtotal = cpu_to_le16(src->vtotal);
144	dst->flags = cpu_to_le32(flags);
145}
146
147static inline void gud_to_display_mode(struct drm_display_mode *dst,
148				       const struct gud_display_mode_req *src)
149{
150	u32 flags = le32_to_cpu(src->flags);
151
152	memset(dst, 0, sizeof(*dst));
153	dst->clock = le32_to_cpu(src->clock);
154	dst->hdisplay = le16_to_cpu(src->hdisplay);
155	dst->hsync_start = le16_to_cpu(src->hsync_start);
156	dst->hsync_end = le16_to_cpu(src->hsync_end);
157	dst->htotal = le16_to_cpu(src->htotal);
158	dst->vdisplay = le16_to_cpu(src->vdisplay);
159	dst->vsync_start = le16_to_cpu(src->vsync_start);
160	dst->vsync_end = le16_to_cpu(src->vsync_end);
161	dst->vtotal = le16_to_cpu(src->vtotal);
162	dst->flags = flags & GUD_DISPLAY_MODE_FLAG_USER_MASK;
163	dst->type = DRM_MODE_TYPE_DRIVER;
164	if (flags & GUD_DISPLAY_MODE_FLAG_PREFERRED)
165		dst->type |= DRM_MODE_TYPE_PREFERRED;
166	drm_mode_set_name(dst);
167}
168
169#endif