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linux/linux-5.18.11/drivers/gpu/drm/tiny/gm12u320.c

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2024-03-22 18:12:32 +00:00
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2019 Hans de Goede <hdegoede@redhat.com>
*/
#include <linux/module.h>
#include <linux/usb.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_connector.h>
#include <drm/drm_damage_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_file.h>
#include <drm/drm_format_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_managed.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
static bool eco_mode;
module_param(eco_mode, bool, 0644);
MODULE_PARM_DESC(eco_mode, "Turn on Eco mode (less bright, more silent)");
#define DRIVER_NAME "gm12u320"
#define DRIVER_DESC "Grain Media GM12U320 USB projector display"
#define DRIVER_DATE "2019"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
/*
* The DLP has an actual width of 854 pixels, but that is not a multiple
* of 8, breaking things left and right, so we export a width of 848.
*/
#define GM12U320_USER_WIDTH 848
#define GM12U320_REAL_WIDTH 854
#define GM12U320_HEIGHT 480
#define GM12U320_BLOCK_COUNT 20
#define GM12U320_ERR(fmt, ...) \
DRM_DEV_ERROR(gm12u320->dev.dev, fmt, ##__VA_ARGS__)
#define MISC_RCV_EPT 1
#define DATA_RCV_EPT 2
#define DATA_SND_EPT 3
#define MISC_SND_EPT 4
#define DATA_BLOCK_HEADER_SIZE 84
#define DATA_BLOCK_CONTENT_SIZE 64512
#define DATA_BLOCK_FOOTER_SIZE 20
#define DATA_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \
DATA_BLOCK_CONTENT_SIZE + \
DATA_BLOCK_FOOTER_SIZE)
#define DATA_LAST_BLOCK_CONTENT_SIZE 4032
#define DATA_LAST_BLOCK_SIZE (DATA_BLOCK_HEADER_SIZE + \
DATA_LAST_BLOCK_CONTENT_SIZE + \
DATA_BLOCK_FOOTER_SIZE)
#define CMD_SIZE 31
#define READ_STATUS_SIZE 13
#define MISC_VALUE_SIZE 4
#define CMD_TIMEOUT msecs_to_jiffies(200)
#define DATA_TIMEOUT msecs_to_jiffies(1000)
#define IDLE_TIMEOUT msecs_to_jiffies(2000)
#define FIRST_FRAME_TIMEOUT msecs_to_jiffies(2000)
#define MISC_REQ_GET_SET_ECO_A 0xff
#define MISC_REQ_GET_SET_ECO_B 0x35
/* Windows driver does once every second, with arg d = 1, other args 0 */
#define MISC_REQ_UNKNOWN1_A 0xff
#define MISC_REQ_UNKNOWN1_B 0x38
/* Windows driver does this on init, with arg a, b = 0, c = 0xa0, d = 4 */
#define MISC_REQ_UNKNOWN2_A 0xa5
#define MISC_REQ_UNKNOWN2_B 0x00
struct gm12u320_device {
struct drm_device dev;
struct device *dmadev;
struct drm_simple_display_pipe pipe;
struct drm_connector conn;
unsigned char *cmd_buf;
unsigned char *data_buf[GM12U320_BLOCK_COUNT];
struct {
struct delayed_work work;
struct mutex lock;
struct drm_framebuffer *fb;
struct drm_rect rect;
int frame;
int draw_status_timeout;
struct iosys_map src_map;
} fb_update;
};
#define to_gm12u320(__dev) container_of(__dev, struct gm12u320_device, dev)
static const char cmd_data[CMD_SIZE] = {
0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
0x68, 0xfc, 0x00, 0x00, 0x00, 0x00, 0x10, 0xff,
0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x80, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static const char cmd_draw[CMD_SIZE] = {
0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xfe,
0x00, 0x00, 0x00, 0xc0, 0xd1, 0x05, 0x00, 0x40,
0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
};
static const char cmd_misc[CMD_SIZE] = {
0x55, 0x53, 0x42, 0x43, 0x00, 0x00, 0x00, 0x00,
0x04, 0x00, 0x00, 0x00, 0x80, 0x01, 0x10, 0xfd,
0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static const char data_block_header[DATA_BLOCK_HEADER_SIZE] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x04, 0x15, 0x00, 0x00, 0xfc, 0x00, 0x00,
0x01, 0x00, 0x00, 0xdb
};
static const char data_last_block_header[DATA_BLOCK_HEADER_SIZE] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xfb, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x2a, 0x00, 0x20, 0x00, 0xc0, 0x0f, 0x00, 0x00,
0x01, 0x00, 0x00, 0xd7
};
static const char data_block_footer[DATA_BLOCK_FOOTER_SIZE] = {
0xfb, 0x14, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x80, 0x00, 0x00, 0x4f
};
static inline struct usb_device *gm12u320_to_usb_device(struct gm12u320_device *gm12u320)
{
return interface_to_usbdev(to_usb_interface(gm12u320->dev.dev));
}
static int gm12u320_usb_alloc(struct gm12u320_device *gm12u320)
{
int i, block_size;
const char *hdr;
gm12u320->cmd_buf = drmm_kmalloc(&gm12u320->dev, CMD_SIZE, GFP_KERNEL);
if (!gm12u320->cmd_buf)
return -ENOMEM;
for (i = 0; i < GM12U320_BLOCK_COUNT; i++) {
if (i == GM12U320_BLOCK_COUNT - 1) {
block_size = DATA_LAST_BLOCK_SIZE;
hdr = data_last_block_header;
} else {
block_size = DATA_BLOCK_SIZE;
hdr = data_block_header;
}
gm12u320->data_buf[i] = drmm_kzalloc(&gm12u320->dev,
block_size, GFP_KERNEL);
if (!gm12u320->data_buf[i])
return -ENOMEM;
memcpy(gm12u320->data_buf[i], hdr, DATA_BLOCK_HEADER_SIZE);
memcpy(gm12u320->data_buf[i] +
(block_size - DATA_BLOCK_FOOTER_SIZE),
data_block_footer, DATA_BLOCK_FOOTER_SIZE);
}
return 0;
}
static int gm12u320_misc_request(struct gm12u320_device *gm12u320,
u8 req_a, u8 req_b,
u8 arg_a, u8 arg_b, u8 arg_c, u8 arg_d)
{
struct usb_device *udev = gm12u320_to_usb_device(gm12u320);
int ret, len;
memcpy(gm12u320->cmd_buf, &cmd_misc, CMD_SIZE);
gm12u320->cmd_buf[20] = req_a;
gm12u320->cmd_buf[21] = req_b;
gm12u320->cmd_buf[22] = arg_a;
gm12u320->cmd_buf[23] = arg_b;
gm12u320->cmd_buf[24] = arg_c;
gm12u320->cmd_buf[25] = arg_d;
/* Send request */
ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, MISC_SND_EPT),
gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
if (ret || len != CMD_SIZE) {
GM12U320_ERR("Misc. req. error %d\n", ret);
return -EIO;
}
/* Read value */
ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, MISC_RCV_EPT),
gm12u320->cmd_buf, MISC_VALUE_SIZE, &len,
DATA_TIMEOUT);
if (ret || len != MISC_VALUE_SIZE) {
GM12U320_ERR("Misc. value error %d\n", ret);
return -EIO;
}
/* cmd_buf[0] now contains the read value, which we don't use */
/* Read status */
ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, MISC_RCV_EPT),
gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
CMD_TIMEOUT);
if (ret || len != READ_STATUS_SIZE) {
GM12U320_ERR("Misc. status error %d\n", ret);
return -EIO;
}
return 0;
}
static void gm12u320_32bpp_to_24bpp_packed(u8 *dst, u8 *src, int len)
{
while (len--) {
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
src++;
}
}
static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
{
int block, dst_offset, len, remain, ret, x1, x2, y1, y2;
struct drm_framebuffer *fb;
void *vaddr;
u8 *src;
mutex_lock(&gm12u320->fb_update.lock);
if (!gm12u320->fb_update.fb)
goto unlock;
fb = gm12u320->fb_update.fb;
x1 = gm12u320->fb_update.rect.x1;
x2 = gm12u320->fb_update.rect.x2;
y1 = gm12u320->fb_update.rect.y1;
y2 = gm12u320->fb_update.rect.y2;
vaddr = gm12u320->fb_update.src_map.vaddr; /* TODO: Use mapping abstraction properly */
ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
if (ret) {
GM12U320_ERR("drm_gem_fb_begin_cpu_access err: %d\n", ret);
goto put_fb;
}
src = vaddr + y1 * fb->pitches[0] + x1 * 4;
x1 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
x2 += (GM12U320_REAL_WIDTH - GM12U320_USER_WIDTH) / 2;
for (; y1 < y2; y1++) {
remain = 0;
len = (x2 - x1) * 3;
dst_offset = (y1 * GM12U320_REAL_WIDTH + x1) * 3;
block = dst_offset / DATA_BLOCK_CONTENT_SIZE;
dst_offset %= DATA_BLOCK_CONTENT_SIZE;
if ((dst_offset + len) > DATA_BLOCK_CONTENT_SIZE) {
remain = dst_offset + len - DATA_BLOCK_CONTENT_SIZE;
len = DATA_BLOCK_CONTENT_SIZE - dst_offset;
}
dst_offset += DATA_BLOCK_HEADER_SIZE;
len /= 3;
gm12u320_32bpp_to_24bpp_packed(
gm12u320->data_buf[block] + dst_offset,
src, len);
if (remain) {
block++;
dst_offset = DATA_BLOCK_HEADER_SIZE;
gm12u320_32bpp_to_24bpp_packed(
gm12u320->data_buf[block] + dst_offset,
src + len * 4, remain / 3);
}
src += fb->pitches[0];
}
drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
put_fb:
drm_framebuffer_put(fb);
gm12u320->fb_update.fb = NULL;
unlock:
mutex_unlock(&gm12u320->fb_update.lock);
}
static void gm12u320_fb_update_work(struct work_struct *work)
{
struct gm12u320_device *gm12u320 =
container_of(to_delayed_work(work), struct gm12u320_device,
fb_update.work);
struct usb_device *udev = gm12u320_to_usb_device(gm12u320);
int block, block_size, len;
int ret = 0;
gm12u320_copy_fb_to_blocks(gm12u320);
for (block = 0; block < GM12U320_BLOCK_COUNT; block++) {
if (block == GM12U320_BLOCK_COUNT - 1)
block_size = DATA_LAST_BLOCK_SIZE;
else
block_size = DATA_BLOCK_SIZE;
/* Send data command to device */
memcpy(gm12u320->cmd_buf, cmd_data, CMD_SIZE);
gm12u320->cmd_buf[8] = block_size & 0xff;
gm12u320->cmd_buf[9] = block_size >> 8;
gm12u320->cmd_buf[20] = 0xfc - block * 4;
gm12u320->cmd_buf[21] =
block | (gm12u320->fb_update.frame << 7);
ret = usb_bulk_msg(udev,
usb_sndbulkpipe(udev, DATA_SND_EPT),
gm12u320->cmd_buf, CMD_SIZE, &len,
CMD_TIMEOUT);
if (ret || len != CMD_SIZE)
goto err;
/* Send data block to device */
ret = usb_bulk_msg(udev,
usb_sndbulkpipe(udev, DATA_SND_EPT),
gm12u320->data_buf[block], block_size,
&len, DATA_TIMEOUT);
if (ret || len != block_size)
goto err;
/* Read status */
ret = usb_bulk_msg(udev,
usb_rcvbulkpipe(udev, DATA_RCV_EPT),
gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
CMD_TIMEOUT);
if (ret || len != READ_STATUS_SIZE)
goto err;
}
/* Send draw command to device */
memcpy(gm12u320->cmd_buf, cmd_draw, CMD_SIZE);
ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, DATA_SND_EPT),
gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
if (ret || len != CMD_SIZE)
goto err;
/* Read status */
ret = usb_bulk_msg(udev, usb_rcvbulkpipe(udev, DATA_RCV_EPT),
gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
gm12u320->fb_update.draw_status_timeout);
if (ret || len != READ_STATUS_SIZE)
goto err;
gm12u320->fb_update.draw_status_timeout = CMD_TIMEOUT;
gm12u320->fb_update.frame = !gm12u320->fb_update.frame;
/*
* We must draw a frame every 2s otherwise the projector
* switches back to showing its logo.
*/
queue_delayed_work(system_long_wq, &gm12u320->fb_update.work,
IDLE_TIMEOUT);
return;
err:
/* Do not log errors caused by module unload or device unplug */
if (ret != -ENODEV && ret != -ECONNRESET && ret != -ESHUTDOWN)
GM12U320_ERR("Frame update error: %d\n", ret);
}
static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,
const struct iosys_map *map,
struct drm_rect *dirty)
{
struct gm12u320_device *gm12u320 = to_gm12u320(fb->dev);
struct drm_framebuffer *old_fb = NULL;
bool wakeup = false;
mutex_lock(&gm12u320->fb_update.lock);
if (gm12u320->fb_update.fb != fb) {
old_fb = gm12u320->fb_update.fb;
drm_framebuffer_get(fb);
gm12u320->fb_update.fb = fb;
gm12u320->fb_update.rect = *dirty;
gm12u320->fb_update.src_map = *map;
wakeup = true;
} else {
struct drm_rect *rect = &gm12u320->fb_update.rect;
rect->x1 = min(rect->x1, dirty->x1);
rect->y1 = min(rect->y1, dirty->y1);
rect->x2 = max(rect->x2, dirty->x2);
rect->y2 = max(rect->y2, dirty->y2);
}
mutex_unlock(&gm12u320->fb_update.lock);
if (wakeup)
mod_delayed_work(system_long_wq, &gm12u320->fb_update.work, 0);
if (old_fb)
drm_framebuffer_put(old_fb);
}
static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320)
{
struct drm_framebuffer *old_fb;
cancel_delayed_work_sync(&gm12u320->fb_update.work);
mutex_lock(&gm12u320->fb_update.lock);
old_fb = gm12u320->fb_update.fb;
gm12u320->fb_update.fb = NULL;
iosys_map_clear(&gm12u320->fb_update.src_map);
mutex_unlock(&gm12u320->fb_update.lock);
drm_framebuffer_put(old_fb);
}
static int gm12u320_set_ecomode(struct gm12u320_device *gm12u320)
{
return gm12u320_misc_request(gm12u320, MISC_REQ_GET_SET_ECO_A,
MISC_REQ_GET_SET_ECO_B, 0x01 /* set */,
eco_mode ? 0x01 : 0x00, 0x00, 0x01);
}
/* ------------------------------------------------------------------ */
/* gm12u320 connector */
/*
* We use fake EDID info so that userspace know that it is dealing with
* an Acer projector, rather then listing this as an "unknown" monitor.
* Note this assumes this driver is only ever used with the Acer C120, if we
* add support for other devices the vendor and model should be parameterized.
*/
static struct edid gm12u320_edid = {
.header = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 },
.mfg_id = { 0x04, 0x72 }, /* "ACR" */
.prod_code = { 0x20, 0xc1 }, /* C120h */
.serial = 0xaa55aa55,
.mfg_week = 1,
.mfg_year = 16,
.version = 1, /* EDID 1.3 */
.revision = 3, /* EDID 1.3 */
.input = 0x08, /* Analog input */
.features = 0x0a, /* Pref timing in DTD 1 */
.standard_timings = { { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 },
{ 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 } },
.detailed_timings = { {
.pixel_clock = 3383,
/* hactive = 848, hblank = 256 */
.data.pixel_data.hactive_lo = 0x50,
.data.pixel_data.hblank_lo = 0x00,
.data.pixel_data.hactive_hblank_hi = 0x31,
/* vactive = 480, vblank = 28 */
.data.pixel_data.vactive_lo = 0xe0,
.data.pixel_data.vblank_lo = 0x1c,
.data.pixel_data.vactive_vblank_hi = 0x10,
/* hsync offset 40 pw 128, vsync offset 1 pw 4 */
.data.pixel_data.hsync_offset_lo = 0x28,
.data.pixel_data.hsync_pulse_width_lo = 0x80,
.data.pixel_data.vsync_offset_pulse_width_lo = 0x14,
.data.pixel_data.hsync_vsync_offset_pulse_width_hi = 0x00,
/* Digital separate syncs, hsync+, vsync+ */
.data.pixel_data.misc = 0x1e,
}, {
.pixel_clock = 0,
.data.other_data.type = 0xfd, /* Monitor ranges */
.data.other_data.data.range.min_vfreq = 59,
.data.other_data.data.range.max_vfreq = 61,
.data.other_data.data.range.min_hfreq_khz = 29,
.data.other_data.data.range.max_hfreq_khz = 32,
.data.other_data.data.range.pixel_clock_mhz = 4, /* 40 MHz */
.data.other_data.data.range.flags = 0,
.data.other_data.data.range.formula.cvt = {
0xa0, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20 },
}, {
.pixel_clock = 0,
.data.other_data.type = 0xfc, /* Model string */
.data.other_data.data.str.str = {
'P', 'r', 'o', 'j', 'e', 'c', 't', 'o', 'r', '\n',
' ', ' ', ' ' },
}, {
.pixel_clock = 0,
.data.other_data.type = 0xfe, /* Unspecified text / padding */
.data.other_data.data.str.str = {
'\n', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
' ', ' ', ' ' },
} },
.checksum = 0x13,
};
static int gm12u320_conn_get_modes(struct drm_connector *connector)
{
drm_connector_update_edid_property(connector, &gm12u320_edid);
return drm_add_edid_modes(connector, &gm12u320_edid);
}
static const struct drm_connector_helper_funcs gm12u320_conn_helper_funcs = {
.get_modes = gm12u320_conn_get_modes,
};
static const struct drm_connector_funcs gm12u320_conn_funcs = {
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int gm12u320_conn_init(struct gm12u320_device *gm12u320)
{
drm_connector_helper_add(&gm12u320->conn, &gm12u320_conn_helper_funcs);
return drm_connector_init(&gm12u320->dev, &gm12u320->conn,
&gm12u320_conn_funcs, DRM_MODE_CONNECTOR_VGA);
}
/* ------------------------------------------------------------------ */
/* gm12u320 (simple) display pipe */
static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe,
struct drm_crtc_state *crtc_state,
struct drm_plane_state *plane_state)
{
struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT };
struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev);
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
gm12u320->fb_update.draw_status_timeout = FIRST_FRAME_TIMEOUT;
gm12u320_fb_mark_dirty(plane_state->fb, &shadow_plane_state->data[0], &rect);
}
static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe)
{
struct gm12u320_device *gm12u320 = to_gm12u320(pipe->crtc.dev);
gm12u320_stop_fb_update(gm12u320);
}
static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_state)
{
struct drm_plane_state *state = pipe->plane.state;
struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state);
struct drm_rect rect;
if (drm_atomic_helper_damage_merged(old_state, state, &rect))
gm12u320_fb_mark_dirty(state->fb, &shadow_plane_state->data[0], &rect);
}
static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = {
.enable = gm12u320_pipe_enable,
.disable = gm12u320_pipe_disable,
.update = gm12u320_pipe_update,
DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,
};
static const uint32_t gm12u320_pipe_formats[] = {
DRM_FORMAT_XRGB8888,
};
static const uint64_t gm12u320_pipe_modifiers[] = {
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_INVALID
};
/*
* FIXME: Dma-buf sharing requires DMA support by the importing device.
* This function is a workaround to make USB devices work as well.
* See todo.rst for how to fix the issue in the dma-buf framework.
*/
static struct drm_gem_object *gm12u320_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf)
{
struct gm12u320_device *gm12u320 = to_gm12u320(dev);
if (!gm12u320->dmadev)
return ERR_PTR(-ENODEV);
return drm_gem_prime_import_dev(dev, dma_buf, gm12u320->dmadev);
}
DEFINE_DRM_GEM_FOPS(gm12u320_fops);
static const struct drm_driver gm12u320_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.fops = &gm12u320_fops,
DRM_GEM_SHMEM_DRIVER_OPS,
.gem_prime_import = gm12u320_gem_prime_import,
};
static const struct drm_mode_config_funcs gm12u320_mode_config_funcs = {
.fb_create = drm_gem_fb_create_with_dirty,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
static int gm12u320_usb_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct gm12u320_device *gm12u320;
struct drm_device *dev;
int ret;
/*
* The gm12u320 presents itself to the system as 2 usb mass-storage
* interfaces, we only care about / need the first one.
*/
if (interface->cur_altsetting->desc.bInterfaceNumber != 0)
return -ENODEV;
gm12u320 = devm_drm_dev_alloc(&interface->dev, &gm12u320_drm_driver,
struct gm12u320_device, dev);
if (IS_ERR(gm12u320))
return PTR_ERR(gm12u320);
dev = &gm12u320->dev;
gm12u320->dmadev = usb_intf_get_dma_device(to_usb_interface(dev->dev));
if (!gm12u320->dmadev)
drm_warn(dev, "buffer sharing not supported"); /* not an error */
INIT_DELAYED_WORK(&gm12u320->fb_update.work, gm12u320_fb_update_work);
mutex_init(&gm12u320->fb_update.lock);
ret = drmm_mode_config_init(dev);
if (ret)
goto err_put_device;
dev->mode_config.min_width = GM12U320_USER_WIDTH;
dev->mode_config.max_width = GM12U320_USER_WIDTH;
dev->mode_config.min_height = GM12U320_HEIGHT;
dev->mode_config.max_height = GM12U320_HEIGHT;
dev->mode_config.funcs = &gm12u320_mode_config_funcs;
ret = gm12u320_usb_alloc(gm12u320);
if (ret)
goto err_put_device;
ret = gm12u320_set_ecomode(gm12u320);
if (ret)
goto err_put_device;
ret = gm12u320_conn_init(gm12u320);
if (ret)
goto err_put_device;
ret = drm_simple_display_pipe_init(&gm12u320->dev,
&gm12u320->pipe,
&gm12u320_pipe_funcs,
gm12u320_pipe_formats,
ARRAY_SIZE(gm12u320_pipe_formats),
gm12u320_pipe_modifiers,
&gm12u320->conn);
if (ret)
goto err_put_device;
drm_mode_config_reset(dev);
usb_set_intfdata(interface, dev);
ret = drm_dev_register(dev, 0);
if (ret)
goto err_put_device;
drm_fbdev_generic_setup(dev, 0);
return 0;
err_put_device:
put_device(gm12u320->dmadev);
return ret;
}
static void gm12u320_usb_disconnect(struct usb_interface *interface)
{
struct drm_device *dev = usb_get_intfdata(interface);
struct gm12u320_device *gm12u320 = to_gm12u320(dev);
put_device(gm12u320->dmadev);
gm12u320->dmadev = NULL;
drm_dev_unplug(dev);
drm_atomic_helper_shutdown(dev);
}
static __maybe_unused int gm12u320_suspend(struct usb_interface *interface,
pm_message_t message)
{
struct drm_device *dev = usb_get_intfdata(interface);
return drm_mode_config_helper_suspend(dev);
}
static __maybe_unused int gm12u320_resume(struct usb_interface *interface)
{
struct drm_device *dev = usb_get_intfdata(interface);
struct gm12u320_device *gm12u320 = to_gm12u320(dev);
gm12u320_set_ecomode(gm12u320);
return drm_mode_config_helper_resume(dev);
}
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x1de1, 0xc102) },
{},
};
MODULE_DEVICE_TABLE(usb, id_table);
static struct usb_driver gm12u320_usb_driver = {
.name = "gm12u320",
.probe = gm12u320_usb_probe,
.disconnect = gm12u320_usb_disconnect,
.id_table = id_table,
#ifdef CONFIG_PM
.suspend = gm12u320_suspend,
.resume = gm12u320_resume,
.reset_resume = gm12u320_resume,
#endif
};
module_usb_driver(gm12u320_usb_driver);
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_LICENSE("GPL");