---
MAINTAINERS | 6 +
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/gm12u320/Kconfig | 9 +
drivers/gpu/drm/gm12u320/Makefile | 2 +
drivers/gpu/drm/gm12u320/gm12u320.c | 815 ++++++++++++++++++++++++++++
6 files changed, 835 insertions(+)
create mode 100644 drivers/gpu/drm/gm12u320/Kconfig
create mode 100644 drivers/gpu/drm/gm12u320/Makefile
create mode 100644 drivers/gpu/drm/gm12u320/gm12u320.c
diff --git a/MAINTAINERS b/MAINTAINERS
index e2db0d467966..3290bcfe67b2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5025,6 +5025,12 @@ S: Maintained
F: drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
F: Documentation/devicetree/bindings/display/panel/feiyang,fy07024di26a30d.txt
+DRM DRIVER FOR GRAIN MEDIA GM12U320 PROJECTORS
+M: Hans de Goede <hdegoede@xxxxxxxxxx>
+T: git git://anongit.freedesktop.org/drm/drm-misc
+S: Maintained
+F: drivers/gpu/drm/gm12u320/
+
DRM DRIVER FOR ILITEK ILI9225 PANELS
M: David Lechner <david@xxxxxxxxxxxxxx>
S: Maintained
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 36f900d63979..af82002825ed 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -343,6 +343,8 @@ source "drivers/gpu/drm/panfrost/Kconfig"
source "drivers/gpu/drm/aspeed/Kconfig"
+source "drivers/gpu/drm/gm12u320/Kconfig"
+
# Keep legacy drivers last
menuconfig DRM_LEGACY
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 72f5036d9bfa..8a4f851f54a2 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -113,3 +113,4 @@ obj-$(CONFIG_DRM_VBOXVIDEO) += vboxvideo/
obj-$(CONFIG_DRM_LIMA) += lima/
obj-$(CONFIG_DRM_PANFROST) += panfrost/
obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
+obj-$(CONFIG_DRM_GM12U320) += gm12u320/
diff --git a/drivers/gpu/drm/gm12u320/Kconfig b/drivers/gpu/drm/gm12u320/Kconfig
new file mode 100644
index 000000000000..0882a61c04d5
--- /dev/null
+++ b/drivers/gpu/drm/gm12u320/Kconfig
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0+
+config DRM_GM12U320
+ tristate "GM12U320 driver for USB projectors"
+ depends on DRM && USB
+ select DRM_KMS_HELPER
+ select DRM_GEM_SHMEM_HELPER
+ help
+ This is a KMS driver for projectors which use the GM12U320 chipset
+ for video transfer over USB2/3, such as the Acer C120 mini projector.
diff --git a/drivers/gpu/drm/gm12u320/Makefile b/drivers/gpu/drm/gm12u320/Makefile
new file mode 100644
index 000000000000..ea514382f00d
--- /dev/null
+++ b/drivers/gpu/drm/gm12u320/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0+
+obj-$(CONFIG_DRM_GM12U320) += gm12u320.o
diff --git a/drivers/gpu/drm/gm12u320/gm12u320.c b/drivers/gpu/drm/gm12u320/gm12u320.c
new file mode 100644
index 000000000000..3dfe86defefc
--- /dev/null
+++ b/drivers/gpu/drm/gm12u320/gm12u320.c
@@ -0,0 +1,815 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2019 Hans de Goede <hdegoede@xxxxxxxxxx>
+ */
+
+#include <linux/dma-buf.h>
+#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_shmem_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_ioctl.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_vblank.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
+#define DRIVER_PATCHLEVEL 1
+
+/*
+ * 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 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 drm_simple_display_pipe pipe;
+ struct drm_connector conn;
+ struct usb_device *udev;
+ unsigned char *cmd_buf;
+ unsigned char *data_buf[GM12U320_BLOCK_COUNT];
+ bool pipe_enabled;
+ struct {
+ bool run;
+ struct workqueue_struct *workq;
+ struct work_struct work;
+ wait_queue_head_t waitq;
+ struct mutex lock;
+ struct drm_framebuffer *fb;
+ struct drm_rect rect;
+ } fb_update;
+};
+
+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 int gm12u320_usb_alloc(struct gm12u320_device *gm12u320)
+{
+ int i, block_size;
+ const char *hdr;
+
+ gm12u320->cmd_buf = kmalloc(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] = kzalloc(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);
+ }
+
+ gm12u320->fb_update.workq = create_singlethread_workqueue(DRIVER_NAME);
+ if (!gm12u320->fb_update.workq)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void gm12u320_usb_free(struct gm12u320_device *gm12u320)
+{
+ int i;
+
+ if (gm12u320->fb_update.workq)
+ destroy_workqueue(gm12u320->fb_update.workq);
+
+ for (i = 0; i < GM12U320_BLOCK_COUNT; i++)
+ kfree(gm12u320->data_buf[i]);
+
+ kfree(gm12u320->cmd_buf);
+}
+
+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)
+{
+ 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(gm12u320->udev,
+ usb_sndbulkpipe(gm12u320->udev, MISC_SND_EPT),
+ gm12u320->cmd_buf, CMD_SIZE, &len, CMD_TIMEOUT);
+ if (ret || len != CMD_SIZE) {
+ dev_err(&gm12u320->udev->dev, "Misc. req. error %d\n", ret);
+ return -EIO;
+ }
+
+ /* Read value */
+ ret = usb_bulk_msg(gm12u320->udev,
+ usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT),
+ gm12u320->cmd_buf, MISC_VALUE_SIZE, &len,
+ DATA_TIMEOUT);
+ if (ret || len != MISC_VALUE_SIZE) {
+ dev_err(&gm12u320->udev->dev, "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(gm12u320->udev,
+ usb_rcvbulkpipe(gm12u320->udev, MISC_RCV_EPT),
+ gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
+ CMD_TIMEOUT);
+ if (ret || len != READ_STATUS_SIZE) {
+ dev_err(&gm12u320->udev->dev, "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 = drm_gem_shmem_vmap(fb->obj[0]);
+ if (IS_ERR(vaddr)) {
+ DRM_ERROR("failed to vmap fb: %ld\n", PTR_ERR(vaddr));
+ goto put_fb;
+ }
+
+ if (fb->obj[0]->import_attach) {
+ ret = dma_buf_begin_cpu_access(
+ fb->obj[0]->import_attach->dmabuf, DMA_FROM_DEVICE);
+ if (ret) {
+ DRM_ERROR("dma_buf_begin_cpu_access err: %d\n", ret);
+ goto vunmap;
+ }
+ }
+
+ 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];
+ }
+
+ if (fb->obj[0]->import_attach) {
+ ret = dma_buf_end_cpu_access(fb->obj[0]->import_attach->dmabuf,
+ DMA_FROM_DEVICE);
+ if (ret)
+ DRM_ERROR("dma_buf_end_cpu_access err: %d\n", ret);
+ }
+vunmap:
+ drm_gem_shmem_vunmap(fb->obj[0], vaddr);
+put_fb:
+ drm_framebuffer_put(fb);
+ gm12u320->fb_update.fb = NULL;
+unlock:
+ mutex_unlock(&gm12u320->fb_update.lock);
+}
+
+static int gm12u320_fb_update_ready(struct gm12u320_device *gm12u320)
+{
+ int ret;
+
+ mutex_lock(&gm12u320->fb_update.lock);
+ ret = !gm12u320->fb_update.run || gm12u320->fb_update.fb != NULL;
+ mutex_unlock(&gm12u320->fb_update.lock);
+
+ return ret;
+}
+
+static void gm12u320_fb_update_work(struct work_struct *work)
+{
+ struct gm12u320_device *gm12u320 =
+ container_of(work, struct gm12u320_device, fb_update.work);
+ int draw_status_timeout = FIRST_FRAME_TIMEOUT;
+ int block, block_size, len;
+ int frame = 0;
+ int ret = 0;
+
+ while (gm12u320->fb_update.run) {
+ 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 | (frame << 7);
+
+ ret = usb_bulk_msg(gm12u320->udev,
+ usb_sndbulkpipe(gm12u320->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(gm12u320->udev,
+ usb_sndbulkpipe(gm12u320->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(gm12u320->udev,
+ usb_rcvbulkpipe(gm12u320->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(gm12u320->udev,
+ usb_sndbulkpipe(gm12u320->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(gm12u320->udev,
+ usb_rcvbulkpipe(gm12u320->udev, DATA_RCV_EPT),
+ gm12u320->cmd_buf, READ_STATUS_SIZE, &len,
+ draw_status_timeout);
+ if (ret || len != READ_STATUS_SIZE)
+ goto err;
+
+ draw_status_timeout = CMD_TIMEOUT;
+ frame = !frame;
+
+ /*
+ * We must draw a frame every 2s otherwise the projector
+ * switches back to showing its logo.
+ */
+ wait_event_timeout(gm12u320->fb_update.waitq,
+ gm12u320_fb_update_ready(gm12u320),
+ IDLE_TIMEOUT);
+ }
+ return;
+err:
+ /* Do not log errors caused by module unload or device unplug */
+ if (ret != -ECONNRESET && ret != -ESHUTDOWN)
+ dev_err(&gm12u320->udev->dev, "Frame update error: %d\n", ret);
+}
+
+static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,
+ struct drm_rect *dirty)
+{
+ struct gm12u320_device *gm12u320 = fb->dev->dev_private;
+ 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;
+ 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)
+ wake_up(&gm12u320->fb_update.waitq);
+
+ if (old_fb)
+ drm_framebuffer_put(old_fb);
+}
+
+static void gm12u320_start_fb_update(struct gm12u320_device *gm12u320)
+{
+ mutex_lock(&gm12u320->fb_update.lock);
+ gm12u320->fb_update.run = true;
+ mutex_unlock(&gm12u320->fb_update.lock);
+
+ queue_work(gm12u320->fb_update.workq, &gm12u320->fb_update.work);
+}
+
+static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320)
+{
+ mutex_lock(&gm12u320->fb_update.lock);
+ gm12u320->fb_update.run = false;
+ mutex_unlock(&gm12u320->fb_update.lock);
+
+ wake_up(&gm12u320->fb_update.waitq);
+ cancel_work_sync(&gm12u320->fb_update.work);
+
+ mutex_lock(&gm12u320->fb_update.lock);
+ if (gm12u320->fb_update.fb) {
+ drm_framebuffer_put(gm12u320->fb_update.fb);
+ gm12u320->fb_update.fb = NULL;
+ }
+ mutex_unlock(&gm12u320->fb_update.lock);
+}
+
+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 gm12u320_device *gm12u320 = pipe->crtc.dev->dev_private;
+ struct drm_rect rect = { 0, 0, GM12U320_USER_WIDTH, GM12U320_HEIGHT };
+
+ gm12u320_fb_mark_dirty(plane_state->fb, &rect);
+ gm12u320_start_fb_update(gm12u320);
+ gm12u320->pipe_enabled = true;
+}
+
+static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+ struct gm12u320_device *gm12u320 = pipe->crtc.dev->dev_private;
+
+ gm12u320_stop_fb_update(gm12u320);
+ gm12u320->pipe_enabled = false;
+}
+
+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_crtc *crtc = &pipe->crtc;
+ struct drm_rect rect;
+
+ if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+ gm12u320_fb_mark_dirty(pipe->plane.state->fb, &rect);
+
+ if (crtc->state->event) {
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ crtc->state->event = NULL;
+ spin_unlock_irq(&crtc->dev->event_lock);
+ }
+}
+
+static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = {
+ .enable = gm12u320_pipe_enable,
+ .disable = gm12u320_pipe_disable,
+ .update = gm12u320_pipe_update,
+};
+
+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
+};
+
+static void gm12u320_driver_release(struct drm_device *dev)
+{
+ struct gm12u320_device *gm12u320 = dev->dev_private;
+
+ gm12u320_usb_free(gm12u320);
+ drm_mode_config_cleanup(dev);
+ drm_dev_fini(dev);
+ kfree(gm12u320);
+}
+
+DEFINE_DRM_GEM_SHMEM_FOPS(gm12u320_fops);
+
+static struct drm_driver gm12u320_drm_driver = {
+ .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC |
+ DRIVER_PRIME,
+
+ .name = DRIVER_NAME,
+ .desc = DRIVER_DESC,
+ .date = DRIVER_DATE,
+ .major = DRIVER_MAJOR,
+ .minor = DRIVER_MINOR,
+
+ .release = gm12u320_driver_release,
+ .fops = &gm12u320_fops,
+ DRM_GEM_SHMEM_DRIVER_OPS,
+};
+
+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 = kzalloc(sizeof(*gm12u320), GFP_KERNEL);
+ if (gm12u320 == NULL)
+ return -ENOMEM;
+
+ gm12u320->udev = interface_to_usbdev(interface);
+ INIT_WORK(&gm12u320->fb_update.work, gm12u320_fb_update_work);
+ mutex_init(&gm12u320->fb_update.lock);
+ init_waitqueue_head(&gm12u320->fb_update.waitq);
+
+ dev = &gm12u320->dev;
+ ret = drm_dev_init(dev, &gm12u320_drm_driver, &interface->dev);
+ if (ret) {
+ kfree(gm12u320);
+ return ret;
+ }
+ dev->dev_private = gm12u320;
+
+ drm_mode_config_init(dev);
+ 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;
+
+ ret = gm12u320_set_ecomode(gm12u320);
+ if (ret)
+ goto err_put;
+
+ ret = gm12u320_conn_init(gm12u320);
+ if (ret)
+ goto err_put;
+
+ 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;
+
+ drm_mode_config_reset(dev);
+
+ usb_set_intfdata(interface, dev);
+ ret = drm_dev_register(dev, 0);
+ if (ret)
+ goto err_put;
+
+ drm_fbdev_generic_setup(dev, dev->mode_config.preferred_depth);
+
+ return 0;
+
+err_put:
+ drm_dev_put(dev);
+ return ret;
+}
+
+static void gm12u320_usb_disconnect(struct usb_interface *interface)
+{
+ struct drm_device *dev = usb_get_intfdata(interface);
+ struct gm12u320_device *gm12u320 = dev->dev_private;
+
+ gm12u320_stop_fb_update(gm12u320);
+ drm_dev_unplug(dev);
+ drm_dev_put(dev);
+}
+
+#ifdef CONFIG_PM
+static int gm12u320_suspend(struct usb_interface *interface,
+ pm_message_t message)
+{
+ struct drm_device *dev = usb_get_intfdata(interface);
+ struct gm12u320_device *gm12u320 = dev->dev_private;
+
+ if (gm12u320->pipe_enabled)
+ gm12u320_stop_fb_update(gm12u320);
+
+ return 0;
+}
+
+static int gm12u320_resume(struct usb_interface *interface)
+{
+ struct drm_device *dev = usb_get_intfdata(interface);
+ struct gm12u320_device *gm12u320 = dev->dev_private;
+
+ gm12u320_set_ecomode(gm12u320);
+ if (gm12u320->pipe_enabled)
+ gm12u320_start_fb_update(gm12u320);
+
+ return 0;
+}
+#endif
+
+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@xxxxxxxxxx>");
+MODULE_LICENSE("GPL");
