On Sun, Jul 21, 2019 at 03:25:25PM +0200, Hans de Goede wrote:
> Add a modesetting driver for Grain Media GM12U320 based devices
> (primarily Acer C120 projector, but there may be compatible devices).
>
> This is based on the fb driver from Viacheslav Nurmekhamitov:
> https://github.com/slavrn/gm12u320
>
> This driver uses drm_simple_display_pipe to deal with all the atomic
> stuff, gem_shmem_helper functions for buffer management and
> drm_fbdev_generic_setup for fbdev emulation, so that leaves the driver
> itself with only the actual code for talking to the gm13u320 chip,
> leading to a nice simple and clean driver.
>
> Changes in v2:
> -Add drm-misc tree to MAINTAINERS
> -Drop mode_config.preferred_depth = 24 / fix fbdev support
>
> Reviewed-by: Noralf Trønnes <nor...@tronnes.org>
> Signed-off-by: Hans de Goede <hdego...@redhat.com>
> ---
> 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 ++++++++++++++++++++++++++++
Hm I thought Noralf's plan was to collect all such tiny drivers into
drm/tinydrm (or drm/tiny). I kinda like that idea, instead of litering the
top level with tons of directories and forcing everyone to create a new
Makefile/Kconfig.
Maybe we could move this as part of the tinydrm->tiny/ rename?
-Daniel
> 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 <hdego...@redhat.com>
> +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 <da...@lechnology.com>
> 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 <hdego...@redhat.com>
> + */
> +
> +#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 <hdego...@redhat.com>");
> +MODULE_LICENSE("GPL");
> --
> 2.21.0
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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