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path: root/drivers/gpu/drm/tiny/gm12u320.c
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Diffstat (limited to 'drivers/gpu/drm/tiny/gm12u320.c')
-rw-r--r--drivers/gpu/drm/tiny/gm12u320.c72
1 files changed, 49 insertions, 23 deletions
diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c
index 33f65f4626e5..a233c86d428b 100644
--- a/drivers/gpu/drm/tiny/gm12u320.c
+++ b/drivers/gpu/drm/tiny/gm12u320.c
@@ -16,8 +16,9 @@
#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_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>
@@ -83,6 +84,7 @@ MODULE_PARM_DESC(eco_mode, "Turn on Eco mode (less bright, more silent)");
struct gm12u320_device {
struct drm_device dev;
+ struct device *dmadev;
struct drm_simple_display_pipe pipe;
struct drm_connector conn;
unsigned char *cmd_buf;
@@ -94,6 +96,7 @@ struct gm12u320_device {
struct drm_rect rect;
int frame;
int draw_status_timeout;
+ struct dma_buf_map src_map;
} fb_update;
};
@@ -250,7 +253,6 @@ 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;
- struct dma_buf_map map;
void *vaddr;
u8 *src;
@@ -264,20 +266,14 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
x2 = gm12u320->fb_update.rect.x2;
y1 = gm12u320->fb_update.rect.y1;
y2 = gm12u320->fb_update.rect.y2;
-
- ret = drm_gem_shmem_vmap(fb->obj[0], &map);
- if (ret) {
- GM12U320_ERR("failed to vmap fb: %d\n", ret);
- goto put_fb;
- }
- vaddr = map.vaddr; /* TODO: Use mapping abstraction properly */
+ vaddr = gm12u320->fb_update.src_map.vaddr; /* TODO: Use mapping abstraction properly */
if (fb->obj[0]->import_attach) {
ret = dma_buf_begin_cpu_access(
fb->obj[0]->import_attach->dmabuf, DMA_FROM_DEVICE);
if (ret) {
GM12U320_ERR("dma_buf_begin_cpu_access err: %d\n", ret);
- goto vunmap;
+ goto put_fb;
}
}
@@ -321,8 +317,6 @@ static void gm12u320_copy_fb_to_blocks(struct gm12u320_device *gm12u320)
if (ret)
GM12U320_ERR("dma_buf_end_cpu_access err: %d\n", ret);
}
-vunmap:
- drm_gem_shmem_vunmap(fb->obj[0], &map);
put_fb:
drm_framebuffer_put(fb);
gm12u320->fb_update.fb = NULL;
@@ -410,7 +404,7 @@ err:
GM12U320_ERR("Frame update error: %d\n", ret);
}
-static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb,
+static void gm12u320_fb_mark_dirty(struct drm_framebuffer *fb, const struct dma_buf_map *map,
struct drm_rect *dirty)
{
struct gm12u320_device *gm12u320 = to_gm12u320(fb->dev);
@@ -424,6 +418,7 @@ static void gm12u320_fb_mark_dirty(struct drm_framebuffer *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;
@@ -452,6 +447,7 @@ static void gm12u320_stop_fb_update(struct gm12u320_device *gm12u320)
mutex_lock(&gm12u320->fb_update.lock);
old_fb = gm12u320->fb_update.fb;
gm12u320->fb_update.fb = NULL;
+ dma_buf_map_clear(&gm12u320->fb_update.src_map);
mutex_unlock(&gm12u320->fb_update.lock);
drm_framebuffer_put(old_fb);
@@ -564,9 +560,10 @@ static void gm12u320_pipe_enable(struct drm_simple_display_pipe *pipe,
{
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, &rect);
+ gm12u320_fb_mark_dirty(plane_state->fb, &shadow_plane_state->map[0], &rect);
}
static void gm12u320_pipe_disable(struct drm_simple_display_pipe *pipe)
@@ -580,16 +577,18 @@ 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(pipe->plane.state->fb, &rect);
+ gm12u320_fb_mark_dirty(state->fb, &shadow_plane_state->map[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[] = {
@@ -601,6 +600,22 @@ static const uint64_t gm12u320_pipe_modifiers[] = {
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 = {
@@ -614,6 +629,7 @@ static const struct drm_driver gm12u320_drm_driver = {
.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 = {
@@ -640,15 +656,18 @@ static int gm12u320_usb_probe(struct usb_interface *interface,
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);
- dev = &gm12u320->dev;
-
ret = drmm_mode_config_init(dev);
if (ret)
- return ret;
+ goto err_put_device;
dev->mode_config.min_width = GM12U320_USER_WIDTH;
dev->mode_config.max_width = GM12U320_USER_WIDTH;
@@ -658,15 +677,15 @@ static int gm12u320_usb_probe(struct usb_interface *interface,
ret = gm12u320_usb_alloc(gm12u320);
if (ret)
- return ret;
+ goto err_put_device;
ret = gm12u320_set_ecomode(gm12u320);
if (ret)
- return ret;
+ goto err_put_device;
ret = gm12u320_conn_init(gm12u320);
if (ret)
- return ret;
+ goto err_put_device;
ret = drm_simple_display_pipe_init(&gm12u320->dev,
&gm12u320->pipe,
@@ -676,24 +695,31 @@ static int gm12u320_usb_probe(struct usb_interface *interface,
gm12u320_pipe_modifiers,
&gm12u320->conn);
if (ret)
- return ret;
+ goto err_put_device;
drm_mode_config_reset(dev);
usb_set_intfdata(interface, dev);
ret = drm_dev_register(dev, 0);
if (ret)
- return 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);
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-04 23:59:22 +0300