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path: root/drivers/gpu/drm/tinydrm/mipi-dbi.c
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Diffstat (limited to 'drivers/gpu/drm/tinydrm/mipi-dbi.c')
-rw-r--r--drivers/gpu/drm/tinydrm/mipi-dbi.c97
1 files changed, 63 insertions, 34 deletions
diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c
index 3a05e56f9b0d..918f77c7de34 100644
--- a/drivers/gpu/drm/tinydrm/mipi-dbi.c
+++ b/drivers/gpu/drm/tinydrm/mipi-dbi.c
@@ -10,18 +10,23 @@
*/
#include <linux/debugfs.h>
+#include <linux/delay.h>
#include <linux/dma-buf.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_fourcc.h>
#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_vblank.h>
+#include <drm/drm_rect.h>
#include <drm/tinydrm/mipi-dbi.h>
#include <drm/tinydrm/tinydrm-helpers.h>
-#include <uapi/drm/drm.h>
#include <video/mipi_display.h>
#define MIPI_DBI_MAX_SPI_READ_SPEED 2000000 /* 2MHz */
@@ -169,7 +174,7 @@ EXPORT_SYMBOL(mipi_dbi_command_buf);
* Zero on success, negative error code on failure.
*/
int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
- struct drm_clip_rect *clip, bool swap)
+ struct drm_rect *clip, bool swap)
{
struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
struct dma_buf_attachment *import_attach = cma_obj->base.import_attach;
@@ -208,58 +213,75 @@ int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
}
EXPORT_SYMBOL(mipi_dbi_buf_copy);
-static int mipi_dbi_fb_dirty(struct drm_framebuffer *fb,
- struct drm_file *file_priv,
- unsigned int flags, unsigned int color,
- struct drm_clip_rect *clips,
- unsigned int num_clips)
+static void mipi_dbi_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
{
struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
struct tinydrm_device *tdev = fb->dev->dev_private;
struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
+ unsigned int height = rect->y2 - rect->y1;
+ unsigned int width = rect->x2 - rect->x1;
bool swap = mipi->swap_bytes;
- struct drm_clip_rect clip;
int ret = 0;
bool full;
void *tr;
if (!mipi->enabled)
- return 0;
+ return;
- full = tinydrm_merge_clips(&clip, clips, num_clips, flags,
- fb->width, fb->height);
+ full = width == fb->width && height == fb->height;
- DRM_DEBUG("Flushing [FB:%d] x1=%u, x2=%u, y1=%u, y2=%u\n", fb->base.id,
- clip.x1, clip.x2, clip.y1, clip.y2);
+ DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
if (!mipi->dc || !full || swap ||
fb->format->format == DRM_FORMAT_XRGB8888) {
tr = mipi->tx_buf;
- ret = mipi_dbi_buf_copy(mipi->tx_buf, fb, &clip, swap);
+ ret = mipi_dbi_buf_copy(mipi->tx_buf, fb, rect, swap);
if (ret)
- return ret;
+ goto err_msg;
} else {
tr = cma_obj->vaddr;
}
mipi_dbi_command(mipi, MIPI_DCS_SET_COLUMN_ADDRESS,
- (clip.x1 >> 8) & 0xFF, clip.x1 & 0xFF,
- ((clip.x2 - 1) >> 8) & 0xFF, (clip.x2 - 1) & 0xFF);
+ (rect->x1 >> 8) & 0xff, rect->x1 & 0xff,
+ ((rect->x2 - 1) >> 8) & 0xff, (rect->x2 - 1) & 0xff);
mipi_dbi_command(mipi, MIPI_DCS_SET_PAGE_ADDRESS,
- (clip.y1 >> 8) & 0xFF, clip.y1 & 0xFF,
- ((clip.y2 - 1) >> 8) & 0xFF, (clip.y2 - 1) & 0xFF);
+ (rect->y1 >> 8) & 0xff, rect->y1 & 0xff,
+ ((rect->y2 - 1) >> 8) & 0xff, (rect->y2 - 1) & 0xff);
ret = mipi_dbi_command_buf(mipi, MIPI_DCS_WRITE_MEMORY_START, tr,
- (clip.x2 - clip.x1) * (clip.y2 - clip.y1) * 2);
-
- return ret;
+ width * height * 2);
+err_msg:
+ if (ret)
+ dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
}
-static const struct drm_framebuffer_funcs mipi_dbi_fb_funcs = {
- .destroy = drm_gem_fb_destroy,
- .create_handle = drm_gem_fb_create_handle,
- .dirty = tinydrm_fb_dirty,
-};
+/**
+ * mipi_dbi_pipe_update - Display pipe update helper
+ * @pipe: Simple display pipe
+ * @old_state: Old plane state
+ *
+ * This function handles framebuffer flushing and vblank events. Drivers can use
+ * this as their &drm_simple_display_pipe_funcs->update callback.
+ */
+void mipi_dbi_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))
+ mipi_dbi_fb_dirty(state->fb, &rect);
+
+ if (crtc->state->event) {
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+ crtc->state->event = NULL;
+ }
+}
+EXPORT_SYMBOL(mipi_dbi_pipe_update);
/**
* mipi_dbi_enable_flush - MIPI DBI enable helper
@@ -270,18 +292,25 @@ static const struct drm_framebuffer_funcs mipi_dbi_fb_funcs = {
* This function sets &mipi_dbi->enabled, flushes the whole framebuffer and
* enables the backlight. Drivers can use this in their
* &drm_simple_display_pipe_funcs->enable callback.
+ *
+ * Note: Drivers which don't use mipi_dbi_pipe_update() because they have custom
+ * framebuffer flushing, can't use this function since they both use the same
+ * flushing code.
*/
void mipi_dbi_enable_flush(struct mipi_dbi *mipi,
struct drm_crtc_state *crtc_state,
struct drm_plane_state *plane_state)
{
- struct tinydrm_device *tdev = &mipi->tinydrm;
struct drm_framebuffer *fb = plane_state->fb;
+ struct drm_rect rect = {
+ .x1 = 0,
+ .x2 = fb->width,
+ .y1 = 0,
+ .y2 = fb->height,
+ };
mipi->enabled = true;
- if (fb)
- tdev->fb_dirty(fb, NULL, 0, 0, NULL, 0);
-
+ mipi_dbi_fb_dirty(fb, &rect);
backlight_enable(mipi->backlight);
}
EXPORT_SYMBOL(mipi_dbi_enable_flush);
@@ -373,12 +402,10 @@ int mipi_dbi_init(struct device *dev, struct mipi_dbi *mipi,
if (!mipi->tx_buf)
return -ENOMEM;
- ret = devm_tinydrm_init(dev, tdev, &mipi_dbi_fb_funcs, driver);
+ ret = devm_tinydrm_init(dev, tdev, driver);
if (ret)
return ret;
- tdev->fb_dirty = mipi_dbi_fb_dirty;
-
/* TODO: Maybe add DRM_MODE_CONNECTOR_SPI */
ret = tinydrm_display_pipe_init(tdev, pipe_funcs,
DRM_MODE_CONNECTOR_VIRTUAL,
@@ -388,6 +415,8 @@ int mipi_dbi_init(struct device *dev, struct mipi_dbi *mipi,
if (ret)
return ret;
+ drm_plane_enable_fb_damage_clips(&tdev->pipe.plane);
+
tdev->drm->mode_config.preferred_depth = 16;
mipi->rotation = rotation;
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-16 04:26:19 +0300