From: Rob Clark <rob@xxxxxx>
Break the mutable state of a plane out into a separate structure.
This makes it easier to have some helpers for plane->set_property()
and for checking for invalid params. The idea is that individual
drivers can wrap the state struct in their own struct which adds
driver specific parameters, for easy build-up of state across
multiple set_property() calls and for easy atomic commit or roll-
back.
The same should be done for CRTC, encoder, and connector, but this
patch only includes the first part (plane).
---
drivers/gpu/drm/drm_crtc.c | 97 +++++++++++++++++++++++++++++++++++++++++---
include/drm/drm_crtc.h | 38 +++++++++++++----
2 files changed, 123 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index e680fbe..ce6fa6a 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -411,7 +411,7 @@ void drm_framebuffer_remove(struct drm_framebuffer *fb)
}
list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
- if (plane->fb == fb) {
+ if (plane->state->fb == fb) {
/* should turn off the crtc */
drm_mode_plane_set_obj_prop(plane, state, config->prop_crtc_id, 0);
drm_mode_plane_set_obj_prop(plane, state, config->prop_fb_id, 0);
@@ -747,6 +747,93 @@ void drm_plane_cleanup(struct drm_plane *plane)
}
EXPORT_SYMBOL(drm_plane_cleanup);
+int drm_plane_check_state(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ unsigned int fb_width, fb_height;
+ struct drm_framebuffer *fb = state->fb;
+ int i;
+
+ fb_width = fb->width << 16;
+ fb_height = fb->height << 16;
+
+ /* Check whether this plane supports the fb pixel format. */
+ for (i = 0; i < plane->format_count; i++)
+ if (fb->pixel_format == plane->format_types[i])
+ break;
+ if (i == plane->format_count) {
+ DRM_DEBUG_KMS("Invalid pixel format 0x%08x\n", fb->pixel_format);
+ return -EINVAL;
+ }
+
+ /* Make sure source coordinates are inside the fb. */
+ if (state->src_w > fb_width ||
+ state->src_x > fb_width - state->src_w ||
+ state->src_h > fb_height ||
+ state->src_y > fb_height - state->src_h) {
+ DRM_DEBUG_KMS("Invalid source coordinates "
+ "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
+ state->src_w >> 16,
+ ((state->src_w & 0xffff) * 15625) >> 10,
+ state->src_h >> 16,
+ ((state->src_h & 0xffff) * 15625) >> 10,
+ state->src_x >> 16,
+ ((state->src_x & 0xffff) * 15625) >> 10,
+ state->src_y >> 16,
+ ((state->src_y & 0xffff) * 15625) >> 10);
+ return -ENOSPC;
+ }
+
+ /* Give drivers some help against integer overflows */
+ if (state->crtc_w > INT_MAX ||
+ state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
+ state->crtc_h > INT_MAX ||
+ state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
+ DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
+ state->crtc_w, state->crtc_h,
+ state->crtc_x, state->crtc_y);
+ return -ERANGE;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_plane_check_state);
+
+int drm_plane_set_property(struct drm_plane *plane,
+ struct drm_plane_state *state,
+ struct drm_property *property, uint64_t value)
+{
+ struct drm_device *dev = plane->dev;
+ struct drm_mode_config *config = &dev->mode_config;
+
+ if (property == config->prop_fb_id) {
+ state->fb = U642VOID(value);
+ } else if (property == config->prop_crtc_id) {
+ state->crtc = U642VOID(value);
+ } else if (property == config->prop_crtc_x) {
+ state->crtc_x = *(int32_t *)&value;
+ } else if (property == config->prop_crtc_y) {
+ state->crtc_y = *(int32_t *)&value;
+ } else if (property == config->prop_crtc_w) {
+ state->crtc_w = value;
+ } else if (property == config->prop_crtc_h) {
+ state->crtc_h = value;
+ } else if (property == config->prop_src_x) {
+ state->src_x = value;
+ } else if (property == config->prop_src_y) {
+ state->src_y = value;
+ } else if (property == config->prop_src_w) {
+ state->src_w = value;
+ } else if (property == config->prop_src_h) {
+ state->src_h = value;
+ } else {
+ return -EINVAL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_plane_set_property);
+
/**
* drm_mode_create - create a new display mode
* @dev: DRM device
@@ -1790,13 +1877,13 @@ int drm_mode_getplane(struct drm_device *dev, void *data,
}
plane = obj_to_plane(obj);
- if (plane->crtc)
- plane_resp->crtc_id = plane->crtc->base.id;
+ if (plane->state->crtc)
+ plane_resp->crtc_id = plane->state->crtc->base.id;
else
plane_resp->crtc_id = 0;
- if (plane->fb)
- plane_resp->fb_id = plane->fb->base.id;
+ if (plane->state->fb)
+ plane_resp->fb_id = plane->state->fb->base.id;
else
plane_resp->fb_id = 0;
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 546026c..a2ba164 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -628,6 +628,26 @@ struct drm_plane_funcs {
};
/**
+ * drm_plane_state - mutable plane state
+ * @crtc: currently bound CRTC
+ * @fb: currently bound fb
+ * @enabled: enabled flag
+ */
+struct drm_plane_state {
+ struct drm_crtc *crtc;
+ struct drm_framebuffer *fb;
+ bool enabled;
+
+ /* Signed dest location allows it to be partially off screen */
+ int32_t crtc_x, crtc_y;
+ uint32_t crtc_w, crtc_h;
+
+ /* Source values are 16.16 fixed point */
+ uint32_t src_x, src_y;
+ uint32_t src_h, src_w;
+};
+
+/**
* drm_plane - central DRM plane control structure
* @dev: DRM device this plane belongs to
* @head: for list management
@@ -635,11 +655,9 @@ struct drm_plane_funcs {
* @possible_crtcs: pipes this plane can be bound to
* @format_types: array of formats supported by this plane
* @format_count: number of formats supported
- * @crtc: currently bound CRTC
- * @fb: currently bound fb
+ * @state: the mutable state
* @gamma_size: size of gamma table
* @gamma_store: gamma correction table
- * @enabled: enabled flag
* @funcs: helper functions
* @helper_private: storage for drver layer
* @properties: property tracking for this plane
@@ -654,15 +672,16 @@ struct drm_plane {
uint32_t *format_types;
uint32_t format_count;
- struct drm_crtc *crtc;
- struct drm_framebuffer *fb;
+ /*
+ * State that can be updated from userspace, and atomically
+ * commited or rolled back:
+ */
+ struct drm_plane_state *state;
/* CRTC gamma size for reporting to userspace */
uint32_t gamma_size;
uint16_t *gamma_store;
- bool enabled;
-
const struct drm_plane_funcs *funcs;
void *helper_private;
@@ -874,6 +893,11 @@ extern int drm_plane_init(struct drm_device *dev,
const uint32_t *formats, uint32_t format_count,
bool priv);
extern void drm_plane_cleanup(struct drm_plane *plane);
+extern int drm_plane_check_state(struct drm_plane *plane,
+ struct drm_plane_state *state);
+extern int drm_plane_set_property(struct drm_plane *plane,
+ struct drm_plane_state *state,
+ struct drm_property *property, uint64_t value);
extern void drm_encoder_cleanup(struct drm_encoder *encoder);
--
1.7.9.5
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