Add a new helper, to be used later for blob property management, that
sets the mode for a CRTC state, as well as updating the CRTC enable/active
state at the same time.
v2: Do not touch active/mode_changed in CRTC state. Document return
value. Remove stray drm_atomic_set_mode_prop_for_crtc declaration.
v3: Remove i915 changes, and leave it directly bashing crtc_state->mode
for the meantime.
Signed-off-by: Daniel Stone <daniels@xxxxxxxxxxxxx>
Tested-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
---
drivers/gpu/drm/drm_atomic.c | 36 ++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/drm_atomic_helper.c | 11 ++++++++---
drivers/gpu/drm/drm_crtc_helper.c | 5 +++--
include/drm/drm_atomic.h | 3 +++
4 files changed, 50 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 3134f50..e749287 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -290,6 +290,42 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state,
EXPORT_SYMBOL(drm_atomic_get_crtc_state);
/**
+ * drm_atomic_set_mode_for_crtc - set mode for CRTC
+ * @state: the CRTC whose incoming state to update
+ * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
+ *
+ * Set a mode (originating from the kernel) on the desired CRTC state. Does
+ * not change any other state properties, including enable, active, or
+ * mode_changed.
+ *
+ * RETURNS:
+ * Zero on success, error code on failure. Cannot return -EDEADLK.
+ */
+int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
+ struct drm_display_mode *mode)
+{
+ /* Early return for no change. */
+ if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
+ return 0;
+
+ if (mode) {
+ drm_mode_copy(&state->mode, mode);
+ state->enable = true;
+ DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
+ mode->name, state);
+ } else {
+ memset(&state->mode, 0, sizeof(state->mode));
+ state->enable = false;
+ DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
+ state);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
+
+
+/**
* drm_atomic_crtc_set_property - set property on CRTC
* @crtc: the drm CRTC to set a property on
* @state: the state object to update with the new property value
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index a64bacd..e69d484 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1607,7 +1607,10 @@ retry:
WARN_ON(set->fb);
WARN_ON(set->num_connectors);
- crtc_state->enable = false;
+ ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
+ if (ret != 0)
+ goto fail;
+
crtc_state->active = false;
ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
@@ -1622,9 +1625,11 @@ retry:
WARN_ON(!set->fb);
WARN_ON(!set->num_connectors);
- crtc_state->enable = true;
+ ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
+ if (ret != 0)
+ goto fail;
+
crtc_state->active = true;
- drm_mode_copy(&crtc_state->mode, set->mode);
ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
if (ret != 0)
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 9297a61..393114d 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -937,10 +937,11 @@ int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mod
crtc_state->crtc = crtc;
}
- crtc_state->enable = true;
crtc_state->planes_changed = true;
crtc_state->mode_changed = true;
- drm_mode_copy(&crtc_state->mode, mode);
+ ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
+ if (ret)
+ goto out;
drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode);
if (crtc_funcs->atomic_check) {
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index e89db0c..1e8c61f 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -110,6 +110,9 @@ drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
}
int __must_check
+drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
+ struct drm_display_mode *mode);
+int __must_check
drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
struct drm_crtc *crtc);
void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
--
2.4.1
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