Hi Maarten,
One more thing.
On Monday 16 Jan 2017 10:37:43 Maarten Lankhorst wrote:
This is a straightforward conversion that converts all the users of get_existing_state in atomic core to use get_old_state or get_new_state
Changes since v1:
- Fix using the wrong state in
drm_atomic_helper_update_legacy_modeset_state.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com
drivers/gpu/drm/drm_atomic.c | 6 +++--- drivers/gpu/drm/drm_atomic_helper.c | 39 ++++++++++++++-------------------- drivers/gpu/drm/drm_blend.c | 3 +-- 3 files changed, 22 insertions(+), 26 deletions(-)
[snip]
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index b26cf786ce12..1de8d5fbc8d3 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c
[snip]
@@ -698,8 +695,7 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) if (!old_conn_state->crtc) continue;
old_crtc_state = drm_atomic_get_existing_crtc_state(old_state,
old_conn_state->crtc);
old_crtc_state = drm_atomic_get_new_crtc_state(old_state,old_conn_state->crtc);
This looks wrong. I believe you should call drm_atomic_get_old_crtc_state() here. If I'm not mistaken drm_atomic_get_existing_crtc_state() did the right thing as old_state->crtcs[*].state was set to the old state by the state swap operation.
On the other hand, drm_atomic_helper_update_legacy_modeset_state() uses drm_atomic_get_new_plane_state() the same way you do here, even though it operates after state swap, and your changelog specifically mentions that you've fixed that in v2. It's getting too late to properly wrap my head around this, I'll let you check which option is correct (but I reserve the right to challenge it if your explanation isn't convincing enough ;-)).
if (!old_crtc_state->active || !drm_atomic_crtc_needs_modeset(old_conn_state->crtc-state))