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5429302e78
In commit "libweston: add initial dma-buf feedback implementation" we've added initial support to dma-buf feedback, but it was not using the feedback from DRM-backend to add useful per-surface feedback. In this patch we add this. The scanout tranche of the per-surface feedback is based on the union of formats/modifiers of the primary and overlay planes available. These are intersected with the formats/modifiers supported by the renderer device. Also, it's important to mention that the scene can change a lot and we can't predict much. So this patch also adds hysteresis to the dma-buf feedback. We wait a few seconds to be sure that we reached stability before adding or removing the scanout tranche from dma-buf feedback and resending them. This help us to avoid spamming clients and leading to unnecessary buffer reallocations on their end. Here's an example of what we want to avoid: 1. We detect that a view was not placed in a plane only because its format is not supported by the plane, so we add the scanout tranche to the feedback and send the events. 2. A few milliseconds after, the view gets occluded. So now the view can't be placed in a plane anymore. We need to remove the scanout tranche and resend the feedback with formats/modifiers optimal for the renderer device. The client will then reallocate its buffers. 3. A few milliseconds after, the view that was causing the occlusion gets minimized. So we got back to the first situation, in which the format of the view is not compatible with the plane. Then we need to add a scanout tranche and resend the feedback... This patch is based on previous work of Scott Anderson (@ascent). Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com> Signed-off-by: Scott Anderson <scott.anderson@collabora.com> Reviewed-by: Daniel Stone <daniels@collabora.com> |
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| .. | ||
| drm-gbm.c | ||
| drm-internal.h | ||
| drm-virtual.c | ||
| drm.c | ||
| fb.c | ||
| kms.c | ||
| libbacklight.c | ||
| libbacklight.h | ||
| meson.build | ||
| modes.c | ||
| state-helpers.c | ||
| state-propose.c | ||
| vaapi-recorder.c | ||
| vaapi-recorder.h | ||