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wayland: Use new KMS update test API to try acquiring scanout

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This significantly increases the chance of a fullscreen surface buffer
being scanned out instead of being painted via composition. This is
assuming the client supports the DMA buffer feedback Wayland protocol.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2146>
This commit is contained in:
Jonas Ådahl 2021-12-08 21:23:54 +01:00 committed by Marge Bot
parent a14923e993
commit 8a2fcf3be0
4 changed files with 38 additions and 72 deletions
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54
src/backends/native/meta-onscreen-native.c
View File

@ -1226,46 +1226,30 @@ meta_onscreen_native_swap_buffers_with_damage (CoglOnscreen *onscreen,
}
gboolean
meta_onscreen_native_is_buffer_scanout_compatible (CoglOnscreen *onscreen,
uint32_t drm_format,
uint64_t drm_modifier,
uint32_t stride)
meta_onscreen_native_is_buffer_scanout_compatible (CoglOnscreen *onscreen,
MetaDrmBuffer *fb)
{
MetaOnscreenNative *onscreen_native = META_ONSCREEN_NATIVE (onscreen);
const MetaCrtcConfig *crtc_config;
MetaDrmBuffer *fb;
struct gbm_bo *gbm_bo;
MetaCrtc *crtc = onscreen_native->crtc;
MetaCrtcKms *crtc_kms = META_CRTC_KMS (crtc);
MetaGpuKms *gpu_kms;
MetaKmsDevice *kms_device;
MetaKms *kms;
MetaKmsUpdate *test_update;
g_autoptr (MetaKmsFeedback) kms_feedback = NULL;
MetaKmsFeedbackResult result;
crtc_config = meta_crtc_get_config (onscreen_native->crtc);
if (crtc_config->transform != META_MONITOR_TRANSFORM_NORMAL)
return FALSE;
gpu_kms = META_GPU_KMS (meta_crtc_get_gpu (crtc));
kms_device = meta_gpu_kms_get_kms_device (gpu_kms);
kms = meta_kms_device_get_kms (kms_device);
test_update = meta_kms_update_new (kms_device);
if (onscreen_native->secondary_gpu_state)
return FALSE;
meta_crtc_kms_assign_primary_plane (crtc_kms, fb, test_update);
kms_feedback = meta_kms_post_test_update_sync (kms, test_update);
meta_kms_update_free (test_update);
if (!onscreen_native->gbm.surface)
return FALSE;
fb = onscreen_native->gbm.current_fb ? onscreen_native->gbm.current_fb
: onscreen_native->gbm.next_fb;
if (!fb)
return FALSE;
if (!META_IS_DRM_BUFFER_GBM (fb))
return FALSE;
gbm_bo = meta_drm_buffer_gbm_get_bo (META_DRM_BUFFER_GBM (fb));
if (gbm_bo_get_format (gbm_bo) != drm_format)
return FALSE;
if (gbm_bo_get_modifier (gbm_bo) != drm_modifier)
return FALSE;
if (gbm_bo_get_stride (gbm_bo) != stride)
return FALSE;
return TRUE;
result = meta_kms_feedback_get_result (kms_feedback);
return result == META_KMS_FEEDBACK_PASSED;
}
static gboolean

6
src/backends/native/meta-onscreen-native.h
View File

@ -40,10 +40,8 @@ void meta_onscreen_native_finish_frame (CoglOnscreen *onscreen,
void meta_onscreen_native_dummy_power_save_page_flip (CoglOnscreen *onscreen);
gboolean meta_onscreen_native_is_buffer_scanout_compatible (CoglOnscreen *onscreen,
uint32_t drm_format,
uint64_t drm_modifier,
uint32_t stride);
gboolean meta_onscreen_native_is_buffer_scanout_compatible (CoglOnscreen *onscreen,
MetaDrmBuffer *fb);
void meta_onscreen_native_set_view (CoglOnscreen *onscreen,
MetaRendererView *view);

28
src/wayland/meta-wayland-buffer.c
View File

@ -691,11 +691,8 @@ try_acquire_egl_image_scanout (MetaWaylandBuffer *buffer,
MetaDeviceFile *device_file;
struct gbm_device *gbm_device;
struct gbm_bo *gbm_bo;
uint32_t drm_format;
uint64_t drm_modifier;
uint32_t stride;
MetaDrmBufferFlags flags;
MetaDrmBufferGbm *fb;
g_autoptr (MetaDrmBufferGbm) fb = NULL;
g_autoptr (GError) error = NULL;
gpu_kms = meta_renderer_native_get_primary_gpu (renderer_native);
@ -708,20 +705,8 @@ try_acquire_egl_image_scanout (MetaWaylandBuffer *buffer,
if (!gbm_bo)
return NULL;
drm_format = gbm_bo_get_format (gbm_bo);
drm_modifier = gbm_bo_get_modifier (gbm_bo);
stride = gbm_bo_get_stride (gbm_bo);
if (!meta_onscreen_native_is_buffer_scanout_compatible (onscreen,
drm_format,
drm_modifier,
stride))
{
gbm_bo_destroy (gbm_bo);
return NULL;
}
flags = META_DRM_BUFFER_FLAG_NONE;
if (drm_modifier == DRM_FORMAT_MOD_INVALID)
if (gbm_bo_get_modifier (gbm_bo) == DRM_FORMAT_MOD_INVALID)
flags |= META_DRM_BUFFER_FLAG_DISABLE_MODIFIERS;
fb = meta_drm_buffer_gbm_new_take (device_file, gbm_bo, flags, &error);
@ -732,7 +717,11 @@ try_acquire_egl_image_scanout (MetaWaylandBuffer *buffer,
return NULL;
}
return COGL_SCANOUT (fb);
if (!meta_onscreen_native_is_buffer_scanout_compatible (onscreen,
META_DRM_BUFFER (fb)))
return NULL;
return COGL_SCANOUT (g_steal_pointer (&fb));
#else
return NULL;
#endif
@ -742,6 +731,9 @@ CoglScanout *
meta_wayland_buffer_try_acquire_scanout (MetaWaylandBuffer *buffer,
CoglOnscreen *onscreen)
{
COGL_TRACE_BEGIN_SCOPED (MetaWaylandBufferTryScanout,
"WaylandBuffer (try scanout)");
switch (buffer->type)
{
case META_WAYLAND_BUFFER_TYPE_SHM:

22
src/wayland/meta-wayland-dma-buf.c
View File

@ -528,17 +528,14 @@ meta_wayland_dma_buf_try_acquire_scanout (MetaWaylandDmaBufBuffer *dma_buf,
MetaBackend *backend = meta_get_backend ();
MetaRenderer *renderer = meta_backend_get_renderer (backend);
MetaRendererNative *renderer_native = META_RENDERER_NATIVE (renderer);
int n_planes;
MetaDeviceFile *device_file;
MetaGpuKms *gpu_kms;
int n_planes;
uint32_t drm_format;
uint64_t drm_modifier;
uint32_t stride;
struct gbm_bo *gbm_bo;
gboolean use_modifier;
g_autoptr (GError) error = NULL;
MetaDrmBufferFlags flags;
MetaDrmBufferGbm *fb;
g_autoptr (MetaDrmBufferGbm) fb = NULL;
for (n_planes = 0; n_planes < META_WAYLAND_DMA_BUF_MAX_FDS; n_planes++)
{
@ -546,15 +543,6 @@ meta_wayland_dma_buf_try_acquire_scanout (MetaWaylandDmaBufBuffer *dma_buf,
break;
}
drm_format = dma_buf->drm_format;
drm_modifier = dma_buf->drm_modifier;
stride = dma_buf->strides[0];
if (!meta_onscreen_native_is_buffer_scanout_compatible (onscreen,
drm_format,
drm_modifier,
stride))
return NULL;
device_file = meta_renderer_native_get_primary_device_file (renderer_native);
gpu_kms = meta_renderer_native_get_primary_gpu (renderer_native);
gbm_bo = import_scanout_gbm_bo (dma_buf, gpu_kms, n_planes, &use_modifier);
@ -576,7 +564,11 @@ meta_wayland_dma_buf_try_acquire_scanout (MetaWaylandDmaBufBuffer *dma_buf,
return NULL;
}
return COGL_SCANOUT (fb);
if (!meta_onscreen_native_is_buffer_scanout_compatible (onscreen,
META_DRM_BUFFER (fb)))
return NULL;
return COGL_SCANOUT (g_steal_pointer (&fb));
#else
return NULL;
#endif