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renderer/native: Use primary GPU to copy

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When the preferred path META_SHARED_FRAMEBUFFER_COPY_MODE_SECONDARY_GPU cannot
be used, as is the case for e.g. DisplayLink devices which do not actually have
a GPU, try to use the primary GPU for the copying before falling back to
read-pixels which is a CPU copy.

When the primary GPU copy works, it should be a significant performance win
over the CPU copy by avoiding stalling libmutter for the duration.

This also renames META_SHARED_FRAMEBUFFER_COPY_MODE_* because the new names are
more accurate. While the secondary GPU copy is always a GPU copy, the primary
copy might be either a CPU or a GPU copy.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/615
This commit is contained in:
Pekka Paalanen 2018-11-29 13:34:40 +02:00 committed by Jonas Ådahl
parent 2c893beff1
commit 3794df608c
1 changed files with 154 additions and 18 deletions
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172
src/backends/native/meta-renderer-native.c
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@ -3,7 +3,7 @@
/*
* Copyright (C) 2011 Intel Corporation.
* Copyright (C) 2016 Red Hat
* Copyright (c) 2018 DisplayLink (UK) Ltd.
* Copyright (c) 2018,2019 DisplayLink (UK) Ltd.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
@ -69,6 +69,7 @@
#include "backends/native/meta-renderer-native-gles3.h"
#include "backends/native/meta-renderer-native.h"
#include "cogl/cogl.h"
#include "cogl/cogl-framebuffer.h"
#include "core/boxes-private.h"
#ifndef EGL_DRM_MASTER_FD_EXT
@ -93,8 +94,14 @@ static GParamSpec *obj_props[PROP_LAST];
typedef enum _MetaSharedFramebufferCopyMode
{
META_SHARED_FRAMEBUFFER_COPY_MODE_GPU,
META_SHARED_FRAMEBUFFER_COPY_MODE_CPU
/* the secondary GPU will make the copy */
META_SHARED_FRAMEBUFFER_COPY_MODE_SECONDARY_GPU,
/*
* The copy is made in the primary GPU rendering context, either
* as a CPU copy through Cogl read-pixels or as primary GPU copy
* using glBlitFramebuffer.
*/
META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY
} MetaSharedFramebufferCopyMode;
typedef struct _MetaRendererNativeGpuData
@ -121,6 +128,7 @@ typedef struct _MetaRendererNativeGpuData
struct {
MetaSharedFramebufferCopyMode copy_mode;
gboolean is_hardware_rendering;
gboolean has_EGL_EXT_image_dma_buf_import_modifiers;
/* For GPU blit mode */
EGLContext egl_context;
@ -875,7 +883,7 @@ init_secondary_gpu_state (MetaRendererNative *renderer_native,
switch (renderer_gpu_data->secondary.copy_mode)
{
case META_SHARED_FRAMEBUFFER_COPY_MODE_GPU:
case META_SHARED_FRAMEBUFFER_COPY_MODE_SECONDARY_GPU:
if (!init_secondary_gpu_state_gpu_copy_mode (renderer_native,
onscreen,
renderer_gpu_data,
@ -883,7 +891,7 @@ init_secondary_gpu_state (MetaRendererNative *renderer_native,
error))
return FALSE;
break;
case META_SHARED_FRAMEBUFFER_COPY_MODE_CPU:
case META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY:
if (!init_secondary_gpu_state_cpu_copy_mode (renderer_native,
onscreen,
renderer_gpu_data,
@ -967,10 +975,10 @@ free_current_secondary_bo (MetaGpuKms *gpu_kms,
renderer_gpu_data = secondary_gpu_state->renderer_gpu_data;
switch (renderer_gpu_data->secondary.copy_mode)
{
case META_SHARED_FRAMEBUFFER_COPY_MODE_GPU:
case META_SHARED_FRAMEBUFFER_COPY_MODE_SECONDARY_GPU:
g_clear_object (&secondary_gpu_state->gbm.current_fb);
break;
case META_SHARED_FRAMEBUFFER_COPY_MODE_CPU:
case META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY:
break;
}
}
@ -1458,10 +1466,10 @@ free_next_secondary_bo (MetaGpuKms *gpu_kms,
renderer_gpu_data = secondary_gpu_state->renderer_gpu_data;
switch (renderer_gpu_data->secondary.copy_mode)
{
case META_SHARED_FRAMEBUFFER_COPY_MODE_GPU:
case META_SHARED_FRAMEBUFFER_COPY_MODE_SECONDARY_GPU:
g_clear_object (&secondary_gpu_state->gbm.next_fb);
break;
case META_SHARED_FRAMEBUFFER_COPY_MODE_CPU:
case META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY:
break;
}
}
@ -1831,6 +1839,125 @@ secondary_gpu_get_next_dumb_buffer (MetaOnscreenNativeSecondaryGpuState *seconda
return &secondary_gpu_state->cpu.dumb_fbs[0];
}
static gboolean
copy_shared_framebuffer_primary_gpu (CoglOnscreen *onscreen,
MetaOnscreenNativeSecondaryGpuState *secondary_gpu_state)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
CoglContext *cogl_context = framebuffer->context;
CoglOnscreenEGL *onscreen_egl = onscreen->winsys;
MetaOnscreenNative *onscreen_native = onscreen_egl->platform;
CoglDisplay *cogl_display = cogl_context->display;
CoglRenderer *cogl_renderer = cogl_display->renderer;
CoglRendererEGL *cogl_renderer_egl = cogl_renderer->winsys;
EGLDisplay egl_display = cogl_renderer_egl->edpy;
MetaRendererNative *renderer_native = onscreen_native->renderer_native;
MetaEgl *egl = meta_renderer_native_get_egl (renderer_native);
MetaRendererNativeGpuData *primary_gpu_data;
MetaDrmBufferDumb *buffer_dumb;
MetaDumbBuffer *dumb_fb;
int dmabuf_fd;
EGLImageKHR egl_image;
g_autoptr (GError) error = NULL;
uint32_t strides[1];
uint32_t offsets[1];
uint64_t modifiers[1];
CoglPixelFormat cogl_format;
CoglTexture2D *cogl_tex;
CoglOffscreen *cogl_fbo;
int ret;
primary_gpu_data = meta_renderer_native_get_gpu_data (renderer_native,
renderer_native->primary_gpu_kms);
if (!primary_gpu_data->secondary.has_EGL_EXT_image_dma_buf_import_modifiers)
return FALSE;
dumb_fb = secondary_gpu_get_next_dumb_buffer (secondary_gpu_state);
g_assert (cogl_framebuffer_get_width (framebuffer) == dumb_fb->width);
g_assert (cogl_framebuffer_get_height (framebuffer) == dumb_fb->height);
ret = cogl_pixel_format_from_drm_format (dumb_fb->drm_format,
&cogl_format,
NULL);
g_assert (ret);
dmabuf_fd = meta_dumb_buffer_ensure_dmabuf_fd (dumb_fb,
secondary_gpu_state->gpu_kms);
if (dmabuf_fd == -1)
return FALSE;
strides[0] = dumb_fb->stride_bytes;
offsets[0] = 0;
modifiers[0] = DRM_FORMAT_MOD_LINEAR;
egl_image = meta_egl_create_dmabuf_image (egl,
egl_display,
dumb_fb->width,
dumb_fb->height,
dumb_fb->drm_format,
1 /* n_planes */,
&dmabuf_fd,
strides,
offsets,
modifiers,
&error);
if (egl_image == EGL_NO_IMAGE_KHR)
{
g_debug ("%s: Failed to import dumb buffer to EGL: %s",
__func__, error->message);
return FALSE;
}
cogl_tex = cogl_egl_texture_2d_new_from_image (cogl_context,
dumb_fb->width,
dumb_fb->height,
cogl_format,
egl_image,
&error);
meta_egl_destroy_image (egl, egl_display, egl_image, NULL);
if (!cogl_tex)
{
g_debug ("%s: Failed to make Cogl texture: %s",
__func__, error->message);
return FALSE;
}
cogl_fbo = cogl_offscreen_new_with_texture (COGL_TEXTURE (cogl_tex));
cogl_object_unref (cogl_tex);
if (!cogl_framebuffer_allocate (COGL_FRAMEBUFFER (cogl_fbo), &error))
{
g_debug ("%s: Failed Cogl FBO alloc: %s",
__func__, error->message);
cogl_object_unref (cogl_fbo);
return FALSE;
}
if (!cogl_blit_framebuffer (framebuffer, COGL_FRAMEBUFFER (cogl_fbo),
0, 0, 0, 0,
dumb_fb->width, dumb_fb->height, &error))
{
g_debug ("%s: Failed Cogl blit: %s", __func__, error->message);
cogl_object_unref (cogl_fbo);
return FALSE;
}
cogl_object_unref (cogl_fbo);
g_clear_object (&secondary_gpu_state->gbm.next_fb);
buffer_dumb = meta_drm_buffer_dumb_new (dumb_fb->fb_id);
secondary_gpu_state->gbm.next_fb = META_DRM_BUFFER (buffer_dumb);
secondary_gpu_state->cpu.dumb_fb = dumb_fb;
return TRUE;
}
typedef struct _PixelFormatMap {
uint32_t drm_format;
CoglPixelFormat cogl_format;
@ -1953,13 +2080,17 @@ update_secondary_gpu_state_pre_swap_buffers (CoglOnscreen *onscreen)
renderer_gpu_data = secondary_gpu_state->renderer_gpu_data;
switch (renderer_gpu_data->secondary.copy_mode)
{
case META_SHARED_FRAMEBUFFER_COPY_MODE_GPU:
case META_SHARED_FRAMEBUFFER_COPY_MODE_SECONDARY_GPU:
/* Done after eglSwapBuffers. */
break;
case META_SHARED_FRAMEBUFFER_COPY_MODE_CPU:
copy_shared_framebuffer_cpu (onscreen,
secondary_gpu_state,
renderer_gpu_data);
case META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY:
if (!copy_shared_framebuffer_primary_gpu (onscreen,
secondary_gpu_state))
{
copy_shared_framebuffer_cpu (onscreen,
secondary_gpu_state,
renderer_gpu_data);
}
break;
}
}
@ -1987,13 +2118,13 @@ update_secondary_gpu_state_post_swap_buffers (CoglOnscreen *onscreen,
secondary_gpu_state->gpu_kms);
switch (renderer_gpu_data->secondary.copy_mode)
{
case META_SHARED_FRAMEBUFFER_COPY_MODE_GPU:
case META_SHARED_FRAMEBUFFER_COPY_MODE_SECONDARY_GPU:
copy_shared_framebuffer_gpu (onscreen,
secondary_gpu_state,
renderer_gpu_data,
egl_context_changed);
break;
case META_SHARED_FRAMEBUFFER_COPY_MODE_CPU:
case META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY:
/* Done before eglSwapBuffers. */
break;
}
@ -3396,7 +3527,12 @@ init_secondary_gpu_data_gpu (MetaRendererNativeGpuData *renderer_gpu_data,
renderer_gpu_data->secondary.is_hardware_rendering = TRUE;
renderer_gpu_data->secondary.egl_context = egl_context;
renderer_gpu_data->secondary.egl_config = egl_config;
renderer_gpu_data->secondary.copy_mode = META_SHARED_FRAMEBUFFER_COPY_MODE_GPU;
renderer_gpu_data->secondary.copy_mode = META_SHARED_FRAMEBUFFER_COPY_MODE_SECONDARY_GPU;
renderer_gpu_data->secondary.has_EGL_EXT_image_dma_buf_import_modifiers =
meta_egl_has_extensions (egl, egl_display, NULL,
"EGL_EXT_image_dma_buf_import_modifiers",
NULL);
return TRUE;
@ -3416,7 +3552,7 @@ static void
init_secondary_gpu_data_cpu (MetaRendererNativeGpuData *renderer_gpu_data)
{
renderer_gpu_data->secondary.is_hardware_rendering = FALSE;
renderer_gpu_data->secondary.copy_mode = META_SHARED_FRAMEBUFFER_COPY_MODE_CPU;
renderer_gpu_data->secondary.copy_mode = META_SHARED_FRAMEBUFFER_COPY_MODE_PRIMARY;
}
static void