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gallium: add PIPE_CAP_PREFER_BACK_BUFFER_REUSE

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This will be used in the next commit.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Michel Dänzer <mdaenzer@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12788>
This commit is contained in:
Pierre-Eric Pelloux-Prayer
2021-09-14 10:57:39 +02:00
committed by Marge Bot
parent d89ba3f2a9
commit e67083caf4
10 changed files with 25 additions and 0 deletions
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1
docs/gallium/screen.rst
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@@ -621,6 +621,7 @@ The integer capabilities:
* ``PIPE_CAP_EMULATE_NONFIXED_PRIMITIVE_RESTART``: Driver requests all draws using a non-fixed restart index to be rewritten to use a fixed restart index.
* ``PIPE_CAP_SUPPORTED_PRIM_MODES``: A bitmask of the ``pipe_prim_type`` enum values that the driver can natively support.
* ``PIPE_CAP_SUPPORTED_PRIM_MODES_WITH_RESTART``: A bitmask of the ``pipe_prim_type`` enum values that the driver can natively support for primitive restart. Only useful if ``PIPE_CAP_PRIMITIVE_RESTART`` is also exported.
* ``PIPE_CAP_PREFER_BACK_BUFFER_REUSE``: Only applies to DRI_PRIME. If 1, the driver prefers that DRI3 tries to use the same back buffer each frame. If 0, this means DRI3 will at least use 2 back buffers and ping-pong between them to allow the tiled->linear copy to run in parallel.
.. _pipe_capf:

1
include/GL/internal/dri_interface.h
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@@ -1991,6 +1991,7 @@ typedef struct __DRIDriverVtableExtensionRec {
#define __DRI2_RENDERER_HAS_CONTEXT_PRIORITY_HIGH (1 << 2)
#define __DRI2_RENDERER_HAS_PROTECTED_CONTENT 0x000e
#define __DRI2_RENDERER_PREFER_BACK_BUFFER_REUSE 0x000f
typedef struct __DRI2rendererQueryExtensionRec __DRI2rendererQueryExtension;
struct __DRI2rendererQueryExtensionRec {

1
src/egl/drivers/dri2/platform_x11_dri3.c
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@@ -175,6 +175,7 @@ dri3_create_surface(_EGLDisplay *disp, EGLint type, _EGLConfig *conf,
dri2_dpy->dri_screen,
dri2_dpy->is_different_gpu,
dri2_dpy->multibuffers_available,
true,
dri_config,
&dri2_dpy->loader_dri3_ext,
&egl_dri3_vtable,

1
src/gallium/auxiliary/util/u_screen.c
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@@ -291,6 +291,7 @@ u_pipe_screen_get_param_defaults(struct pipe_screen *pscreen,
return 4; /* GLES 2.0 minimum value */
case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
case PIPE_CAP_PREFER_BACK_BUFFER_REUSE:
return 1;
case PIPE_CAP_GLSL_TESS_LEVELS_AS_INPUTS:

5
src/gallium/frontends/dri/dri_query_renderer.c
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@@ -74,6 +74,11 @@ dri2_query_renderer_integer(__DRIscreen *_screen, int param,
if (!value[0])
return -1;
return 0;
case __DRI2_RENDERER_PREFER_BACK_BUFFER_REUSE:
value[0] =
screen->base.screen->get_param(screen->base.screen,
PIPE_CAP_PREFER_BACK_BUFFER_REUSE);
return 0;
default:
return driQueryRendererIntegerCommon(_screen, param, value);
}

1
src/gallium/include/pipe/p_defines.h
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@@ -993,6 +993,7 @@ enum pipe_cap
PIPE_CAP_EMULATE_NONFIXED_PRIMITIVE_RESTART,
PIPE_CAP_SUPPORTED_PRIM_MODES,
PIPE_CAP_SUPPORTED_PRIM_MODES_WITH_RESTART,
PIPE_CAP_PREFER_BACK_BUFFER_REUSE,
PIPE_CAP_LAST,
/* XXX do not add caps after PIPE_CAP_LAST! */

10
src/glx/dri3_glx.c
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@@ -375,6 +375,7 @@ dri3_create_drawable(struct glx_screen *base, XID xDrawable,
if (loader_dri3_drawable_init(XGetXCBConnection(base->dpy),
xDrawable, psc->driScreen,
psc->is_different_gpu, has_multibuffer,
psc->prefer_back_buffer_reuse,
config->driConfig,
&psc->loader_dri3_ext, &glx_dri3_vtable,
&pdraw->loader_drawable)) {
@@ -1022,6 +1023,15 @@ dri3_create_screen(int screen, struct glx_display * priv)
InfoMessageF("Using DRI3 for screen %d\n", screen);
psc->prefer_back_buffer_reuse = 1;
if (psc->is_different_gpu && psc->rendererQuery) {
unsigned value;
if (psc->rendererQuery->queryInteger(psc->driScreen,
__DRI2_RENDERER_PREFER_BACK_BUFFER_REUSE,
&value) == 0)
psc->prefer_back_buffer_reuse = value;
}
return &psc->base;
handle_error:

1
src/glx/dri3_priv.h
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@@ -108,6 +108,7 @@ struct dri3_screen {
void *driver;
int fd;
bool is_different_gpu;
bool prefer_back_buffer_reuse;
/* fd for display GPU in case of prime */
int fd_display_gpu;

2
src/loader/loader_dri3_helper.c
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@@ -373,6 +373,7 @@ loader_dri3_drawable_init(xcb_connection_t *conn,
__DRIscreen *dri_screen,
bool is_different_gpu,
bool multiplanes_available,
bool prefer_back_buffer_reuse,
const __DRIconfig *dri_config,
struct loader_dri3_extensions *ext,
const struct loader_dri3_vtable *vtable,
@@ -392,6 +393,7 @@ loader_dri3_drawable_init(xcb_connection_t *conn,
draw->dri_screen = dri_screen;
draw->is_different_gpu = is_different_gpu;
draw->multiplanes_available = multiplanes_available;
draw->prefer_back_buffer_reuse = prefer_back_buffer_reuse;
draw->have_back = 0;
draw->have_fake_front = 0;

2
src/loader/loader_dri3_helper.h
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@@ -134,6 +134,7 @@ struct loader_dri3_drawable {
__DRIscreen *dri_screen;
bool is_different_gpu;
bool multiplanes_available;
bool prefer_back_buffer_reuse;
/* DRI screen created for display GPU in case of prime */
__DRIscreen *dri_screen_display_gpu;
@@ -204,6 +205,7 @@ loader_dri3_drawable_init(xcb_connection_t *conn,
__DRIscreen *dri_screen,
bool is_different_gpu,
bool is_multiplanes_available,
bool prefer_back_buffer_reuse,
const __DRIconfig *dri_config,
struct loader_dri3_extensions *ext,
const struct loader_dri3_vtable *vtable,