Make GBM optional in case GL renderer is disabled. This allows to build Weston with DRM backend without Mesa dependencies. Signed-off-by: Stefan Agner <stefan@agner.ch>dev
Stefan Agner
5 years ago
parent
3654c673f8
commit
ccf24076dd
@ -0,0 +1,366 @@ |
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/*
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* Copyright © 2008-2011 Kristian Høgsberg |
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* Copyright © 2011 Intel Corporation |
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* Copyright © 2017, 2018 Collabora, Ltd. |
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* Copyright © 2017, 2018 General Electric Company |
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* Copyright (c) 2018 DisplayLink (UK) Ltd. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining |
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* a copy of this software and associated documentation files (the |
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* "Software"), to deal in the Software without restriction, including |
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* without limitation the rights to use, copy, modify, merge, publish, |
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* distribute, sublicense, and/or sell copies of the Software, and to |
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* permit persons to whom the Software is furnished to do so, subject to |
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* the following conditions: |
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* |
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* The above copyright notice and this permission notice (including the |
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* next paragraph) shall be included in all copies or substantial |
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* portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#include "config.h" |
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#include <errno.h> |
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#include <stdint.h> |
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#include <stdlib.h> |
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#include <ctype.h> |
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#include <string.h> |
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#include <dlfcn.h> |
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#include "drm-internal.h" |
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#include "pixman-renderer.h" |
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#include "pixel-formats.h" |
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#include "renderer-gl/gl-renderer.h" |
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#include "shared/weston-egl-ext.h" |
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#include "linux-dmabuf.h" |
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#include "linux-explicit-synchronization.h" |
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struct gl_renderer_interface *gl_renderer; |
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static struct gbm_device * |
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create_gbm_device(int fd) |
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{ |
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struct gbm_device *gbm; |
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gl_renderer = weston_load_module("gl-renderer.so", |
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"gl_renderer_interface"); |
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if (!gl_renderer) |
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return NULL; |
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/* GBM will load a dri driver, but even though they need symbols from
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* libglapi, in some version of Mesa they are not linked to it. Since |
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* only the gl-renderer module links to it, the call above won't make |
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* these symbols globally available, and loading the DRI driver fails. |
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* Workaround this by dlopen()'ing libglapi with RTLD_GLOBAL. */ |
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dlopen("libglapi.so.0", RTLD_LAZY | RTLD_GLOBAL); |
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gbm = gbm_create_device(fd); |
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return gbm; |
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} |
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/* When initializing EGL, if the preferred buffer format isn't available
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* we may be able to substitute an ARGB format for an XRGB one. |
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* |
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* This returns 0 if substitution isn't possible, but 0 might be a |
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* legitimate format for other EGL platforms, so the caller is |
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* responsible for checking for 0 before calling gl_renderer->create(). |
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* |
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* This works around https://bugs.freedesktop.org/show_bug.cgi?id=89689
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* but it's entirely possible we'll see this again on other implementations. |
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*/ |
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static uint32_t |
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fallback_format_for(uint32_t format) |
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{ |
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const struct pixel_format_info *pf; |
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pf = pixel_format_get_info_by_opaque_substitute(format); |
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if (!pf) |
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return 0; |
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return pf->format; |
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} |
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static int |
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drm_backend_create_gl_renderer(struct drm_backend *b) |
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{ |
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uint32_t format[3] = { |
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b->gbm_format, |
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fallback_format_for(b->gbm_format), |
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0, |
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}; |
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unsigned n_formats = 2; |
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if (format[1]) |
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n_formats = 3; |
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if (gl_renderer->display_create(b->compositor, |
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EGL_PLATFORM_GBM_KHR, |
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(void *)b->gbm, |
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EGL_WINDOW_BIT, |
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format, |
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n_formats) < 0) { |
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return -1; |
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} |
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return 0; |
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} |
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int |
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init_egl(struct drm_backend *b) |
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{ |
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b->gbm = create_gbm_device(b->drm.fd); |
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if (!b->gbm) |
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return -1; |
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if (drm_backend_create_gl_renderer(b) < 0) { |
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gbm_device_destroy(b->gbm); |
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return -1; |
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} |
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return 0; |
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} |
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static void drm_output_fini_cursor_egl(struct drm_output *output) |
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{ |
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unsigned int i; |
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for (i = 0; i < ARRAY_LENGTH(output->gbm_cursor_fb); i++) { |
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drm_fb_unref(output->gbm_cursor_fb[i]); |
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output->gbm_cursor_fb[i] = NULL; |
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} |
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} |
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static int |
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drm_output_init_cursor_egl(struct drm_output *output, struct drm_backend *b) |
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{ |
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unsigned int i; |
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/* No point creating cursors if we don't have a plane for them. */ |
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if (!output->cursor_plane) |
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return 0; |
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for (i = 0; i < ARRAY_LENGTH(output->gbm_cursor_fb); i++) { |
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struct gbm_bo *bo; |
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bo = gbm_bo_create(b->gbm, b->cursor_width, b->cursor_height, |
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GBM_FORMAT_ARGB8888, |
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GBM_BO_USE_CURSOR | GBM_BO_USE_WRITE); |
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if (!bo) |
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goto err; |
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output->gbm_cursor_fb[i] = |
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drm_fb_get_from_bo(bo, b, false, BUFFER_CURSOR); |
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if (!output->gbm_cursor_fb[i]) { |
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gbm_bo_destroy(bo); |
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goto err; |
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} |
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output->gbm_cursor_handle[i] = gbm_bo_get_handle(bo).s32; |
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} |
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return 0; |
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err: |
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weston_log("cursor buffers unavailable, using gl cursors\n"); |
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b->cursors_are_broken = 1; |
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drm_output_fini_cursor_egl(output); |
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return -1; |
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} |
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/* Init output state that depends on gl or gbm */ |
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int |
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drm_output_init_egl(struct drm_output *output, struct drm_backend *b) |
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{ |
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uint32_t format[2] = { |
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output->gbm_format, |
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fallback_format_for(output->gbm_format), |
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}; |
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unsigned n_formats = 1; |
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struct weston_mode *mode = output->base.current_mode; |
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struct drm_plane *plane = output->scanout_plane; |
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unsigned int i; |
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assert(output->gbm_surface == NULL); |
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for (i = 0; i < plane->count_formats; i++) { |
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if (plane->formats[i].format == output->gbm_format) |
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break; |
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} |
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if (i == plane->count_formats) { |
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weston_log("format 0x%x not supported by output %s\n", |
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output->gbm_format, output->base.name); |
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return -1; |
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} |
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#ifdef HAVE_GBM_MODIFIERS |
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if (plane->formats[i].count_modifiers > 0) { |
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output->gbm_surface = |
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gbm_surface_create_with_modifiers(b->gbm, |
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mode->width, |
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mode->height, |
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output->gbm_format, |
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plane->formats[i].modifiers, |
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plane->formats[i].count_modifiers); |
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} |
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/* If allocating with modifiers fails, try again without. This can
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* happen when the KMS display device supports modifiers but the |
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* GBM driver does not, e.g. the old i915 Mesa driver. */ |
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if (!output->gbm_surface) |
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#endif |
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{ |
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output->gbm_surface = |
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gbm_surface_create(b->gbm, mode->width, mode->height, |
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output->gbm_format, |
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output->gbm_bo_flags); |
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} |
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if (!output->gbm_surface) { |
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weston_log("failed to create gbm surface\n"); |
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return -1; |
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} |
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if (format[1]) |
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n_formats = 2; |
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if (gl_renderer->output_window_create(&output->base, |
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(EGLNativeWindowType)output->gbm_surface, |
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output->gbm_surface, |
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format, |
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n_formats) < 0) { |
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weston_log("failed to create gl renderer output state\n"); |
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gbm_surface_destroy(output->gbm_surface); |
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output->gbm_surface = NULL; |
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return -1; |
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} |
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drm_output_init_cursor_egl(output, b); |
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return 0; |
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} |
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void |
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drm_output_fini_egl(struct drm_output *output) |
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{ |
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struct drm_backend *b = to_drm_backend(output->base.compositor); |
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/* Destroying the GBM surface will destroy all our GBM buffers,
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* regardless of refcount. Ensure we destroy them here. */ |
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if (!b->shutting_down && |
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output->scanout_plane->state_cur->fb && |
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output->scanout_plane->state_cur->fb->type == BUFFER_GBM_SURFACE) { |
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drm_plane_state_free(output->scanout_plane->state_cur, true); |
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output->scanout_plane->state_cur = |
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drm_plane_state_alloc(NULL, output->scanout_plane); |
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output->scanout_plane->state_cur->complete = true; |
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} |
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gl_renderer->output_destroy(&output->base); |
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gbm_surface_destroy(output->gbm_surface); |
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output->gbm_surface = NULL; |
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drm_output_fini_cursor_egl(output); |
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} |
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struct drm_fb * |
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drm_output_render_gl(struct drm_output_state *state, pixman_region32_t *damage) |
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{ |
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struct drm_output *output = state->output; |
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struct drm_backend *b = to_drm_backend(output->base.compositor); |
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struct gbm_bo *bo; |
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struct drm_fb *ret; |
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output->base.compositor->renderer->repaint_output(&output->base, |
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damage); |
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bo = gbm_surface_lock_front_buffer(output->gbm_surface); |
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if (!bo) { |
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weston_log("failed to lock front buffer: %s\n", |
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strerror(errno)); |
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return NULL; |
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} |
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/* The renderer always produces an opaque image. */ |
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ret = drm_fb_get_from_bo(bo, b, true, BUFFER_GBM_SURFACE); |
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if (!ret) { |
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weston_log("failed to get drm_fb for bo\n"); |
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gbm_surface_release_buffer(output->gbm_surface, bo); |
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return NULL; |
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} |
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ret->gbm_surface = output->gbm_surface; |
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return ret; |
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} |
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static void |
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switch_to_gl_renderer(struct drm_backend *b) |
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{ |
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struct drm_output *output; |
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bool dmabuf_support_inited; |
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bool linux_explicit_sync_inited; |
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if (!b->use_pixman) |
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return; |
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dmabuf_support_inited = !!b->compositor->renderer->import_dmabuf; |
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linux_explicit_sync_inited = |
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b->compositor->capabilities & WESTON_CAP_EXPLICIT_SYNC; |
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weston_log("Switching to GL renderer\n"); |
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b->gbm = create_gbm_device(b->drm.fd); |
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if (!b->gbm) { |
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weston_log("Failed to create gbm device. " |
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"Aborting renderer switch\n"); |
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return; |
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} |
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wl_list_for_each(output, &b->compositor->output_list, base.link) |
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pixman_renderer_output_destroy(&output->base); |
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b->compositor->renderer->destroy(b->compositor); |
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if (drm_backend_create_gl_renderer(b) < 0) { |
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gbm_device_destroy(b->gbm); |
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weston_log("Failed to create GL renderer. Quitting.\n"); |
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/* FIXME: we need a function to shutdown cleanly */ |
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assert(0); |
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} |
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wl_list_for_each(output, &b->compositor->output_list, base.link) |
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drm_output_init_egl(output, b); |
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b->use_pixman = 0; |
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if (!dmabuf_support_inited && b->compositor->renderer->import_dmabuf) { |
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if (linux_dmabuf_setup(b->compositor) < 0) |
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weston_log("Error: initializing dmabuf " |
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"support failed.\n"); |
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} |
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if (!linux_explicit_sync_inited && |
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(b->compositor->capabilities & WESTON_CAP_EXPLICIT_SYNC)) { |
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if (linux_explicit_synchronization_setup(b->compositor) < 0) |
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weston_log("Error: initializing explicit " |
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" synchronization support failed.\n"); |
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} |
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} |
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void |
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renderer_switch_binding(struct weston_keyboard *keyboard, |
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const struct timespec *time, uint32_t key, void *data) |
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{ |
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struct drm_backend *b = |
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to_drm_backend(keyboard->seat->compositor); |
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switch_to_gl_renderer(b); |
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} |
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