62676d10b4
This patch changes the way the primary surface is used for dumb framebuffers. Instead of configuring the bo itself as primary surface a shadow bo is created and used instead. Framebuffers can share the shadow bo in case they have the same format and resolution. On atomic plane updates we don't have to update the primary surface in case we pageflip from one framebuffer to another framebuffer which shares the same shadow. This in turn avoids the flicker caused by the primary-destroy + primary-create cycle, which is very annonying when running wayland on qxl. The qxl driver never actually writes to the shadow bo. It sends qxl blit commands which update it though, and the spice server might actually execute them (and thereby write to the shadow) in case the local rendering is kicked for some reason. This happens for example in case qemu is asked to write out a dump of the guest display (screendump monitor command). Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Dave Airlie <airlied@redhat.com> Link: http://patchwork.freedesktop.org/patch/msgid/20171019062150.28090-3-kraxel@redhat.com
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/*
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* Copyright 2013 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Dave Airlie
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* Alon Levy
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*/
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#include "qxl_drv.h"
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#include "qxl_object.h"
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/* dumb ioctls implementation */
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int qxl_mode_dumb_create(struct drm_file *file_priv,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args)
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{
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struct qxl_device *qdev = dev->dev_private;
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struct qxl_bo *qobj;
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uint32_t handle;
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int r;
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struct qxl_surface surf;
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uint32_t pitch, format;
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pitch = args->width * ((args->bpp + 1) / 8);
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args->size = pitch * args->height;
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args->size = ALIGN(args->size, PAGE_SIZE);
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switch (args->bpp) {
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case 16:
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format = SPICE_SURFACE_FMT_16_565;
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break;
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case 32:
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format = SPICE_SURFACE_FMT_32_xRGB;
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break;
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default:
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return -EINVAL;
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}
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surf.width = args->width;
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surf.height = args->height;
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surf.stride = pitch;
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surf.format = format;
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r = qxl_gem_object_create_with_handle(qdev, file_priv,
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QXL_GEM_DOMAIN_VRAM,
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args->size, &surf, &qobj,
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&handle);
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if (r)
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return r;
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qobj->is_dumb = true;
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args->pitch = pitch;
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args->handle = handle;
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return 0;
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}
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int qxl_mode_dumb_mmap(struct drm_file *file_priv,
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struct drm_device *dev,
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uint32_t handle, uint64_t *offset_p)
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{
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struct drm_gem_object *gobj;
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struct qxl_bo *qobj;
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BUG_ON(!offset_p);
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gobj = drm_gem_object_lookup(file_priv, handle);
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if (gobj == NULL)
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return -ENOENT;
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qobj = gem_to_qxl_bo(gobj);
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*offset_p = qxl_bo_mmap_offset(qobj);
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drm_gem_object_unreference_unlocked(gobj);
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return 0;
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}
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