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/**************************************************************************
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* Copyright Ā© 2011 VMware, Inc., Palo Alto, CA., USA
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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
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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, sub license, 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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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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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 NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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**************************************************************************/
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#include "vmwgfx_kms.h"
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#define vmw_crtc_to_sou(x) \
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container_of(x, struct vmw_screen_object_unit, base.crtc)
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#define vmw_encoder_to_sou(x) \
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container_of(x, struct vmw_screen_object_unit, base.encoder)
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#define vmw_connector_to_sou(x) \
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container_of(x, struct vmw_screen_object_unit, base.connector)
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struct vmw_screen_object_display {
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unsigned num_implicit;
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struct vmw_framebuffer *implicit_fb;
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* Display unit using screen objects.
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struct vmw_screen_object_unit {
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struct vmw_display_unit base;
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unsigned long buffer_size; /**< Size of allocated buffer */
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struct vmw_dma_buffer *buffer; /**< Backing store buffer */
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static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
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vmw_display_unit_cleanup(&sou->base);
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* Screen Object Display Unit CRTC functions
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static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
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vmw_sou_destroy(vmw_crtc_to_sou(crtc));
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static void vmw_sou_del_active(struct vmw_private *vmw_priv,
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struct vmw_screen_object_unit *sou)
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struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
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if (sou->active_implicit) {
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if (--(ld->num_implicit) == 0)
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ld->implicit_fb = NULL;
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sou->active_implicit = false;
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static void vmw_sou_add_active(struct vmw_private *vmw_priv,
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struct vmw_screen_object_unit *sou,
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struct vmw_framebuffer *vfb)
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struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
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BUG_ON(!ld->num_implicit && ld->implicit_fb);
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if (!sou->active_implicit && sou->base.is_implicit) {
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ld->implicit_fb = vfb;
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sou->active_implicit = true;
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* Send the fifo command to create a screen.
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static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
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struct vmw_screen_object_unit *sou,
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uint32_t x, uint32_t y,
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struct drm_display_mode *mode)
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SVGAScreenObject obj;
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BUG_ON(!sou->buffer);
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fifo_size = sizeof(*cmd);
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cmd = vmw_fifo_reserve(dev_priv, fifo_size);
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/* The hardware has hung, nothing we can do about it here. */
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if (unlikely(cmd == NULL)) {
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DRM_ERROR("Fifo reserve failed.\n");
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memset(cmd, 0, fifo_size);
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cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
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cmd->obj.structSize = sizeof(SVGAScreenObject);
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cmd->obj.id = sou->base.unit;
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cmd->obj.flags = SVGA_SCREEN_HAS_ROOT |
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(sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
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cmd->obj.size.width = mode->hdisplay;
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cmd->obj.size.height = mode->vdisplay;
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if (sou->base.is_implicit) {
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cmd->obj.root.x = sou->base.gui_x;
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cmd->obj.root.y = sou->base.gui_y;
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/* Ok to assume that buffer is pinned in vram */
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vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
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cmd->obj.backingStore.pitch = mode->hdisplay * 4;
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vmw_fifo_commit(dev_priv, fifo_size);
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* Send the fifo command to destroy a screen.
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static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
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struct vmw_screen_object_unit *sou)
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SVGAFifoCmdDestroyScreen body;
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/* no need to do anything */
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if (unlikely(!sou->defined))
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fifo_size = sizeof(*cmd);
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cmd = vmw_fifo_reserve(dev_priv, fifo_size);
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/* the hardware has hung, nothing we can do about it here */
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if (unlikely(cmd == NULL)) {
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DRM_ERROR("Fifo reserve failed.\n");
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memset(cmd, 0, fifo_size);
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cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
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cmd->body.screenId = sou->base.unit;
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vmw_fifo_commit(dev_priv, fifo_size);
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ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
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if (unlikely(ret != 0))
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DRM_ERROR("Failed to sync with HW");
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sou->defined = false;
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* Free the backing store.
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static void vmw_sou_backing_free(struct vmw_private *dev_priv,
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struct vmw_screen_object_unit *sou)
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struct ttm_buffer_object *bo;
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if (unlikely(sou->buffer == NULL))
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bo = &sou->buffer->base;
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sou->buffer_size = 0;
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* Allocate the backing store for the buffer.
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static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,
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struct vmw_screen_object_unit *sou,
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if (sou->buffer_size == size)
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vmw_sou_backing_free(dev_priv, sou);
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sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);
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if (unlikely(sou->buffer == NULL))
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/* After we have alloced the backing store might not be able to
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* resume the overlays, this is preferred to failing to alloc.
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vmw_overlay_pause_all(dev_priv);
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ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,
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&vmw_vram_ne_placement,
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false, &vmw_dmabuf_bo_free);
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vmw_overlay_resume_all(dev_priv);
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if (unlikely(ret != 0))
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sou->buffer = NULL; /* vmw_dmabuf_init frees on error */
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sou->buffer_size = size;
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static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
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struct vmw_private *dev_priv;
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struct vmw_screen_object_unit *sou;
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struct drm_connector *connector;
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struct drm_display_mode *mode;
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struct drm_encoder *encoder;
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struct vmw_framebuffer *vfb;
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struct drm_framebuffer *fb;
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struct drm_crtc *crtc;
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sou = vmw_crtc_to_sou(crtc);
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vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
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dev_priv = vmw_priv(crtc->dev);
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if (set->num_connectors > 1) {
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DRM_ERROR("to many connectors\n");
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if (set->num_connectors == 1 &&
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set->connectors[0] != &sou->base.connector) {
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DRM_ERROR("connector doesn't match %p %p\n",
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set->connectors[0], &sou->base.connector);
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/* sou only supports one fb active at the time */
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if (sou->base.is_implicit &&
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dev_priv->sou_priv->implicit_fb && vfb &&
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!(dev_priv->sou_priv->num_implicit == 1 &&
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sou->active_implicit) &&
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dev_priv->sou_priv->implicit_fb != vfb) {
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DRM_ERROR("Multiple framebuffers not supported\n");
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/* since they always map one to one these are safe */
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connector = &sou->base.connector;
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encoder = &sou->base.encoder;
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/* should we turn the crtc off */
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if (set->num_connectors == 0 || !set->mode || !set->fb) {
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ret = vmw_sou_fifo_destroy(dev_priv, sou);
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/* the hardware has hung don't do anything more */
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if (unlikely(ret != 0))
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connector->encoder = NULL;
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encoder->crtc = NULL;
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vmw_sou_del_active(dev_priv, sou);
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vmw_sou_backing_free(dev_priv, sou);
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/* we now know we want to set a mode */
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if (set->x + mode->hdisplay > fb->width ||
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set->y + mode->vdisplay > fb->height) {
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DRM_ERROR("set outside of framebuffer\n");
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vmw_fb_off(dev_priv);
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if (mode->hdisplay != crtc->mode.hdisplay ||
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mode->vdisplay != crtc->mode.vdisplay) {
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/* no need to check if depth is different, because backing
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* store depth is forced to 4 by the device.
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ret = vmw_sou_fifo_destroy(dev_priv, sou);
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/* the hardware has hung don't do anything more */
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if (unlikely(ret != 0))
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vmw_sou_backing_free(dev_priv, sou);
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/* forced to depth 4 by the device */
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size_t size = mode->hdisplay * mode->vdisplay * 4;
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ret = vmw_sou_backing_alloc(dev_priv, sou, size);
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if (unlikely(ret != 0))
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ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);
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if (unlikely(ret != 0)) {
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* We are in a bit of a situation here, the hardware has
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* hung and we may or may not have a buffer hanging of
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* the screen object, best thing to do is not do anything
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* if we where defined, if not just turn the crtc of.
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* Not what userspace wants but it needs to htfu.
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connector->encoder = NULL;
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encoder->crtc = NULL;
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vmw_sou_add_active(dev_priv, sou, vfb);
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connector->encoder = encoder;
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encoder->crtc = crtc;
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static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
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.save = vmw_du_crtc_save,
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.restore = vmw_du_crtc_restore,
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.cursor_set = vmw_du_crtc_cursor_set,
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.cursor_move = vmw_du_crtc_cursor_move,
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.gamma_set = vmw_du_crtc_gamma_set,
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.destroy = vmw_sou_crtc_destroy,
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.set_config = vmw_sou_crtc_set_config,
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* Screen Object Display Unit encoder functions
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static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
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vmw_sou_destroy(vmw_encoder_to_sou(encoder));
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static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
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.destroy = vmw_sou_encoder_destroy,
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* Screen Object Display Unit connector functions
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static void vmw_sou_connector_destroy(struct drm_connector *connector)
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vmw_sou_destroy(vmw_connector_to_sou(connector));
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static struct drm_connector_funcs vmw_legacy_connector_funcs = {
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.dpms = vmw_du_connector_dpms,
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.save = vmw_du_connector_save,
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.restore = vmw_du_connector_restore,
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.detect = vmw_du_connector_detect,
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.fill_modes = vmw_du_connector_fill_modes,
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.set_property = vmw_du_connector_set_property,
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.destroy = vmw_sou_connector_destroy,
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static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
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struct vmw_screen_object_unit *sou;
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struct drm_device *dev = dev_priv->dev;
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struct drm_connector *connector;
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struct drm_encoder *encoder;
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struct drm_crtc *crtc;
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sou = kzalloc(sizeof(*sou), GFP_KERNEL);
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sou->base.unit = unit;
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crtc = &sou->base.crtc;
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encoder = &sou->base.encoder;
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connector = &sou->base.connector;
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sou->active_implicit = false;
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sou->base.pref_active = (unit == 0);
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sou->base.pref_width = 800;
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sou->base.pref_height = 600;
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sou->base.pref_mode = NULL;
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sou->base.is_implicit = true;
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drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
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DRM_MODE_CONNECTOR_VIRTUAL);
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connector->status = vmw_du_connector_detect(connector, true);
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drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
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DRM_MODE_ENCODER_VIRTUAL);
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drm_mode_connector_attach_encoder(connector, encoder);
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encoder->possible_crtcs = (1 << unit);
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encoder->possible_clones = 0;
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drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);
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drm_mode_crtc_set_gamma_size(crtc, 256);
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drm_connector_attach_property(connector,
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dev->mode_config.dirty_info_property,
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int vmw_kms_init_screen_object_display(struct vmw_private *dev_priv)
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struct drm_device *dev = dev_priv->dev;
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if (dev_priv->sou_priv) {
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DRM_INFO("sou system already on\n");
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if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_SCREEN_OBJECT_2)) {
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DRM_INFO("Not using screen objects,"
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" missing cap SCREEN_OBJECT_2\n");
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dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);
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if (unlikely(!dev_priv->sou_priv))
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dev_priv->sou_priv->num_implicit = 0;
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dev_priv->sou_priv->implicit_fb = NULL;
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ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
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if (unlikely(ret != 0))
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ret = drm_mode_create_dirty_info_property(dev);
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if (unlikely(ret != 0))
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goto err_vblank_cleanup;
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for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
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vmw_sou_init(dev_priv, i);
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DRM_INFO("Screen objects system initialized\n");
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drm_vblank_cleanup(dev);
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kfree(dev_priv->sou_priv);
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dev_priv->sou_priv = NULL;
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int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
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struct drm_device *dev = dev_priv->dev;
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if (!dev_priv->sou_priv)
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drm_vblank_cleanup(dev);
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kfree(dev_priv->sou_priv);