drm/qxl: simple crtc page flipping emulated using buffer copy

Signed-off-by: Andreas Pokorny <andreas.pokorny@canonical.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index b8ced08..af9e785 100644 (file)
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -187,6 +187,54 @@ static void qxl_crtc_destroy(struct drm_crtc *crtc)
        kfree(qxl_crtc);
 }
 
+static int qxl_crtc_page_flip(struct drm_crtc *crtc,
+                              struct drm_framebuffer *fb,
+                              struct drm_pending_vblank_event *event,
+                              uint32_t page_flip_flags)
+{
+       struct drm_device *dev = crtc->dev;
+       struct qxl_device *qdev = dev->dev_private;
+       struct qxl_crtc *qcrtc = to_qxl_crtc(crtc);
+       struct qxl_framebuffer *qfb_src = to_qxl_framebuffer(fb);
+       struct qxl_framebuffer *qfb_old = to_qxl_framebuffer(crtc->primary->fb);
+       struct qxl_bo *bo_old = gem_to_qxl_bo(qfb_old->obj);
+       struct qxl_bo *bo = gem_to_qxl_bo(qfb_src->obj);
+       unsigned long flags;
+       struct drm_clip_rect norect = {
+           .x1 = 0,
+           .y1 = 0,
+           .x2 = fb->width,
+           .y2 = fb->height
+       };
+       int inc = 1;
+       int one_clip_rect = 1;
+       int ret = 0;
+
+       crtc->primary->fb = fb;
+       bo_old->is_primary = false;
+       bo->is_primary = true;
+
+       ret = qxl_bo_reserve(bo, false);
+       if (ret)
+               return ret;
+
+       qxl_draw_dirty_fb(qdev, qfb_src, bo, 0, 0,
+                         &norect, one_clip_rect, inc);
+
+       drm_vblank_get(dev, qcrtc->index);
+
+       if (event) {
+               spin_lock_irqsave(&dev->event_lock, flags);
+               drm_send_vblank_event(dev, qcrtc->index, event);
+               spin_unlock_irqrestore(&dev->event_lock, flags);
+       }
+       drm_vblank_put(dev, qcrtc->index);
+
+       qxl_bo_unreserve(bo);
+
+       return 0;
+}
+
 static int
 qxl_hide_cursor(struct qxl_device *qdev)
 {
@@ -374,6 +422,7 @@ static const struct drm_crtc_funcs qxl_crtc_funcs = {
        .cursor_move = qxl_crtc_cursor_move,
        .set_config = drm_crtc_helper_set_config,
        .destroy = qxl_crtc_destroy,
+       .page_flip = qxl_crtc_page_flip,
 };
 
 static void qxl_user_framebuffer_destroy(struct drm_framebuffer *fb)

diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
index a3fd920..b8a3eae 100644 (file)
--- a/drivers/gpu/drm/qxl/qxl_drv.c
+++ b/drivers/gpu/drm/qxl/qxl_drv.c
@@ -84,6 +84,7 @@ static const struct file_operations qxl_fops = {
        .release = drm_release,
        .unlocked_ioctl = drm_ioctl,
        .poll = drm_poll,
+       .read = drm_read,
        .mmap = qxl_mmap,
 };
 
@@ -195,6 +196,20 @@ static int qxl_pm_restore(struct device *dev)
        return qxl_drm_resume(drm_dev, false);
 }
 
+static u32 qxl_noop_get_vblank_counter(struct drm_device *dev, int crtc)
+{
+       return dev->vblank[crtc].count.counter;
+}
+
+static int qxl_noop_enable_vblank(struct drm_device *dev, int crtc)
+{
+       return 0;
+}
+
+static void qxl_noop_disable_vblank(struct drm_device *dev, int crtc)
+{
+}
+
 static const struct dev_pm_ops qxl_pm_ops = {
        .suspend = qxl_pm_suspend,
        .resume = qxl_pm_resume,
@@ -216,6 +231,9 @@ static struct drm_driver qxl_driver = {
                           DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED,
        .load = qxl_driver_load,
        .unload = qxl_driver_unload,
+       .get_vblank_counter = qxl_noop_get_vblank_counter,
+       .enable_vblank = qxl_noop_enable_vblank,
+       .disable_vblank = qxl_noop_disable_vblank,
 
        .dumb_create = qxl_mode_dumb_create,
        .dumb_map_offset = qxl_mode_dumb_mmap,

diff --git a/drivers/gpu/drm/qxl/qxl_kms.c b/drivers/gpu/drm/qxl/qxl_kms.c
index 7234561..b2977a1 100644 (file)
--- a/drivers/gpu/drm/qxl/qxl_kms.c
+++ b/drivers/gpu/drm/qxl/qxl_kms.c
@@ -298,6 +298,9 @@ int qxl_driver_unload(struct drm_device *dev)
 
        if (qdev == NULL)
                return 0;
+
+       drm_vblank_cleanup(dev);
+
        qxl_modeset_fini(qdev);
        qxl_device_fini(qdev);
 
@@ -325,15 +328,20 @@ int qxl_driver_load(struct drm_device *dev, unsigned long flags)
        if (r)
                goto out;
 
+       r = drm_vblank_init(dev, 1);
+       if (r)
+               goto unload;
+
        r = qxl_modeset_init(qdev);
-       if (r) {
-               qxl_driver_unload(dev);
-               goto out;
-       }
+       if (r)
+               goto unload;
 
        drm_kms_helper_poll_init(qdev->ddev);
 
        return 0;
+unload:
+       qxl_driver_unload(dev);
+
 out:
        kfree(qdev);
        return r;