Implement crtc page_flip callback for bochsdrm. The qemu stdvga has no
vblank signaling, so we have to fake it. We do so by instantly calling
drm_send_vblank_event. Tested with kmscon.
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
drivers/gpu/drm/bochs/bochs_kms.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
index 6b7efcf3..ee2013b 100644
--- a/drivers/gpu/drm/bochs/bochs_kms.c
+++ b/drivers/gpu/drm/bochs/bochs_kms.c
@@ -108,11 +108,32 @@ static void bochs_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
{
}
+static int bochs_crtc_page_flip(struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_pending_vblank_event *event,
+ uint32_t page_flip_flags)
+{
+ struct bochs_device *bochs =
+ container_of(crtc, struct bochs_device, crtc);
+ struct drm_framebuffer *old_fb = crtc->primary->fb;
+ unsigned long irqflags;
+
+ crtc->primary->fb = fb;
+ bochs_crtc_mode_set_base(crtc, 0, 0, old_fb);
+ if (event) {
+ spin_lock_irqsave(&bochs->dev->event_lock, irqflags);
+ drm_send_vblank_event(bochs->dev, -1, event);
+ spin_unlock_irqrestore(&bochs->dev->event_lock, irqflags);
+ }
+ return 0;
+}
+
/* These provide the minimum set of functions required to handle a CRTC */
static const struct drm_crtc_funcs bochs_crtc_funcs = {
.gamma_set = bochs_crtc_gamma_set,
.set_config = drm_crtc_helper_set_config,
.destroy = drm_crtc_cleanup,
+ .page_flip = bochs_crtc_page_flip,
};
static const struct drm_crtc_helper_funcs bochs_helper_funcs = {
--
1.8.3.1
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