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drm/imx: track flip state explicitly 

Start tracking the flip state explicitly, as opposed to inferring
it from the presence if a new FB. This is a preparatory step to
introduce an new immediate state, where we can wait for a fence to
signal.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Lucas Stach 2016-02-04 10:15:10 +01:00 committed by Philipp Zabel
parent f5dca1608b
commit 0bfc2b3d01
1 changed files with 10 additions and 5 deletions
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15
drivers/gpu/drm/imx/ipuv3-crtc.c
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@ -31,6 +31,11 @@
#define DRIVER_DESC "i.MX IPUv3 Graphics"
enum ipu_flip_status {
IPU_FLIP_NONE,
IPU_FLIP_PENDING,
};
struct ipu_crtc {
struct device *dev;
struct drm_crtc base;
@ -42,8 +47,8 @@ struct ipu_crtc {
struct ipu_dc *dc;
struct ipu_di *di;
int enabled;
enum ipu_flip_status flip_state;
struct drm_pending_vblank_event *page_flip_event;
struct drm_framebuffer *newfb;
int irq;
u32 bus_format;
int di_hsync_pin;
@ -110,7 +115,7 @@ static int ipu_page_flip(struct drm_crtc *crtc,
struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
int ret;
if (ipu_crtc->newfb)
if (ipu_crtc->flip_state != IPU_FLIP_NONE)
return -EBUSY;
ret = imx_drm_crtc_vblank_get(ipu_crtc->imx_crtc);
@ -121,8 +126,8 @@ static int ipu_page_flip(struct drm_crtc *crtc,
return ret;
}
ipu_crtc->newfb = fb;
ipu_crtc->page_flip_event = event;
ipu_crtc->flip_state = IPU_FLIP_PENDING;
return 0;
}
@ -224,13 +229,13 @@ static irqreturn_t ipu_irq_handler(int irq, void *dev_id)
imx_drm_handle_vblank(ipu_crtc->imx_crtc);
if (ipu_crtc->newfb) {
if (ipu_crtc->flip_state == IPU_FLIP_PENDING) {
struct ipu_plane *plane = ipu_crtc->plane[0];
ipu_crtc->newfb = NULL;
ipu_plane_set_base(plane, ipu_crtc->base.primary->fb,
plane->x, plane->y);
ipu_crtc_handle_pageflip(ipu_crtc);
ipu_crtc->flip_state = IPU_FLIP_NONE;
}
return IRQ_HANDLED;