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drm/rockchip: vop: skip config timing on vblank

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Change-Id: I7aace5e26f6c9889c9e216f7b7233ec7e5530776
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
This commit is contained in:
Mark Yao
2016-12-02 17:34:53 +08:00
parent 433e5da577
commit a8091fbafa
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/rockchip/rockchip_drm_vop.c
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@@ -1338,14 +1338,19 @@ static void vop_crtc_enable(struct drm_crtc *crtc)
u16 vsync_len = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
u16 vact_st = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_start;
u16 vact_end = vact_st + vdisplay;
uint32_t version = vop->data->version;
uint32_t val;
vop_enable(crtc);
/*
* If dclk rate is zero, mean that scanout is stop,
* we don't need wait any more.
*
* Since vop version(3,4), vop timing is frame effect, not need config
* timing register on vblank.
*/
if (clk_get_rate(vop->dclk)) {
if (clk_get_rate(vop->dclk) &&
!(VOP_MAJOR(version) == 3 && VOP_MINOR(version) >= 4)) {
/*
* Rk3288 vop timing register is immediately, when configure
* display timing on display time, may cause tearing.