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drm/exynos: fix vblank bug. 

In case that vblank_disable_allowed is 1, the problem that manager->pipe
could be -1 at vsync interrupt handler could be induced so this patch fixes
that.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
hifive-unleashed-5.1
Inki Dae 2011-11-11 21:28:00 +09:00
parent 2c871127e9
commit 483b88f86e
1 changed files with 36 additions and 10 deletions
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46
drivers/gpu/drm/exynos/exynos_drm_fimd.c
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@ -447,7 +447,9 @@ static void fimd_win_commit(struct device *dev)
static void fimd_win_disable(struct device *dev)
{
struct fimd_context *ctx = get_fimd_context(dev);
struct fimd_win_data *win_data;
struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
struct drm_device *drm_dev = subdrv->drm_dev;
struct exynos_drm_manager *manager = &subdrv->manager;
int win = ctx->default_win;
u32 val;
@ -456,8 +458,6 @@ static void fimd_win_disable(struct device *dev)
if (win < 0 || win > WINDOWS_NR)
return;
win_data = &ctx->win_data[win];
/* protect windows */
val = readl(ctx->regs + SHADOWCON);
val |= SHADOWCON_WINx_PROTECT(win);
@ -473,6 +473,29 @@ static void fimd_win_disable(struct device *dev)
val &= ~SHADOWCON_CHx_ENABLE(win);
val &= ~SHADOWCON_WINx_PROTECT(win);
writel(val, ctx->regs + SHADOWCON);
/* fimd dma off. */
val = readl(ctx->regs + VIDCON0);
val &= ~(VIDCON0_ENVID | VIDCON0_ENVID_F);
writel(val, ctx->regs + VIDCON0);
/*
* if vblank is enabled status with dma off then
* it disables vsync interrupt.
*/
if (drm_dev->vblank_enabled[manager->pipe] &&
atomic_read(&drm_dev->vblank_refcount[manager->pipe])) {
drm_vblank_put(drm_dev, manager->pipe);
/*
* if vblank_disable_allowed is 0 then disable vsync interrupt
* right now else the vsync interrupt would be disabled by drm
* timer once a current process gives up ownershop of
* vblank event.
*/
if (!drm_dev->vblank_disable_allowed)
drm_vblank_off(drm_dev, manager->pipe);
}
}
static struct exynos_drm_overlay_ops fimd_overlay_ops = {
@ -528,6 +551,16 @@ static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
/* VSYNC interrupt */
writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1);
/*
* in case that vblank_disable_allowed is 1, it could induce
* the problem that manager->pipe could be -1 because with
* disable callback, vsync interrupt isn't disabled and at this moment,
* vsync interrupt could occur. the vsync interrupt would be disabled
* by timer handler later.
*/
if (manager->pipe == -1)
return IRQ_HANDLED;
drm_handle_vblank(drm_dev, manager->pipe);
fimd_finish_pageflip(drm_dev, manager->pipe);
@ -548,13 +581,6 @@ static int fimd_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
*/
drm_dev->irq_enabled = 1;
/*
* with vblank_disable_allowed = 1, vblank interrupt will be disabled
* by drm timer once a current process gives up ownership of
* vblank event.(drm_vblank_put function was called)
*/
drm_dev->vblank_disable_allowed = 1;
return 0;
}