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>
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@ -447,7 +447,9 @@ static void fimd_win_commit(struct device *dev)
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static void fimd_win_disable(struct device *dev)
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{
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struct fimd_context *ctx = get_fimd_context(dev);
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struct fimd_win_data *win_data;
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struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
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struct drm_device *drm_dev = subdrv->drm_dev;
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struct exynos_drm_manager *manager = &subdrv->manager;
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int win = ctx->default_win;
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u32 val;
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@ -456,8 +458,6 @@ static void fimd_win_disable(struct device *dev)
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if (win < 0 || win > WINDOWS_NR)
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return;
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win_data = &ctx->win_data[win];
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/* protect windows */
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val = readl(ctx->regs + SHADOWCON);
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val |= SHADOWCON_WINx_PROTECT(win);
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@ -473,6 +473,29 @@ static void fimd_win_disable(struct device *dev)
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val &= ~SHADOWCON_CHx_ENABLE(win);
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val &= ~SHADOWCON_WINx_PROTECT(win);
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writel(val, ctx->regs + SHADOWCON);
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/* fimd dma off. */
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val = readl(ctx->regs + VIDCON0);
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val &= ~(VIDCON0_ENVID | VIDCON0_ENVID_F);
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writel(val, ctx->regs + VIDCON0);
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/*
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* if vblank is enabled status with dma off then
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* it disables vsync interrupt.
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*/
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if (drm_dev->vblank_enabled[manager->pipe] &&
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atomic_read(&drm_dev->vblank_refcount[manager->pipe])) {
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drm_vblank_put(drm_dev, manager->pipe);
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/*
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* if vblank_disable_allowed is 0 then disable vsync interrupt
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* right now else the vsync interrupt would be disabled by drm
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* timer once a current process gives up ownershop of
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* vblank event.
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*/
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if (!drm_dev->vblank_disable_allowed)
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drm_vblank_off(drm_dev, manager->pipe);
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}
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}
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static struct exynos_drm_overlay_ops fimd_overlay_ops = {
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@ -528,6 +551,16 @@ static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
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/* VSYNC interrupt */
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writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1);
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/*
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* in case that vblank_disable_allowed is 1, it could induce
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* the problem that manager->pipe could be -1 because with
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* disable callback, vsync interrupt isn't disabled and at this moment,
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* vsync interrupt could occur. the vsync interrupt would be disabled
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* by timer handler later.
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*/
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if (manager->pipe == -1)
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return IRQ_HANDLED;
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drm_handle_vblank(drm_dev, manager->pipe);
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fimd_finish_pageflip(drm_dev, manager->pipe);
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@ -548,13 +581,6 @@ static int fimd_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
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*/
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drm_dev->irq_enabled = 1;
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/*
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* with vblank_disable_allowed = 1, vblank interrupt will be disabled
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* by drm timer once a current process gives up ownership of
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* vblank event.(drm_vblank_put function was called)
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*/
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drm_dev->vblank_disable_allowed = 1;
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return 0;
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}
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