summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorMark Yao <mark.yao@rock-chips.com>2015-02-04 13:10:31 +0800
committerMark Yao <mark.yao@rock-chips.com>2015-03-16 13:50:57 +0800
commit1067219b27e29e925e7bdbb85b72c4c2bec0267e (patch)
tree430c815856edad28881382ae06cbe655d05a0953
parent52ab7891fb8e45bda6015da8b5ac82ad600355e3 (diff)
drm/rockchip: vop: power off until vop standby take effect
Vop standby will take effect at end of current frame, if dsp_hold_valid_irq happen, it means vop standby complete. we must wait standby complete when we want to disable aclk, if not, memory bus maybe dead. Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Daniel Kurtz <djkurtz@chromium.org> Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
-rw-r--r--drivers/gpu/drm/rockchip/rockchip_drm_vop.c77
1 files changed, 64 insertions, 13 deletions
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 04b619a8d064..d041921b3bb9 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -89,6 +89,7 @@ struct vop {
/* mutex vsync_ work */
struct mutex vsync_mutex;
bool vsync_work_pending;
+ struct completion dsp_hold_completion;
const struct vop_data *data;
@@ -382,6 +383,36 @@ static bool is_alpha_support(uint32_t format)
}
}
+static void vop_dsp_hold_valid_irq_enable(struct vop *vop)
+{
+ unsigned long flags;
+
+ if (WARN_ON(!vop->is_enabled))
+ return;
+
+ spin_lock_irqsave(&vop->irq_lock, flags);
+
+ vop_mask_write(vop, INTR_CTRL0, DSP_HOLD_VALID_INTR_MASK,
+ DSP_HOLD_VALID_INTR_EN(1));
+
+ spin_unlock_irqrestore(&vop->irq_lock, flags);
+}
+
+static void vop_dsp_hold_valid_irq_disable(struct vop *vop)
+{
+ unsigned long flags;
+
+ if (WARN_ON(!vop->is_enabled))
+ return;
+
+ spin_lock_irqsave(&vop->irq_lock, flags);
+
+ vop_mask_write(vop, INTR_CTRL0, DSP_HOLD_VALID_INTR_MASK,
+ DSP_HOLD_VALID_INTR_EN(0));
+
+ spin_unlock_irqrestore(&vop->irq_lock, flags);
+}
+
static void vop_enable(struct drm_crtc *crtc)
{
struct vop *vop = to_vop(crtc);
@@ -454,26 +485,36 @@ static void vop_disable(struct drm_crtc *crtc)
drm_vblank_off(crtc->dev, vop->pipe);
- disable_irq(vop->irq);
-
/*
- * TODO: Since standby doesn't take effect until the next vblank,
- * when we turn off dclk below, the vop is probably still active.
+ * Vop standby will take effect at end of current frame,
+ * if dsp hold valid irq happen, it means standby complete.
+ *
+ * we must wait standby complete when we want to disable aclk,
+ * if not, memory bus maybe dead.
*/
+ reinit_completion(&vop->dsp_hold_completion);
+ vop_dsp_hold_valid_irq_enable(vop);
+
spin_lock(&vop->reg_lock);
VOP_CTRL_SET(vop, standby, 1);
spin_unlock(&vop->reg_lock);
+ wait_for_completion(&vop->dsp_hold_completion);
+
+ vop_dsp_hold_valid_irq_disable(vop);
+
+ disable_irq(vop->irq);
+
vop->is_enabled = false;
+
/*
- * disable dclk to stop frame scan, so we can safely detach iommu,
+ * vop standby complete, so iommu detach is safe.
*/
- clk_disable(vop->dclk);
-
rockchip_drm_dma_detach_device(vop->drm_dev, vop->dev);
+ clk_disable(vop->dclk);
clk_disable(vop->aclk);
clk_disable(vop->hclk);
}
@@ -1086,6 +1127,7 @@ static irqreturn_t vop_isr(int irq, void *data)
struct vop *vop = data;
uint32_t intr0_reg, active_irqs;
unsigned long flags;
+ int ret = IRQ_NONE;
/*
* INTR_CTRL0 register has interrupt status, enable and clear bits, we
@@ -1104,15 +1146,23 @@ static irqreturn_t vop_isr(int irq, void *data)
if (!active_irqs)
return IRQ_NONE;
- /* Only Frame Start Interrupt is enabled; other irqs are spurious. */
- if (!(active_irqs & FS_INTR)) {
- DRM_ERROR("Unknown VOP IRQs: %#02x\n", active_irqs);
- return IRQ_NONE;
+ if (active_irqs & DSP_HOLD_VALID_INTR) {
+ complete(&vop->dsp_hold_completion);
+ active_irqs &= ~DSP_HOLD_VALID_INTR;
+ ret = IRQ_HANDLED;
}
- drm_handle_vblank(vop->drm_dev, vop->pipe);
+ if (active_irqs & FS_INTR) {
+ drm_handle_vblank(vop->drm_dev, vop->pipe);
+ active_irqs &= ~FS_INTR;
+ ret = (vop->vsync_work_pending) ? IRQ_WAKE_THREAD : IRQ_HANDLED;
+ }
- return (vop->vsync_work_pending) ? IRQ_WAKE_THREAD : IRQ_HANDLED;
+ /* Unhandled irqs are spurious. */
+ if (active_irqs)
+ DRM_ERROR("Unknown VOP IRQs: %#02x\n", active_irqs);
+
+ return ret;
}
static int vop_create_crtc(struct vop *vop)
@@ -1194,6 +1244,7 @@ static int vop_create_crtc(struct vop *vop)
goto err_cleanup_crtc;
}
+ init_completion(&vop->dsp_hold_completion);
crtc->port = port;
vop->pipe = drm_crtc_index(crtc);
rockchip_register_crtc_funcs(drm_dev, &private_crtc_funcs, vop->pipe);