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authorLucas Stach <l.stach@pengutronix.de>2018-09-11 16:20:34 +0300
committerPhilipp Zabel <p.zabel@pengutronix.de>2019-02-22 13:58:45 +0300
commit0a29b1abaf5ba86b2ef5da5a1403ff64dc0d9449 (patch)
tree89ead7c32316adc13d6b97c949b70a862e4aae93 /drivers/gpu/ipu-v3
parenta3b22b9f11d9fbc48b0291ea92259a5a810e9438 (diff)
downloadlinux-0a29b1abaf5ba86b2ef5da5a1403ff64dc0d9449.tar.xz
gpu: ipu-v3: pre: add double buffer status readback
This allows the upper layers to check if a double buffer update has been applied by the PRE or is still pending. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> [p.zabel@pengutronix.de: inverted logic: done -> pending] Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/gpu/ipu-v3')
-rw-r--r--drivers/gpu/ipu-v3/ipu-pre.c6
-rw-r--r--drivers/gpu/ipu-v3/ipu-prv.h1
2 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-pre.c b/drivers/gpu/ipu-v3/ipu-pre.c
index 4a28f3fbb0a2..6cacfd61d984 100644
--- a/drivers/gpu/ipu-v3/ipu-pre.c
+++ b/drivers/gpu/ipu-v3/ipu-pre.c
@@ -265,6 +265,12 @@ void ipu_pre_update(struct ipu_pre *pre, unsigned int bufaddr)
writel(IPU_PRE_CTRL_SDW_UPDATE, pre->regs + IPU_PRE_CTRL_SET);
}
+bool ipu_pre_update_pending(struct ipu_pre *pre)
+{
+ return !!(readl_relaxed(pre->regs + IPU_PRE_CTRL) &
+ IPU_PRE_CTRL_SDW_UPDATE);
+}
+
u32 ipu_pre_get_baddr(struct ipu_pre *pre)
{
return (u32)pre->buffer_paddr;
diff --git a/drivers/gpu/ipu-v3/ipu-prv.h b/drivers/gpu/ipu-v3/ipu-prv.h
index d6beee99b6b8..38622e835e95 100644
--- a/drivers/gpu/ipu-v3/ipu-prv.h
+++ b/drivers/gpu/ipu-v3/ipu-prv.h
@@ -272,6 +272,7 @@ void ipu_pre_configure(struct ipu_pre *pre, unsigned int width,
unsigned int height, unsigned int stride, u32 format,
uint64_t modifier, unsigned int bufaddr);
void ipu_pre_update(struct ipu_pre *pre, unsigned int bufaddr);
+bool ipu_pre_update_pending(struct ipu_pre *pre);
struct ipu_prg *ipu_prg_lookup_by_phandle(struct device *dev, const char *name,
int ipu_id);