[RFC 1/2] gpu: ipu-v3: export memory reset function

[Philipp Zabel]

Add defines for the memory reset bits and export the memory reset
function to IPU modules.

Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
 drivers/gpu/ipu-v3/ipu-common.c | 17 +++++++++++++----
 drivers/gpu/ipu-v3/ipu-prv.h    | 24 ++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
index 5e7af61..1ad33df 100644
--- a/drivers/gpu/ipu-v3/ipu-common.c
+++ b/drivers/gpu/ipu-v3/ipu-common.c
@@ -706,14 +706,14 @@ void ipu_idmac_enable_watermark(struct ipuv3_channel *channel, bool enable)
 }
 EXPORT_SYMBOL_GPL(ipu_idmac_enable_watermark);
 
-static int ipu_memory_reset(struct ipu_soc *ipu)
+int ipu_memory_reset(struct ipu_soc *ipu, u32 rst_mem)
 {
 	unsigned long timeout;
 
-	ipu_cm_write(ipu, 0x807FFFFF, IPU_MEM_RST);
+	ipu_cm_write(ipu, rst_mem | IPU_RST_MEM_START, IPU_MEM_RST);
 
 	timeout = jiffies + msecs_to_jiffies(1000);
-	while (ipu_cm_read(ipu, IPU_MEM_RST) & 0x80000000) {
+	while (ipu_cm_read(ipu, IPU_MEM_RST) & IPU_RST_MEM_START) {
 		if (time_after(jiffies, timeout))
 			return -ETIME;
 		cpu_relax();
@@ -1363,7 +1363,16 @@ static int ipu_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "failed to reset: %d\n", ret);
 		goto out_failed_reset;
 	}
-	ret = ipu_memory_reset(ipu);
+	ret = ipu_memory_reset(ipu, IPU_RST_MEM_SRM | IPU_RST_MEM_ALPHA |
+			       IPU_RST_MEM_CPMEM | IPU_RST_MEM_TPM |
+			       IPU_RST_MEM_MPM | IPU_RST_MEM_BM |
+			       IPU_RST_MEM_RM | IPU_RST_MEM_DSTM |
+			       IPU_RST_MEM_DSOM | IPU_RST_MEM_LUT0 |
+			       IPU_RST_MEM_LUT1 | IPU_RST_MEM_RAM_SMFC |
+			       IPU_RST_MEM_VDI_FIFO2 | IPU_RST_MEM_VDI_FIFO3 |
+			       IPU_RST_MEM_ICB | IPU_RST_MEM_VDI_FIFO1 |
+			       IPU_RST_MEM_DC_TEMPLATE | IPU_RST_MEM_DMFC_RD |
+			       IPU_RST_MEM_DMFC_WR);
 	if (ret)
 		goto out_failed_reset;
 #endif
diff --git a/drivers/gpu/ipu-v3/ipu-prv.h b/drivers/gpu/ipu-v3/ipu-prv.h
index 6803cc7..8e9ef56 100644
--- a/drivers/gpu/ipu-v3/ipu-prv.h
+++ b/drivers/gpu/ipu-v3/ipu-prv.h
@@ -75,6 +75,28 @@ struct ipu_soc;
 #define IPU_INT_CTRL(n)		IPU_CM_REG(0x003C + 4 * (n))
 #define IPU_INT_STAT(n)		IPU_CM_REG(0x0200 + 4 * (n))
 
+#define IPU_RST_MEM_SRM			BIT(0)
+#define IPU_RST_MEM_ALPHA		BIT(1)
+#define IPU_RST_MEM_CPMEM		BIT(2)
+#define IPU_RST_MEM_TPM			BIT(3)
+#define IPU_RST_MEM_MPM			BIT(4)
+#define IPU_RST_MEM_BM			BIT(5)
+#define IPU_RST_MEM_RM			BIT(6)
+#define IPU_RST_MEM_DSTM		BIT(7)
+#define IPU_RST_MEM_DSOM		BIT(8)
+#define IPU_RST_MEM_LUT0		BIT(9)
+#define IPU_RST_MEM_LUT1		BIT(10)
+#define IPU_RST_MEM_RAM_SMFC		BIT(11)
+#define IPU_RST_MEM_VDI_FIFO2		BIT(12)
+#define IPU_RST_MEM_VDI_FIFO3		BIT(13)
+#define IPU_RST_MEM_ICB			BIT(14)
+#define IPU_RST_MEM_VDI_FIFO1		BIT(15)
+#define IPU_RST_MEM_DC_TEMPLATE		BIT(20)
+#define IPU_RST_MEM_DMFC_RD		BIT(21)
+#define IPU_RST_MEM_DMFC_WR		BIT(22)
+
+#define IPU_RST_MEM_START		BIT(31)
+
 #define IPU_DI0_COUNTER_RELEASE			(1 << 24)
 #define IPU_DI1_COUNTER_RELEASE			(1 << 25)
 
@@ -401,6 +423,8 @@ static inline void ipu_idmac_write(struct ipu_soc *ipu, u32 value,
 
 void ipu_srm_dp_sync_update(struct ipu_soc *ipu);
 
+int ipu_memory_reset(struct ipu_soc *ipu, u32 rst_mem);
+
 int ipu_module_enable(struct ipu_soc *ipu, u32 mask);
 int ipu_module_disable(struct ipu_soc *ipu, u32 mask);
 
-- 
2.8.1