[PATCH 6.18.y 1/3] media: microchip-isc: store the unshifted PFE_CFG0 BPS value

[Sasha Levin <sashal@kernel.org>]

From: Balakrishnan Sambath <balakrishnan.s@microchip.com>

[ Upstream commit 14cbe597504a04c5c49342d0566438e2b438a948 ]

pfe_cfg0_bps held a pre-shifted BPS value (ISC_PFE_CFG0_BPS_EIGHT was
0x4 << 28) ORed straight into the register. The other format selectors
like cfa_baycfg store the bare field value and position it at the write,
so this one was inconsistent.

Store the bare BPS value and apply it with FIELD_PREP() at the PFE_CFG0
write, and fix the pfe_cfg0_bps comment to match. No functional change.

Suggested-by: Eugen Hristev <ehristev@kernel.org>
Signed-off-by: Balakrishnan Sambath <balakrishnan.s@microchip.com>
Reviewed-by: Eugen Hristev <ehristev@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Stable-dep-of: bb96c78c5f87 ("media: microchip-isc: fix SBGGR10 Bayer pattern")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/platform/microchip/microchip-isc-base.c |  4 +++-
 drivers/media/platform/microchip/microchip-isc-regs.h | 10 +++++-----
 drivers/media/platform/microchip/microchip-isc.h      |  4 +++-
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/microchip/microchip-isc-base.c b/drivers/media/platform/microchip/microchip-isc-base.c
index 85cd86bed7ba9..963d5fd53b589 100644
--- a/drivers/media/platform/microchip/microchip-isc-base.c
+++ b/drivers/media/platform/microchip/microchip-isc-base.c
@@ -8,6 +8,7 @@
  * Author: Eugen Hristev <eugen.hristev@microchip.com>
  *
  */
+#include <linux/bitfield.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/math64.h>
@@ -291,7 +292,8 @@ static int isc_configure(struct isc_device *isc)
 	struct isc_subdev_entity *subdev = isc->current_subdev;
 	int ret;
 
-	pfe_cfg0 = isc->config.sd_format->pfe_cfg0_bps;
+	pfe_cfg0 = FIELD_PREP(ISC_PFE_CFG0_BPS_MASK,
+			      isc->config.sd_format->pfe_cfg0_bps);
 	pipeline = isc->config.bits_pipeline;
 
 	dcfg = isc->config.dcfg_imode | isc->dcfg;
diff --git a/drivers/media/platform/microchip/microchip-isc-regs.h b/drivers/media/platform/microchip/microchip-isc-regs.h
index 166f57e6ed5d7..cabecf128b37a 100644
--- a/drivers/media/platform/microchip/microchip-isc-regs.h
+++ b/drivers/media/platform/microchip/microchip-isc-regs.h
@@ -31,11 +31,11 @@
 #define ISC_PFE_CFG0_MODE_PROGRESSIVE   (0x0 << 4)
 #define ISC_PFE_CFG0_MODE_MASK          GENMASK(6, 4)
 
-#define ISC_PFE_CFG0_BPS_EIGHT  (0x4 << 28)
-#define ISC_PFG_CFG0_BPS_NINE   (0x3 << 28)
-#define ISC_PFG_CFG0_BPS_TEN    (0x2 << 28)
-#define ISC_PFG_CFG0_BPS_ELEVEN (0x1 << 28)
-#define ISC_PFG_CFG0_BPS_TWELVE (0x0 << 28)
+#define ISC_PFE_CFG0_BPS_EIGHT  0x4
+#define ISC_PFG_CFG0_BPS_NINE   0x3
+#define ISC_PFG_CFG0_BPS_TEN    0x2
+#define ISC_PFG_CFG0_BPS_ELEVEN 0x1
+#define ISC_PFG_CFG0_BPS_TWELVE 0x0
 #define ISC_PFE_CFG0_BPS_MASK   GENMASK(30, 28)
 
 #define ISC_PFE_CFG0_COLEN	BIT(12)
diff --git a/drivers/media/platform/microchip/microchip-isc.h b/drivers/media/platform/microchip/microchip-isc.h
index f5e322c2e36bc..d7bcd74efff92 100644
--- a/drivers/media/platform/microchip/microchip-isc.h
+++ b/drivers/media/platform/microchip/microchip-isc.h
@@ -62,7 +62,9 @@ struct isc_subdev_entity {
  * @mbus_code:		V4L2 media bus format code.
  * @cfa_baycfg:		If this format is RAW BAYER, indicate the type of bayer.
 			this is either BGBG, RGRG, etc.
- * @pfe_cfg0_bps:	Number of hardware data lines connected to the ISC
+ * @pfe_cfg0_bps:	ISC_PFE_CFG0 BPS field value (e.g. ISC_PFE_CFG0_BPS_EIGHT),
+			written into PFE_CFG0 with FIELD_PREP(ISC_PFE_CFG0_BPS_MASK)
+			at configure time.
  * @raw:		If the format is raw bayer.
  */
 
-- 
2.53.0