openwrt/target/linux/at91/patches-5.10/166-media-atmel-atmel-isc-add-CBC-to-the-reg-offsets-str.patch

From 52e4b779ae1af3e322d0c673375dcd51315739d4 Mon Sep 17 00:00:00 2001
From: Eugen Hristev <eugen.hristev@microchip.com>
Date: Tue, 13 Apr 2021 12:57:08 +0200
Subject: [PATCH 166/247] media: atmel: atmel-isc: add CBC to the reg offsets
 struct

The CBC submodule is a part of the atmel-isc pipeline, and stands for
Contrast Brightness Control. It is used to apply gains and offsets to the
luma (Y) and chroma (U, V) components of the YUV elements.
Add cbc to the reg offsets struct. This will allow different products
to have a different reg offset for this particular module.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/platform/atmel/atmel-isc-base.c    | 2 +-
 drivers/media/platform/atmel/atmel-isc-regs.h    | 3 +++
 drivers/media/platform/atmel/atmel-isc.h         | 2 ++
 drivers/media/platform/atmel/atmel-sama5d2-isc.c | 7 +++++--
 4 files changed, 11 insertions(+), 3 deletions(-)

--- a/drivers/media/platform/atmel/atmel-isc-base.c
+++ b/drivers/media/platform/atmel/atmel-isc-base.c
@@ -2325,7 +2325,7 @@ int isc_pipeline_init(struct isc_device
 		REG_FIELD(ISC_GAM_CTRL, 2, 2),
 		REG_FIELD(ISC_GAM_CTRL, 3, 3),
 		REG_FIELD(ISC_CSC_CTRL + isc->offsets.csc, 0, 0),
-		REG_FIELD(ISC_CBC_CTRL, 0, 0),
+		REG_FIELD(ISC_CBC_CTRL + isc->offsets.cbc, 0, 0),
 		REG_FIELD(ISC_SUB422_CTRL, 0, 0),
 		REG_FIELD(ISC_SUB420_CTRL, 0, 0),
 	};
--- a/drivers/media/platform/atmel/atmel-isc-regs.h
+++ b/drivers/media/platform/atmel/atmel-isc-regs.h
@@ -177,6 +177,9 @@
 /* Color Space Conversion CRB OCR Register */
 #define ISC_CSC_CRB_OCR	0x000003b0
 
+/* Offset for CBC register specific to sama5d2 product */
+#define ISC_SAMA5D2_CBC_OFFSET	0
+
 /* Contrast And Brightness Control Register */
 #define ISC_CBC_CTRL    0x000003b4
 
--- a/drivers/media/platform/atmel/atmel-isc.h
+++ b/drivers/media/platform/atmel/atmel-isc.h
@@ -146,9 +146,11 @@ struct isc_ctrls {
 /*
  * struct isc_reg_offsets - ISC device register offsets
  * @csc:		Offset for the CSC register
+ * @cbc:		Offset for the CBC register
  */
 struct isc_reg_offsets {
 	u32 csc;
+	u32 cbc;
 };
 
 /*
--- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
+++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
@@ -77,8 +77,10 @@ static void isc_sama5d2_config_cbc(struc
 {
 	struct regmap *regmap = isc->regmap;
 
-	regmap_write(regmap, ISC_CBC_BRIGHT, isc->ctrls.brightness);
-	regmap_write(regmap, ISC_CBC_CONTRAST, isc->ctrls.contrast);
+	regmap_write(regmap, ISC_CBC_BRIGHT + isc->offsets.cbc,
+		     isc->ctrls.brightness);
+	regmap_write(regmap, ISC_CBC_CONTRAST + isc->offsets.cbc,
+		     isc->ctrls.contrast);
 }
 
 /* Gamma table with gamma 1/2.2 */
@@ -250,6 +252,7 @@ static int atmel_isc_probe(struct platfo
 	isc->config_cbc = isc_sama5d2_config_cbc;
 
 	isc->offsets.csc = ISC_SAMA5D2_CSC_OFFSET;
+	isc->offsets.cbc = ISC_SAMA5D2_CBC_OFFSET;
 
 	/* sama5d2-isc - 8 bits per beat */
 	isc->dcfg = ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8;