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From 0db91d2a803221c313c9f2cd1d71050d7c5a7b5b Mon Sep 17 00:00:00 2001
From: Eugen Hristev <eugen.hristev@microchip.com>
Date: Tue, 13 Apr 2021 12:57:17 +0200
Subject: [PATCH 175/247] media: atmel: atmel-isc: add CC initialization
function
The CC submodule is a part of the atmel-isc pipeline, and stands for
Color Correction. It is used to apply gains and offsets to the
chroma (U, V) components of the YUV elements.
Implement the CC submodule initialization, as a product
specific function, which currently configures the neutral point in color
correction.
[hverkuil: made isc_sama5d2_config_cc static]
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 | 1 +
drivers/media/platform/atmel/atmel-isc.h | 3 +++
drivers/media/platform/atmel/atmel-sama5d2-isc.c | 14 ++++++++++++++
3 files changed, 18 insertions(+)
--- a/drivers/media/platform/atmel/atmel-isc-base.c
+++ b/drivers/media/platform/atmel/atmel-isc-base.c
@@ -661,6 +661,7 @@ static void isc_set_pipeline(struct isc_
isc->config_csc(isc);
isc->config_cbc(isc);
+ isc->config_cc(isc);
}
static int isc_update_profile(struct isc_device *isc)
--- a/drivers/media/platform/atmel/atmel-isc.h
+++ b/drivers/media/platform/atmel/atmel-isc.h
@@ -224,6 +224,8 @@ struct isc_reg_offsets {
* specific CSC module
* @config_cbc: pointer to a function that initializes product
* specific CBC module
+ * @config_cc: pointer to a function that initializes product
+ * specific CC module
*
* @offsets: struct holding the product specific register offsets
*/
@@ -297,6 +299,7 @@ struct isc_device {
struct {
void (*config_csc)(struct isc_device *isc);
void (*config_cbc)(struct isc_device *isc);
+ void (*config_cc)(struct isc_device *isc);
};
struct isc_reg_offsets offsets;
--- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
+++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
@@ -83,6 +83,19 @@ static void isc_sama5d2_config_cbc(struc
isc->ctrls.contrast);
}
+static void isc_sama5d2_config_cc(struct isc_device *isc)
+{
+ struct regmap *regmap = isc->regmap;
+
+ /* Configure each register at the neutral fixed point 1.0 or 0.0 */
+ regmap_write(regmap, ISC_CC_RR_RG, (1 << 8));
+ regmap_write(regmap, ISC_CC_RB_OR, 0);
+ regmap_write(regmap, ISC_CC_GR_GG, (1 << 8) << 16);
+ regmap_write(regmap, ISC_CC_GB_OG, 0);
+ regmap_write(regmap, ISC_CC_BR_BG, 0);
+ regmap_write(regmap, ISC_CC_BB_OB, (1 << 8));
+}
+
/* Gamma table with gamma 1/2.2 */
static const u32 isc_sama5d2_gamma_table[][GAMMA_ENTRIES] = {
/* 0 --> gamma 1/1.8 */
@@ -251,6 +264,7 @@ static int atmel_isc_probe(struct platfo
isc->config_csc = isc_sama5d2_config_csc;
isc->config_cbc = isc_sama5d2_config_cbc;
+ isc->config_cc = isc_sama5d2_config_cc;
isc->offsets.csc = ISC_SAMA5D2_CSC_OFFSET;
isc->offsets.cbc = ISC_SAMA5D2_CBC_OFFSET;
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