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From:   Eugen Hristev <eugen.hristev@microchip.com>
To:     <devicetree@vger.kernel.org>, <linux-media@vger.kernel.org>,
        <jacopo@jmondi.org>, <robh+dt@kernel.org>
CC:     <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>,
        Eugen Hristev <eugen.hristev@microchip.com>
Subject: [PATCH v3 21/33] media: atmel: atmel-isc: create callback for DPC submodule product specific
Date:   Tue, 13 Apr 2021 13:57:19 +0300
Message-ID: <20210413105731.610028-22-eugen.hristev@microchip.com>
In-Reply-To: <20210413105731.610028-1-eugen.hristev@microchip.com>
References: <20210413105731.610028-1-eugen.hristev@microchip.com>
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Precedence: bulk

The DPC submodule is a part of the atmel-isc pipeline, and stands for
Defective Pixel Correction. Its purpose is to detect defective pixels and
correct them if possible with the help of adjacent pixels.
Create a product specific callback for initializing the DPC submodule
of the pipeline.
For sama5d2 product, this module does not exist, thus this function is a noop.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
Changes in v3:
- added module description in commit message
Changes in v2:
- addded function prototype to avoid warning with W=1

 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 | 7 +++++++
 3 files changed, 11 insertions(+)

diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c
index 69952b6ac401..1f7116abc61a 100644
--- a/drivers/media/platform/atmel/atmel-isc-base.c
+++ b/drivers/media/platform/atmel/atmel-isc-base.c
@@ -651,6 +651,7 @@ static void isc_set_pipeline(struct isc_device *isc, u32 pipeline)
 	regmap_bulk_write(regmap, ISC_GAM_GENTRY, gamma, GAMMA_ENTRIES);
 	regmap_bulk_write(regmap, ISC_GAM_RENTRY, gamma, GAMMA_ENTRIES);
 
+	isc->config_dpc(isc);
 	isc->config_csc(isc);
 	isc->config_cbc(isc);
 	isc->config_cc(isc);
diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h
index eb549fadb1a8..d6cd85a4c3e9 100644
--- a/drivers/media/platform/atmel/atmel-isc.h
+++ b/drivers/media/platform/atmel/atmel-isc.h
@@ -221,6 +221,8 @@ struct isc_reg_offsets {
  * @max_width:		maximum frame width, dependent on the internal RAM
  * @max_height:		maximum frame height, dependent on the internal RAM
  *
+ * @config_dpc:		pointer to a function that initializes product
+ *			specific DPC module
  * @config_csc:		pointer to a function that initializes product
  *			specific CSC module
  * @config_cbc:		pointer to a function that initializes product
@@ -300,6 +302,7 @@ struct isc_device {
 	u32		max_height;
 
 	struct {
+		void (*config_dpc)(struct isc_device *isc);
 		void (*config_csc)(struct isc_device *isc);
 		void (*config_cbc)(struct isc_device *isc);
 		void (*config_cc)(struct isc_device *isc);
diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
index 7ff8b362568d..2b53e9427353 100644
--- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
+++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
@@ -57,6 +57,7 @@
 void isc_sama5d2_config_csc(struct isc_device *isc);
 void isc_sama5d2_config_cbc(struct isc_device *isc);
 void isc_sama5d2_config_cc(struct isc_device *isc);
+void isc_sama5d2_config_dpc(struct isc_device *isc);
 
 void isc_sama5d2_config_ctrls(struct isc_device *isc,
 			      const struct v4l2_ctrl_ops *ops);
@@ -114,6 +115,11 @@ void isc_sama5d2_config_ctrls(struct isc_device *isc,
 	v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256);
 }
 
+void isc_sama5d2_config_dpc(struct isc_device *isc)
+{
+	/* This module is not present on sama5d2 pipeline */
+}
+
 /* Gamma table with gamma 1/2.2 */
 const u32 isc_sama5d2_gamma_table[][GAMMA_ENTRIES] = {
 	/* 0 --> gamma 1/1.8 */
@@ -259,6 +265,7 @@ static int atmel_isc_probe(struct platform_device *pdev)
 	isc->max_width = ISC_SAMA5D2_MAX_SUPPORT_WIDTH;
 	isc->max_height = ISC_SAMA5D2_MAX_SUPPORT_HEIGHT;
 
+	isc->config_dpc = isc_sama5d2_config_dpc;
 	isc->config_csc = isc_sama5d2_config_csc;
 	isc->config_cbc = isc_sama5d2_config_cbc;
 	isc->config_cc = isc_sama5d2_config_cc;
-- 
2.25.1