media: microchip: microchip-isc: prepare for media controller support

Prepare the support for media-controller.
This means that the capabilities of the driver have changed and now it's
capable of media controller operations.
The driver will register its media device, and add the video entity to this
media device. The subdevices are registered to the same media device.
The ISC will have a base entity which is auto-detected as
microchip_isc_base.
It will also register a subdevice that allows cropping of the incoming
frame to the maximum frame size supported by the ISC.
The ISC will create a link between the subdevice that is asynchronously
registered and the microchip_isc_scaler entity.
Then, the microchip_isc_scaler and microchip_isc_base are connected
through another link.
This patch does not change the previous capability of the driver, the
fact that the format is still being propagated from the top video node
down to the sensor.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/media/platform/microchip/microchip-isc.h b/drivers/media/platform/microchip/microchip-isc.h
index 32969a3f79c5..1ba951df4f15 100644
--- a/drivers/media/platform/microchip/microchip-isc.h
+++ b/drivers/media/platform/microchip/microchip-isc.h
@@ -183,6 +183,17 @@ struct isc_reg_offsets {
 	u32 his_entry;
 };
 
+enum isc_mc_pads {
+	ISC_PAD_SINK	= 0,
+	ISC_PADS_NUM	= 1,
+};
+
+enum isc_scaler_pads {
+	ISC_SCALER_PAD_SINK	= 0,
+	ISC_SCALER_PAD_SOURCE	= 1,
+	ISC_SCALER_PADS_NUM	= 2,
+};
+
 /*
  * struct isc_device - ISC device driver data/config struct
  * @regmap:		Register map
@@ -259,6 +270,12 @@ struct isc_reg_offsets {
  *			be used as an input to the controller
  * @controller_formats_size:	size of controller_formats array
  * @formats_list_size:	size of formats_list array
+ * @pads:		media controller pads for isc video entity
+ * @mdev:		media device that is registered by the isc
+ * @remote_pad:		remote pad on the connected subdevice
+ * @scaler_sd:		subdevice for the scaler that isc registers
+ * @scaler_pads:	media controller pads for the scaler subdevice
+ * @scaler_format:	current format for the scaler subdevice
  */
 struct isc_device {
 	struct regmap		*regmap;
@@ -348,6 +365,19 @@ struct isc_device {
 	struct isc_format		*formats_list;
 	u32				controller_formats_size;
 	u32				formats_list_size;
+
+	struct {
+		struct media_pad		pads[ISC_PADS_NUM];
+		struct media_device		mdev;
+
+		u32				remote_pad;
+	};
+
+	struct {
+		struct v4l2_subdev		scaler_sd;
+		struct media_pad		scaler_pads[ISC_SCALER_PADS_NUM];
+		struct v4l2_mbus_framefmt	scaler_format[ISC_SCALER_PADS_NUM];
+	};
 };
 
 extern const struct regmap_config microchip_isc_regmap_config;
@@ -359,4 +389,11 @@ int microchip_isc_clk_init(struct isc_device *isc);
 void microchip_isc_subdev_cleanup(struct isc_device *isc);
 void microchip_isc_clk_cleanup(struct isc_device *isc);
 
+int isc_scaler_link(struct isc_device *isc);
+int isc_scaler_init(struct isc_device *isc);
+int isc_mc_init(struct isc_device *isc, u32 ver);
+void isc_mc_cleanup(struct isc_device *isc);
+
+struct isc_format *isc_find_format_by_code(struct isc_device *isc,
+					   unsigned int code, int *index);
 #endif