Commit 0fbbb09c authored by Paul Kocialkowski's avatar Paul Kocialkowski Committed by Mauro Carvalho Chehab
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media: sun6i-csi: Detect the availability of the ISP 



Add a helper to detect whether the ISP is available and connected
and store the indication in the driver-specific device structure.

Signed-off-by: default avatarPaul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent 24e6c88a

drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c

+34 −0
Original line number Diff line number Diff line
@@ -24,6 +24,36 @@ 
#include "sun6i_csi_capture.h"

#include "sun6i_csi_reg.h"



/* ISP */



static int sun6i_csi_isp_detect(struct sun6i_csi_device *csi_dev)

{

	struct device *dev = csi_dev->dev;

	struct fwnode_handle *handle;



	/*

	 * ISP is not available if not connected via fwnode graph.

	 * This will also check that the remote parent node is available.

	 */

	handle = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev),

						 SUN6I_CSI_PORT_ISP, 0,

						 FWNODE_GRAPH_ENDPOINT_NEXT);

	if (!handle)

		return 0;



	fwnode_handle_put(handle);



	if (!IS_ENABLED(CONFIG_VIDEO_SUN6I_ISP)) {

		dev_warn(dev,

			 "ISP link is detected but not enabled in kernel config!");

		return 0;

	}



	csi_dev->isp_available = true;



	return 0;

}



/* Media */



static const struct media_device_ops sun6i_csi_media_ops = {
@@ -289,6 +319,10 @@ static int sun6i_csi_probe(struct platform_device *platform_dev) 
	if (ret)

		return ret;



	ret = sun6i_csi_isp_detect(csi_dev);

	if (ret)

		goto error_resources;



	ret = sun6i_csi_v4l2_setup(csi_dev);

	if (ret)

		goto error_resources;

drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h

+3 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
enum sun6i_csi_port {

	SUN6I_CSI_PORT_PARALLEL		= 0,

	SUN6I_CSI_PORT_MIPI_CSI2	= 1,

	SUN6I_CSI_PORT_ISP		= 2,

};



struct sun6i_csi_buffer {
@@ -44,6 +45,8 @@ struct sun6i_csi_device { 
	struct clk			*clock_mod;

	struct clk			*clock_ram;

	struct reset_control		*reset;



	bool				isp_available;

};



struct sun6i_csi_variant {