diff options
| author | Paul Kocialkowski <paul.kocialkowski@bootlin.com> | 2022-11-03 16:37:16 +0000 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-11-25 07:23:53 +0000 |
| commit | 0fbbb09c024dc65ac2616967caf09d48778c20b4 (patch) | |
| tree | ce95cee15d0becf5b6dfdd9c0ec854b10923a0f6 /drivers/media/platform/sunxi | |
| parent | 24e6c88a07670e301758d3b131e6f1f2b093a8d1 (diff) | |
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: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media/platform/sunxi')
| -rw-r--r-- | drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 34 | ||||
| -rw-r--r-- | drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h | 3 |
2 files changed, 37 insertions, 0 deletions
diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c index 6d3508ae6e87..0513b7b0c2a0 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c @@ -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; diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h index e611bdd6e9b2..8e232cd91ebe 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h @@ -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 { |