diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0807-media-bcm2835-unicam-Add-support-for-get_mbus_config.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0807-media-bcm2835-unicam-Add-support-for-get_mbus_config.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0807-media-bcm2835-unicam-Add-support-for-get_mbus_config.patch b/target/linux/bcm27xx/patches-5.4/950-0807-media-bcm2835-unicam-Add-support-for-get_mbus_config.patch new file mode 100644 index 0000000000..8e3cef06d4 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0807-media-bcm2835-unicam-Add-support-for-get_mbus_config.patch @@ -0,0 +1,56 @@ +From f1ab20a9584c97eddf07d4f8937f0aff42bd1038 Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Tue, 23 Jun 2020 14:32:51 +0100 +Subject: [PATCH] media: bcm2835-unicam: Add support for + get_mbus_config to set num lanes + +Use the get_mbus_config pad subdev call to allow a source to use +fewer than the number of CSI2 lanes defined in device tree. + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> +--- + .../media/platform/bcm2835/bcm2835-unicam.c | 31 ++++++++++++++++--- + 1 file changed, 27 insertions(+), 4 deletions(-) + +--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c ++++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c +@@ -1639,12 +1639,35 @@ static int unicam_start_streaming(struct + goto err_streaming; + } + +- /* +- * TODO: Retrieve the number of active data lanes from the connected +- * subdevice. +- */ + dev->active_data_lanes = dev->max_data_lanes; + ++ if (dev->bus_type == V4L2_MBUS_CSI2_DPHY) { ++ struct v4l2_mbus_config mbus_config = { 0 }; ++ ++ ret = v4l2_subdev_call(dev->sensor, pad, get_mbus_config, ++ 0, &mbus_config); ++ if (ret < 0 && ret != -ENOIOCTLCMD) { ++ unicam_dbg(3, dev, "g_mbus_config failed\n"); ++ goto err_pm_put; ++ } ++ ++ dev->active_data_lanes = ++ (mbus_config.flags & V4L2_MBUS_CSI2_LANE_MASK) >> ++ __ffs(V4L2_MBUS_CSI2_LANE_MASK); ++ if (!dev->active_data_lanes) ++ dev->active_data_lanes = dev->max_data_lanes; ++ if (dev->active_data_lanes > dev->max_data_lanes) { ++ unicam_err(dev, "Device has requested %u data lanes, which is >%u configured in DT\n", ++ dev->active_data_lanes, ++ dev->max_data_lanes); ++ ret = -EINVAL; ++ goto err_pm_put; ++ } ++ } ++ ++ unicam_dbg(1, dev, "Running with %u data lanes\n", ++ dev->active_data_lanes); ++ + ret = clk_set_rate(dev->clock, 100 * 1000 * 1000); + if (ret) { + unicam_err(dev, "failed to set up clock\n"); |