drivers: camera: add ioctl for mipi bias pad

Add support for the user to read mipi bias pad config
registers.

Jira CRTC-1436

Change-Id: I6e5cc5865d226e31f10c7b0c3bc4d0ce78e91d26
Signed-off-by: David Bang <dbang@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1577309
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bhanu Murthy V <bmurthyv@nvidia.com>
Reviewed-by: Josh Kergan <jkergan@nvidia.com>
Reviewed-by: Jihoon Bang <jbang@nvidia.com>

2 files changed, 26 insertions, 0 deletions

diff --git a/drivers/media/platform/tegra/mipical/mipi_cal.c b/drivers/media/platform/tegra/mipical/mipi_cal.c
index fb82f27c7..d848622c0 100644
--- a/drivers/media/platform/tegra/mipical/mipi_cal.c
+++ b/drivers/media/platform/tegra/mipical/mipi_cal.c
@@ -776,6 +776,30 @@ static long mipi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
                 }
                 return 0;
         }
+        case _IOC_NR(TEGRA_MIPI_IOCTL_BIAS_PAD_CFG0): {
+                u32 bias_pad_config0 = 0;
+
+                regmap_read(mipi->regmap, ADDR(MIPI_BIAS_PAD_CFG0),
+                                                &bias_pad_config0);
+                if (copy_to_user((void __user *)arg, &bias_pad_config0,
+                                                        sizeof(u32))) {
+                        dev_err(mipi->dev, "Fail to copy kernel data to user\n");
+                        return -EFAULT;
+                }
+                return 0;
+        }
+        case _IOC_NR(TEGRA_MIPI_IOCTL_BIAS_PAD_CFG2): {
+                u32 bias_pad_config2 = 0;
+
+                regmap_read(mipi->regmap, ADDR(MIPI_BIAS_PAD_CFG2),
+                                                &bias_pad_config2);
+                if (copy_to_user((void __user *)arg, &bias_pad_config2,
+                                                        sizeof(u32))) {
+                        dev_err(mipi->dev, "Fail to copy kernel data to user\n");
+                        return -EFAULT;
+                }
+                return 0;
+        }
         default:
                 dev_err(mipi->dev, "Unknown ioctl\n");
                 return -EINVAL;
diff --git a/include/uapi/misc/tegra_mipi_ioctl.h b/include/uapi/misc/tegra_mipi_ioctl.h
index 3c188b54a..145ebf7fa 100644
--- a/include/uapi/misc/tegra_mipi_ioctl.h
+++ b/include/uapi/misc/tegra_mipi_ioctl.h
@@ -22,5 +22,7 @@
 #define TEGRA_MIPI_IOCTL_BIAS_PAD_CTRL _IOW(TEGRA_MIPI_IOCTL_MAGIC, 1, u32)
 #define TEGRA_MIPI_IOCTL_CAL _IOW(TEGRA_MIPI_IOCTL_MAGIC, 2, u32)
 #define TEGRA_MIPI_IOCTL_CAL_STATUS _IOR(TEGRA_MIPI_IOCTL_MAGIC, 3, __u32)
+#define TEGRA_MIPI_IOCTL_BIAS_PAD_CFG0 _IOR(TEGRA_MIPI_IOCTL_MAGIC, 4, __u32)
+#define TEGRA_MIPI_IOCTL_BIAS_PAD_CFG2 _IOR(TEGRA_MIPI_IOCTL_MAGIC, 5, __u32)
 
 #endif