media: atomisp: gc0310: Add selection API support

Add support for the selection API as expected by libcamera.

Note the driver only supports a single fixed resolution and
no cropping, so this is a simple read-only implementation.

Signed-off-by: Hans de Goede <hansg@kernel.org>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20250517114106.43494-7-hdegoede@redhat.com
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c
index 1f1795fc625ffe1e6d2ac14512835f608347e816..15ca7bc82322fb6e1e7eb0866c881f0dbf12453f 100644 (file)
--- a/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c
+++ b/drivers/staging/media/atomisp/i2c/atomisp-gc0310.c
@@ -3,7 +3,7 @@
  * Support for GalaxyCore GC0310 VGA camera sensor.
  *
  * Copyright (c) 2013 Intel Corporation. All Rights Reserved.
- * Copyright (c) 2023 Hans de Goede <hdegoede@redhat.com>
+ * Copyright (c) 2023-2025 Hans de Goede <hansg@kernel.org>
  */
 
 #include <linux/delay.h>
@@ -352,6 +352,28 @@ static int gc0310_get_fmt(struct v4l2_subdev *sd,
        return 0;
 }
 
+static int gc0310_get_selection(struct v4l2_subdev *sd,
+                               struct v4l2_subdev_state *state,
+                               struct v4l2_subdev_selection *sel)
+{
+       /* Only the single fixed 656x496 mode is supported, without croping */
+       switch (sel->target) {
+       case V4L2_SEL_TGT_CROP:
+       case V4L2_SEL_TGT_CROP_BOUNDS:
+       case V4L2_SEL_TGT_CROP_DEFAULT:
+       case V4L2_SEL_TGT_NATIVE_SIZE:
+               sel->r.top = 0;
+               sel->r.left = 0;
+               sel->r.width = GC0310_NATIVE_WIDTH;
+               sel->r.height = GC0310_NATIVE_HEIGHT;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
 static int gc0310_detect(struct gc0310_device *sensor)
 {
        struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
@@ -509,6 +531,8 @@ static const struct v4l2_subdev_pad_ops gc0310_pad_ops = {
        .enum_frame_size = gc0310_enum_frame_size,
        .get_fmt = gc0310_get_fmt,
        .set_fmt = gc0310_set_fmt,
+       .get_selection = gc0310_get_selection,
+       .set_selection = gc0310_get_selection,
        .get_frame_interval = gc0310_get_frame_interval,
 };
 
@@ -671,5 +695,6 @@ static struct i2c_driver gc0310_driver = {
 module_i2c_driver(gc0310_driver);
 
 MODULE_AUTHOR("Lai, Angie <angie.lai@intel.com>");
+MODULE_AUTHOR("Hans de Goede <hansg@kernel.org>");
 MODULE_DESCRIPTION("A low-level driver for GalaxyCore GC0310 sensors");
 MODULE_LICENSE("GPL");