[media] smiapp: Implement the test pattern control

Add support for the V4L2_CID_TEST_PATTERN control. When the solid colour
mode is selected, additional controls become available for setting the
solid four solid colour components.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c
index 1eaf975..437ec29 100644 (file)
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -31,8 +31,9 @@
 #include <linux/device.h>
 #include <linux/gpio.h>
 #include <linux/module.h>
-#include <linux/slab.h>
 #include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/smiapp.h>
 #include <linux/v4l2-mediabus.h>
 #include <media/v4l2-device.h>
 
@@ -404,6 +405,14 @@ static void smiapp_update_mbus_formats(struct smiapp_sensor *sensor)
                pixel_order_str[pixel_order]);
 }
 
+static const char * const smiapp_test_patterns[] = {
+       "Disabled",
+       "Solid Colour",
+       "Eight Vertical Colour Bars",
+       "Colour Bars With Fade to Grey",
+       "Pseudorandom Sequence (PN9)",
+};
+
 static int smiapp_set_ctrl(struct v4l2_ctrl *ctrl)
 {
        struct smiapp_sensor *sensor =
@@ -477,6 +486,35 @@ static int smiapp_set_ctrl(struct v4l2_ctrl *ctrl)
 
                return smiapp_pll_update(sensor);
 
+       case V4L2_CID_TEST_PATTERN: {
+               unsigned int i;
+
+               for (i = 0; i < ARRAY_SIZE(sensor->test_data); i++)
+                       v4l2_ctrl_activate(
+                               sensor->test_data[i],
+                               ctrl->val ==
+                               V4L2_SMIAPP_TEST_PATTERN_MODE_SOLID_COLOUR);
+
+               return smiapp_write(
+                       sensor, SMIAPP_REG_U16_TEST_PATTERN_MODE, ctrl->val);
+       }
+
+       case V4L2_CID_TEST_PATTERN_RED:
+               return smiapp_write(
+                       sensor, SMIAPP_REG_U16_TEST_DATA_RED, ctrl->val);
+
+       case V4L2_CID_TEST_PATTERN_GREENR:
+               return smiapp_write(
+                       sensor, SMIAPP_REG_U16_TEST_DATA_GREENR, ctrl->val);
+
+       case V4L2_CID_TEST_PATTERN_BLUE:
+               return smiapp_write(
+                       sensor, SMIAPP_REG_U16_TEST_DATA_BLUE, ctrl->val);
+
+       case V4L2_CID_TEST_PATTERN_GREENB:
+               return smiapp_write(
+                       sensor, SMIAPP_REG_U16_TEST_DATA_GREENB, ctrl->val);
+
        default:
                return -EINVAL;
        }
@@ -489,10 +527,10 @@ static const struct v4l2_ctrl_ops smiapp_ctrl_ops = {
 static int smiapp_init_controls(struct smiapp_sensor *sensor)
 {
        struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
-       unsigned int max;
+       unsigned int max, i;
        int rval;
 
-       rval = v4l2_ctrl_handler_init(&sensor->pixel_array->ctrl_handler, 7);
+       rval = v4l2_ctrl_handler_init(&sensor->pixel_array->ctrl_handler, 12);
        if (rval)
                return rval;
        sensor->pixel_array->ctrl_handler.lock = &sensor->mutex;
@@ -535,6 +573,20 @@ static int smiapp_init_controls(struct smiapp_sensor *sensor)
                &sensor->pixel_array->ctrl_handler, &smiapp_ctrl_ops,
                V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, 1);
 
+       v4l2_ctrl_new_std_menu_items(&sensor->pixel_array->ctrl_handler,
+                                    &smiapp_ctrl_ops, V4L2_CID_TEST_PATTERN,
+                                    ARRAY_SIZE(smiapp_test_patterns) - 1,
+                                    0, 0, smiapp_test_patterns);
+
+       for (i = 0; i < ARRAY_SIZE(sensor->test_data); i++) {
+               int max_value = (1 << sensor->csi_format->width) - 1;
+               sensor->test_data[i] =
+                       v4l2_ctrl_new_std(
+                               &sensor->pixel_array->ctrl_handler,
+                               &smiapp_ctrl_ops, V4L2_CID_TEST_PATTERN_RED + i,
+                               0, max_value, 1, max_value);
+       }
+
        if (sensor->pixel_array->ctrl_handler.error) {
                dev_err(&client->dev,
                        "pixel array controls initialization failed (%d)\n",
@@ -1671,17 +1723,34 @@ static int smiapp_set_format(struct v4l2_subdev *subdev,
        if (fmt->pad == ssd->source_pad) {
                u32 code = fmt->format.code;
                int rval = __smiapp_get_format(subdev, fh, fmt);
+               bool range_changed = false;
+               unsigned int i;
 
                if (!rval && subdev == &sensor->src->sd) {
                        const struct smiapp_csi_data_format *csi_format =
                                smiapp_validate_csi_data_format(sensor, code);
-                       if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+
+                       if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+                               if (csi_format->width !=
+                                   sensor->csi_format->width)
+                                       range_changed = true;
+
                                sensor->csi_format = csi_format;
+                       }
+
                        fmt->format.code = csi_format->code;
                }
 
                mutex_unlock(&sensor->mutex);
-               return rval;
+               if (rval || !range_changed)
+                       return rval;
+
+               for (i = 0; i < ARRAY_SIZE(sensor->test_data); i++)
+                       v4l2_ctrl_modify_range(
+                               sensor->test_data[i],
+                               0, (1 << sensor->csi_format->width) - 1, 1, 0);
+
+               return 0;
        }
 
        /* Sink pad. Width and height are changeable here. */

diff --git a/drivers/media/i2c/smiapp/smiapp.h b/drivers/media/i2c/smiapp/smiapp.h
index 7cc5aae..874b49f 100644 (file)
--- a/drivers/media/i2c/smiapp/smiapp.h
+++ b/drivers/media/i2c/smiapp/smiapp.h
@@ -54,6 +54,8 @@
        (1000 + (SMIAPP_RESET_DELAY_CLOCKS * 1000       \
                 + (clk) / 1000 - 1) / ((clk) / 1000))
 
+#define SMIAPP_COLOUR_COMPONENTS       4
+
 #include "smiapp-limits.h"
 
 struct smiapp_quirk;
@@ -241,6 +243,8 @@ struct smiapp_sensor {
        /* src controls */
        struct v4l2_ctrl *link_freq;
        struct v4l2_ctrl *pixel_rate_csi;
+       /* test pattern colour components */
+       struct v4l2_ctrl *test_data[SMIAPP_COLOUR_COMPONENTS];
 };
 
 #define to_smiapp_subdev(_sd)                          \