[media] mt9v032: Provide link frequency control

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 43 insertions, 5 deletions

diff --git a/drivers/media/i2c/mt9v032.c b/drivers/media/i2c/mt9v032.c
index 2203a6f52e48..bf591b891a74 100644
--- a/drivers/media/i2c/mt9v032.c
+++ b/drivers/media/i2c/mt9v032.c
@@ -29,6 +29,8 @@
 #define MT9V032_PIXEL_ARRAY_HEIGHT                      492
 #define MT9V032_PIXEL_ARRAY_WIDTH                       782
 
+#define MT9V032_SYSCLK_FREQ_DEF                         26600000
+
 #define MT9V032_CHIP_VERSION                            0x00
 #define         MT9V032_CHIP_ID_REV1                    0x1311
 #define         MT9V032_CHIP_ID_REV3                    0x1313
@@ -122,13 +124,18 @@ struct mt9v032 {
         struct v4l2_mbus_framefmt format;
         struct v4l2_rect crop;
 
-        struct v4l2_ctrl *pixel_rate;
         struct v4l2_ctrl_handler ctrls;
+        struct {
+                struct v4l2_ctrl *link_freq;
+                struct v4l2_ctrl *pixel_rate;
+        };
 
         struct mutex power_lock;
         int power_count;
 
         struct mt9v032_platform_data *pdata;
+
+        u32 sysclk;
         u16 chip_control;
         u16 aec_agc;
 };
@@ -196,7 +203,7 @@ static int mt9v032_power_on(struct mt9v032 *mt9v032)
         int ret;
 
         if (mt9v032->pdata->set_clock) {
-                mt9v032->pdata->set_clock(&mt9v032->subdev, EXT_CLK);
+                mt9v032->pdata->set_clock(&mt9v032->subdev, mt9v032->sysclk);
                 udelay(1);
         }
 
@@ -374,7 +381,8 @@ static void mt9v032_configure_pixel_rate(struct mt9v032 *mt9v032,
         struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
         int ret;
 
-        ret = v4l2_ctrl_s_ctrl_int64(mt9v032->pixel_rate, EXT_CLK / hratio);
+        ret = v4l2_ctrl_s_ctrl_int64(mt9v032->pixel_rate,
+                                     mt9v032->sysclk / hratio);
         if (ret < 0)
                 dev_warn(&client->dev, "failed to set pixel rate (%d)\n", ret);
 }
@@ -487,6 +495,7 @@ static int mt9v032_s_ctrl(struct v4l2_ctrl *ctrl)
         struct mt9v032 *mt9v032 =
                         container_of(ctrl->handler, struct mt9v032, ctrls);
         struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
+        u32 freq;
         u16 data;
 
         switch (ctrl->id) {
@@ -505,6 +514,16 @@ static int mt9v032_s_ctrl(struct v4l2_ctrl *ctrl)
                 return mt9v032_write(client, MT9V032_TOTAL_SHUTTER_WIDTH,
                                      ctrl->val);
 
+        case V4L2_CID_PIXEL_RATE:
+        case V4L2_CID_LINK_FREQ:
+                if (mt9v032->link_freq == NULL)
+                        break;
+
+                freq = mt9v032->pdata->link_freqs[mt9v032->link_freq->val];
+                mt9v032->pixel_rate->val64 = freq;
+                mt9v032->sysclk = freq;
+                break;
+
         case V4L2_CID_TEST_PATTERN:
                 switch (ctrl->val) {
                 case 0:
@@ -683,6 +702,7 @@ static const struct v4l2_subdev_internal_ops mt9v032_subdev_internal_ops = {
 static int mt9v032_probe(struct i2c_client *client,
                 const struct i2c_device_id *did)
 {
+        struct mt9v032_platform_data *pdata = client->dev.platform_data;
         struct mt9v032 *mt9v032;
         unsigned int i;
         int ret;
@@ -699,9 +719,9 @@ static int mt9v032_probe(struct i2c_client *client,
                 return -ENOMEM;
 
         mutex_init(&mt9v032->power_lock);
-        mt9v032->pdata = client->dev.platform_data;
+        mt9v032->pdata = pdata;
 
-        v4l2_ctrl_handler_init(&mt9v032->ctrls, ARRAY_SIZE(mt9v032_ctrls) + 5);
+        v4l2_ctrl_handler_init(&mt9v032->ctrls, ARRAY_SIZE(mt9v032_ctrls) + 6);
 
         v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
                           V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
@@ -715,10 +735,27 @@ static int mt9v032_probe(struct i2c_client *client,
                           V4L2_CID_EXPOSURE, MT9V032_TOTAL_SHUTTER_WIDTH_MIN,
                           MT9V032_TOTAL_SHUTTER_WIDTH_MAX, 1,
                           MT9V032_TOTAL_SHUTTER_WIDTH_DEF);
+
         mt9v032->pixel_rate =
                 v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
                                   V4L2_CID_PIXEL_RATE, 0, 0, 1, 0);
 
+        if (pdata && pdata->link_freqs) {
+                unsigned int def = 0;
+
+                for (i = 0; pdata->link_freqs[i]; ++i) {
+                        if (pdata->link_freqs[i] == pdata->link_def_freq)
+                                def = i;
+                }
+
+                mt9v032->link_freq =
+                        v4l2_ctrl_new_int_menu(&mt9v032->ctrls,
+                                               &mt9v032_ctrl_ops,
+                                               V4L2_CID_LINK_FREQ, i - 1, def,
+                                               pdata->link_freqs);
+                v4l2_ctrl_cluster(2, &mt9v032->link_freq);
+        }
+
         for (i = 0; i < ARRAY_SIZE(mt9v032_ctrls); ++i)
                 v4l2_ctrl_new_custom(&mt9v032->ctrls, &mt9v032_ctrls[i], NULL);
 
@@ -740,6 +777,7 @@ static int mt9v032_probe(struct i2c_client *client,
         mt9v032->format.colorspace = V4L2_COLORSPACE_SRGB;
 
         mt9v032->aec_agc = MT9V032_AEC_ENABLE | MT9V032_AGC_ENABLE;
+        mt9v032->sysclk = MT9V032_SYSCLK_FREQ_DEF;
 
         v4l2_i2c_subdev_init(&mt9v032->subdev, client, &mt9v032_subdev_ops);
         mt9v032->subdev.internal_ops = &mt9v032_subdev_internal_ops;