1 files changed, 122 insertions, 79 deletions

diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index a70a6ff7b36e..a7d26b294eb5 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -160,10 +160,10 @@ MODULE_PARM_DESC(debug, "Debug level (0-1)");
 #define REG_GFIX	0x69	/* Fix gain control */
 
 #define REG_DBLV	0x6b	/* PLL control an debugging */
-#define   DBLV_BYPASS	  0x00	  /* Bypass PLL */
-#define   DBLV_X4	  0x01	  /* clock x4 */
-#define   DBLV_X6	  0x10	  /* clock x6 */
-#define   DBLV_X8	  0x11	  /* clock x8 */
+#define   DBLV_BYPASS	  0x0a	  /* Bypass PLL */
+#define   DBLV_X4	  0x4a	  /* clock x4 */
+#define   DBLV_X6	  0x8a	  /* clock x6 */
+#define   DBLV_X8	  0xca	  /* clock x8 */
 
 #define REG_SCALING_XSC	0x70	/* Test pattern and horizontal scale factor */
 #define   TEST_PATTTERN_0 0x80
@@ -241,7 +241,9 @@ struct ov7670_info {
 	};
 	struct v4l2_mbus_framefmt format;
 	struct ov7670_format_struct *fmt;  /* Current format */
+	struct ov7670_win_size *wsize;
 	struct clk *clk;
+	int on;
 	struct gpio_desc *resetb_gpio;
 	struct gpio_desc *pwdn_gpio;
 	unsigned int mbus_config;	/* Media bus configuration flags */
@@ -810,13 +812,25 @@ static void ov7675_get_framerate(struct v4l2_subdev *sd,
 			(4 * clkrc);
 }
 
+static int ov7675_apply_framerate(struct v4l2_subdev *sd)
+{
+	struct ov7670_info *info = to_state(sd);
+	int ret;
+
+	ret = ov7670_write(sd, REG_CLKRC, info->clkrc);
+	if (ret < 0)
+		return ret;
+
+	return ov7670_write(sd, REG_DBLV,
+			    info->pll_bypass ? DBLV_BYPASS : DBLV_X4);
+}
+
 static int ov7675_set_framerate(struct v4l2_subdev *sd,
 				 struct v4l2_fract *tpf)
 {
 	struct ov7670_info *info = to_state(sd);
 	u32 clkrc;
 	int pll_factor;
-	int ret;
 
 	/*
 	 * The formula is fps = 5/4*pixclk for YUV/RGB and
@@ -825,19 +839,10 @@ static int ov7675_set_framerate(struct v4l2_subdev *sd,
 	 * pixclk = clock_speed / (clkrc + 1) * PLLfactor
 	 *
 	 */
-	if (info->pll_bypass) {
-		pll_factor = 1;
-		ret = ov7670_write(sd, REG_DBLV, DBLV_BYPASS);
-	} else {
-		pll_factor = PLL_FACTOR;
-		ret = ov7670_write(sd, REG_DBLV, DBLV_X4);
-	}
-	if (ret < 0)
-		return ret;
-
 	if (tpf->numerator == 0 || tpf->denominator == 0) {
 		clkrc = 0;
 	} else {
+		pll_factor = info->pll_bypass ? 1 : PLL_FACTOR;
 		clkrc = (5 * pll_factor * info->clock_speed * tpf->numerator) /
 			(4 * tpf->denominator);
 		if (info->fmt->mbus_code == MEDIA_BUS_FMT_SBGGR8_1X8)
@@ -859,11 +864,7 @@ static int ov7675_set_framerate(struct v4l2_subdev *sd,
 	/* Recalculate frame rate */
 	ov7675_get_framerate(sd, tpf);
 
-	ret = ov7670_write(sd, REG_CLKRC, info->clkrc);
-	if (ret < 0)
-		return ret;
-
-	return ov7670_write(sd, REG_DBLV, DBLV_X4);
+	return ov7675_apply_framerate(sd);
 }
 
 static void ov7670_get_framerate_legacy(struct v4l2_subdev *sd,
@@ -1004,48 +1005,20 @@ static int ov7670_try_fmt_internal(struct v4l2_subdev *sd,
 	return 0;
 }
 
-/*
- * Set a format.
- */
-static int ov7670_set_fmt(struct v4l2_subdev *sd,
-		struct v4l2_subdev_pad_config *cfg,
-		struct v4l2_subdev_format *format)
+static int ov7670_apply_fmt(struct v4l2_subdev *sd)
 {
-	struct ov7670_format_struct *ovfmt;
-	struct ov7670_win_size *wsize;
 	struct ov7670_info *info = to_state(sd);
-#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
-	struct v4l2_mbus_framefmt *mbus_fmt;
-#endif
+	struct ov7670_win_size *wsize = info->wsize;
 	unsigned char com7, com10 = 0;
 	int ret;
 
-	if (format->pad)
-		return -EINVAL;
-
-	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
-		ret = ov7670_try_fmt_internal(sd, &format->format, NULL, NULL);
-		if (ret)
-			return ret;
-#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
-		mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
-		*mbus_fmt = format->format;
-		return 0;
-#else
-		return -ENOTTY;
-#endif
-	}
-
-	ret = ov7670_try_fmt_internal(sd, &format->format, &ovfmt, &wsize);
-	if (ret)
-		return ret;
 	/*
 	 * COM7 is a pain in the ass, it doesn't like to be read then
 	 * quickly written afterward.  But we have everything we need
 	 * to set it absolutely here, as long as the format-specific
 	 * register sets list it first.
 	 */
-	com7 = ovfmt->regs[0].value;
+	com7 = info->fmt->regs[0].value;
 	com7 |= wsize->com7_bit;
 	ret = ov7670_write(sd, REG_COM7, com7);
 	if (ret)
@@ -1067,7 +1040,7 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd,
 	/*
 	 * Now write the rest of the array.  Also store start/stops
 	 */
-	ret = ov7670_write_array(sd, ovfmt->regs + 1);
+	ret = ov7670_write_array(sd, info->fmt->regs + 1);
 	if (ret)
 		return ret;
 
@@ -1082,8 +1055,6 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd,
 			return ret;
 	}
 
-	info->fmt = ovfmt;
-
 	/*
 	 * If we're running RGB565, we must rewrite clkrc after setting
 	 * the other parameters or the image looks poor.  If we're *not*
@@ -1101,6 +1072,46 @@ static int ov7670_set_fmt(struct v4l2_subdev *sd,
 	return 0;
 }
 
+/*
+ * Set a format.
+ */
+static int ov7670_set_fmt(struct v4l2_subdev *sd,
+		struct v4l2_subdev_pad_config *cfg,
+		struct v4l2_subdev_format *format)
+{
+	struct ov7670_info *info = to_state(sd);
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+	struct v4l2_mbus_framefmt *mbus_fmt;
+#endif
+	int ret;
+
+	if (format->pad)
+		return -EINVAL;
+
+	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
+		ret = ov7670_try_fmt_internal(sd, &format->format, NULL, NULL);
+		if (ret)
+			return ret;
+#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
+		mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
+		*mbus_fmt = format->format;
+		return 0;
+#else
+		return -ENOTTY;
+#endif
+	}
+
+	ret = ov7670_try_fmt_internal(sd, &format->format, &info->fmt, &info->wsize);
+	if (ret)
+		return ret;
+
+	ret = ov7670_apply_fmt(sd);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 static int ov7670_get_fmt(struct v4l2_subdev *sd,
 			  struct v4l2_subdev_pad_config *cfg,
 			  struct v4l2_subdev_format *format)
@@ -1607,17 +1618,57 @@ static int ov7670_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_regis
 }
 #endif
 
-static int ov7670_s_power(struct v4l2_subdev *sd, int on)
+static void ov7670_power_on(struct v4l2_subdev *sd)
 {
 	struct ov7670_info *info = to_state(sd);
 
+	if (info->on)
+		return;
+
+	clk_prepare_enable(info->clk);
+
 	if (info->pwdn_gpio)
-		gpiod_set_value(info->pwdn_gpio, !on);
-	if (on && info->resetb_gpio) {
+		gpiod_set_value(info->pwdn_gpio, 0);
+	if (info->resetb_gpio) {
 		gpiod_set_value(info->resetb_gpio, 1);
 		usleep_range(500, 1000);
 		gpiod_set_value(info->resetb_gpio, 0);
+	}
+	if (info->pwdn_gpio || info->resetb_gpio || info->clk)
 		usleep_range(3000, 5000);
+
+	info->on = true;
+}
+
+static void ov7670_power_off(struct v4l2_subdev *sd)
+{
+	struct ov7670_info *info = to_state(sd);
+
+	if (!info->on)
+		return;
+
+	clk_disable_unprepare(info->clk);
+
+	if (info->pwdn_gpio)
+		gpiod_set_value(info->pwdn_gpio, 1);
+
+	info->on = false;
+}
+
+static int ov7670_s_power(struct v4l2_subdev *sd, int on)
+{
+	struct ov7670_info *info = to_state(sd);
+
+	if (info->on == on)
+		return 0;
+
+	if (on) {
+		ov7670_power_on (sd);
+		ov7670_apply_fmt(sd);
+		ov7675_apply_framerate(sd);
+		v4l2_ctrl_handler_setup(&info->hdl);
+	} else {
+		ov7670_power_off (sd);
 	}
 
 	return 0;
@@ -1652,6 +1703,7 @@ static int ov7670_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 static const struct v4l2_subdev_core_ops ov7670_core_ops = {
 	.reset = ov7670_reset,
 	.init = ov7670_init,
+	.s_power = ov7670_s_power,
 	.log_status = v4l2_ctrl_subdev_log_status,
 	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
 	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
@@ -1801,11 +1853,7 @@ static int ov7670_probe(struct i2c_client *client,
 		if (config->clock_speed)
 			info->clock_speed = config->clock_speed;
 
-		/*
-		 * It should be allowed for ov7670 too when it is migrated to
-		 * the new frame rate formula.
-		 */
-		if (config->pll_bypass && id->driver_data != MODEL_OV7670)
+		if (config->pll_bypass)
 			info->pll_bypass = true;
 
 		if (config->pclk_hb_disable)
@@ -1820,24 +1868,21 @@ static int ov7670_probe(struct i2c_client *client,
 		else
 			return ret;
 	}
-	if (info->clk) {
-		ret = clk_prepare_enable(info->clk);
-		if (ret)
-			return ret;
 
+	ret = ov7670_init_gpio(client, info);
+	if (ret)
+		return ret;
+
+	ov7670_power_on(sd);
+
+	if (info->clk) {
 		info->clock_speed = clk_get_rate(info->clk) / 1000000;
 		if (info->clock_speed < 10 || info->clock_speed > 48) {
 			ret = -EINVAL;
-			goto clk_disable;
+			goto power_off;
 		}
 	}
 
-	ret = ov7670_init_gpio(client, info);
-	if (ret)
-		goto clk_disable;
-
-	ov7670_s_power(sd, 1);
-
 	/* Make sure it's an ov7670 */
 	ret = ov7670_detect(sd);
 	if (ret) {
@@ -1851,6 +1896,7 @@ static int ov7670_probe(struct i2c_client *client,
 
 	info->devtype = &ov7670_devdata[id->driver_data];
 	info->fmt = &ov7670_formats[0];
+	info->wsize = &info->devtype->win_sizes[0];
 
 	ov7670_get_default_format(sd, &info->format);
 
@@ -1916,6 +1962,7 @@ static int ov7670_probe(struct i2c_client *client,
 	if (ret < 0)
 		goto entity_cleanup;
 
+	ov7670_power_off(sd);
 	return 0;
 
 entity_cleanup:
@@ -1923,13 +1970,10 @@ entity_cleanup:
 hdl_free:
 	v4l2_ctrl_handler_free(&info->hdl);
 power_off:
-	ov7670_s_power(sd, 0);
-clk_disable:
-	clk_disable_unprepare(info->clk);
+	ov7670_power_off(sd);
 	return ret;
 }
 
-
 static int ov7670_remove(struct i2c_client *client)
 {
 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
@@ -1937,9 +1981,8 @@ static int ov7670_remove(struct i2c_client *client)
 
 	v4l2_async_unregister_subdev(sd);
 	v4l2_ctrl_handler_free(&info->hdl);
-	clk_disable_unprepare(info->clk);
 	media_entity_cleanup(&info->sd.entity);
-	ov7670_s_power(sd, 0);
+	ov7670_power_off(sd);
 	return 0;
 }