From: Hans de Goede <hdegoede@redhat.com>
Date: Wed, 25 Apr 2012 15:17:19 +0000 (-0300)
Subject: [media] gspca_pac7311: Adjust control scales to match registers
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c894d26c5a89a241b10e2e8058ac12eb8f251252;p=openwrt%2Fstaging%2Fblogic.git

[media] gspca_pac7311: Adjust control scales to match registers

Now that the pac7302 and pac7311 drivers are split, they no longer
share there control settings, so there is no need to scale the controls
to register values, instead make them reflect the registers directly.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/video/gspca/pac7311.c b/drivers/media/video/gspca/pac7311.c
index d12576365038..4efa110e6932 100644
--- a/drivers/media/video/gspca/pac7311.c
+++ b/drivers/media/video/gspca/pac7311.c
@@ -92,10 +92,10 @@ static const struct ctrl sd_ctrls[] = {
 		.type    = V4L2_CTRL_TYPE_INTEGER,
 		.name    = "Contrast",
 		.minimum = 0,
-#define CONTRAST_MAX 255
+#define CONTRAST_MAX 15
 		.maximum = CONTRAST_MAX,
 		.step    = 1,
-#define CONTRAST_DEF 127
+#define CONTRAST_DEF 7
 		.default_value = CONTRAST_DEF,
 	    },
 	    .set = sd_setcontrast,
@@ -107,11 +107,11 @@ static const struct ctrl sd_ctrls[] = {
 		.type    = V4L2_CTRL_TYPE_INTEGER,
 		.name    = "Gain",
 		.minimum = 0,
-#define GAIN_MAX 255
+#define GAIN_MAX 244
 		.maximum = GAIN_MAX,
 		.step    = 1,
-#define GAIN_DEF 127
-#define GAIN_KNEE 255 /* Gain seems to cause little noise on the pac73xx */
+#define GAIN_DEF 122
+#define GAIN_KNEE GAIN_MAX /* Gain seems to cause little noise on the 7311 */
 		.default_value = GAIN_DEF,
 	    },
 	    .set = sd_setgain,
@@ -122,12 +122,12 @@ static const struct ctrl sd_ctrls[] = {
 		.id      = V4L2_CID_EXPOSURE,
 		.type    = V4L2_CTRL_TYPE_INTEGER,
 		.name    = "Exposure",
-		.minimum = 0,
-#define EXPOSURE_MAX 255
+		.minimum = 2,
+#define EXPOSURE_MAX 63
 		.maximum = EXPOSURE_MAX,
 		.step    = 1,
-#define EXPOSURE_DEF  16 /*  32 ms / 30 fps */
-#define EXPOSURE_KNEE 50 /* 100 ms / 10 fps */
+#define EXPOSURE_DEF  2 /* 30 fps */
+#define EXPOSURE_KNEE 6 /* 10 fps */
 		.default_value = EXPOSURE_DEF,
 	    },
 	    .set = sd_setexposure,
@@ -400,7 +400,7 @@ static void setcontrast(struct gspca_dev *gspca_dev)
 	struct sd *sd = (struct sd *) gspca_dev;
 
 	reg_w(gspca_dev, 0xff, 0x04);
-	reg_w(gspca_dev, 0x10, sd->contrast >> 4);
+	reg_w(gspca_dev, 0x10, sd->contrast);
 	/* load registers to sensor (Bit 0, auto clear) */
 	reg_w(gspca_dev, 0x11, 0x01);
 }
@@ -408,15 +408,10 @@ static void setcontrast(struct gspca_dev *gspca_dev)
 static void setgain(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
-	int gain = GAIN_MAX - sd->gain;
 
-	if (gain < 1)
-		gain = 1;
-	else if (gain > 245)
-		gain = 245;
 	reg_w(gspca_dev, 0xff, 0x04);			/* page 4 */
 	reg_w(gspca_dev, 0x0e, 0x00);
-	reg_w(gspca_dev, 0x0f, gain);
+	reg_w(gspca_dev, 0x0f, GAIN_MAX - sd->gain + 1);
 
 	/* load registers to sensor (Bit 0, auto clear) */
 	reg_w(gspca_dev, 0x11, 0x01);
@@ -425,19 +420,9 @@ static void setgain(struct gspca_dev *gspca_dev)
 static void setexposure(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
-	__u8 reg;
-
-	/* register 2 of page 4 contains the clock divider configuring the
-	   no fps according to the formula: 60 / reg. sd->exposure is the
-	   desired exposure time in ms. */
-	reg = 120 * sd->exposure / 1000;
-	if (reg < 2)
-		reg = 2;
-	else if (reg > 63)
-		reg = 63;
 
 	reg_w(gspca_dev, 0xff, 0x04);			/* page 4 */
-	reg_w(gspca_dev, 0x02, reg);
+	reg_w(gspca_dev, 0x02, sd->exposure);
 
 	/* load registers to sensor (Bit 0, auto clear) */
 	reg_w(gspca_dev, 0x11, 0x01);
@@ -446,7 +431,7 @@ static void setexposure(struct gspca_dev *gspca_dev)
 	   640x480 mode and page 4 reg 2 <= 3 then it must be 9 */
 	reg_w(gspca_dev, 0xff, 0x01);
 	if (gspca_dev->cam.cam_mode[(int)gspca_dev->curr_mode].priv &&
-			reg <= 3) {
+			sd->exposure <= 3) {
 		reg_w(gspca_dev, 0x08, 0x09);
 	} else {
 		reg_w(gspca_dev, 0x08, 0x08);