Rearrange the imx274_start_<N> register tables to better match the
datasheet and slightly simplify code:
- collapes tables 1 and 2, they are applied one after each other and
together they implement the fixed part 1 of the startup procedure
in the datasheet
- while there, cleanup comments
- rename tables 3 and 4 -> 2 and 3, coherently with the datasheet
Signed-off-by: Luca Ceresoli <luca@xxxxxxxxxxxxxxxx>
---
drivers/media/i2c/imx274.c | 36 +++++++++++++-----------------------
1 file changed, 13 insertions(+), 23 deletions(-)
diff --git a/drivers/media/i2c/imx274.c b/drivers/media/i2c/imx274.c
index 4f629e4e53fd..9b524de08470 100644
--- a/drivers/media/i2c/imx274.c
+++ b/drivers/media/i2c/imx274.c
@@ -349,20 +349,14 @@ static const struct reg_8 imx274_mode5_1280x720_raw10[] = {
*/
static const struct reg_8 imx274_start_1[] = {
{IMX274_STANDBY_REG, 0x12},
- {IMX274_TABLE_END, 0x00}
-};
-/*
- * imx274 second step register configuration for
- * starting stream
- */
-static const struct reg_8 imx274_start_2[] = {
- {0x3120, 0xF0}, /* clock settings */
- {0x3121, 0x00}, /* clock settings */
- {0x3122, 0x02}, /* clock settings */
- {0x3129, 0x9C}, /* clock settings */
- {0x312A, 0x02}, /* clock settings */
- {0x312D, 0x02}, /* clock settings */
+ /* PLRD: clock settings */
+ {0x3120, 0xF0},
+ {0x3121, 0x00},
+ {0x3122, 0x02},
+ {0x3129, 0x9C},
+ {0x312A, 0x02},
+ {0x312D, 0x02},
{0x310B, 0x00},
@@ -407,20 +401,20 @@ static const struct reg_8 imx274_start_2[] = {
};
/*
- * imx274 third step register configuration for
+ * imx274 second step register configuration for
* starting stream
*/
-static const struct reg_8 imx274_start_3[] = {
+static const struct reg_8 imx274_start_2[] = {
{IMX274_STANDBY_REG, 0x00},
{0x303E, 0x02}, /* SYS_MODE = 2 */
{IMX274_TABLE_END, 0x00}
};
/*
- * imx274 forth step register configuration for
+ * imx274 third step register configuration for
* starting stream
*/
-static const struct reg_8 imx274_start_4[] = {
+static const struct reg_8 imx274_start_3[] = {
{0x30F4, 0x00},
{0x3018, 0xA2}, /* XHS VHS OUTUPT */
{IMX274_TABLE_END, 0x00}
@@ -708,10 +702,6 @@ static int imx274_mode_regs(struct stimx274 *priv)
if (err)
return err;
- err = imx274_write_table(priv, imx274_start_2);
- if (err)
- return err;
-
err = imx274_write_table(priv, priv->mode->init_regs);
return err;
@@ -733,7 +723,7 @@ static int imx274_start_stream(struct stimx274 *priv)
* give it 1 extra ms for margin
*/
msleep_range(11);
- err = imx274_write_table(priv, imx274_start_3);
+ err = imx274_write_table(priv, imx274_start_2);
if (err)
return err;
@@ -743,7 +733,7 @@ static int imx274_start_stream(struct stimx274 *priv)
* give it 1 extra ms for margin
*/
msleep_range(8);
- err = imx274_write_table(priv, imx274_start_4);
+ err = imx274_write_table(priv, imx274_start_3);
if (err)
return err;
--
2.17.1
