[PATCH 5.4 079/408] media: i2c: ov5640: Remain in power down for DVP mode unless streaming

Greg Kroah-Hartman
2020-10-27T17:43:35Z

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

[ Upstream commit 3b987d70e903962eb8c5961ba166c345a49d1a0b ]

Keep the sensor in software power down mode and wake up only in
ov5640_set_stream_dvp() callback.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Tested-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/i2c/ov5640.c | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index b21ddbd514465..065f9706db7e5 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -34,6 +34,8 @@
#define OV5640_REG_SYS_RESET02 0x3002
#define OV5640_REG_SYS_CLOCK_ENABLE02 0x3006
#define OV5640_REG_SYS_CTRL0 0x3008
+#define OV5640_REG_SYS_CTRL0_SW_PWDN 0x42
+#define OV5640_REG_SYS_CTRL0_SW_PWUP 0x02
#define OV5640_REG_CHIP_ID 0x300a
#define OV5640_REG_IO_MIPI_CTRL00 0x300e
#define OV5640_REG_PAD_OUTPUT_ENABLE01 0x3017
@@ -1109,6 +1111,12 @@ static int ov5640_load_regs(struct ov5640_dev *sensor,
val = regs->val;
mask = regs->mask;

+ /* remain in power down mode for DVP */
+ if (regs->reg_addr == OV5640_REG_SYS_CTRL0 &&
+ val == OV5640_REG_SYS_CTRL0_SW_PWUP &&
+ sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY)
+ continue;
+
if (mask)
ret = ov5640_mod_reg(sensor, reg_addr, mask, val);
else
@@ -1286,9 +1294,14 @@ static int ov5640_set_stream_dvp(struct ov5640_dev *sensor, bool on)
* PAD OUTPUT ENABLE 02
* - [7:2]: D[5:0] output enable
*/
- return ov5640_write_reg(sensor,
- OV5640_REG_PAD_OUTPUT_ENABLE02,
- on ? 0xfc : 0);
+ ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT_ENABLE02,
+ on ? 0xfc : 0);
+ if (ret)
+ return ret;
+
+ return ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0, on ?
+ OV5640_REG_SYS_CTRL0_SW_PWUP :
+ OV5640_REG_SYS_CTRL0_SW_PWDN);
}

static int ov5640_set_stream_mipi(struct ov5640_dev *sensor, bool on)
--
2.25.1