[PATCH 5.8 120/633] media: i2c: ov5640: Separate out mipi configuration from s_power

Greg Kroah-Hartman
2020-10-27T17:27:41Z

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

[ Upstream commit b1751ae652fb95919c08df5bdd739ccf9886158a ]

In preparation for adding DVP configuration in s_power callback
move mipi configuration into separate function

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 | 116 +++++++++++++++++++------------------
1 file changed, 60 insertions(+), 56 deletions(-)

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index 6e558a7e2d244..90db5443c4248 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -2014,6 +2014,61 @@ static void ov5640_set_power_off(struct ov5640_dev *sensor)
clk_disable_unprepare(sensor->xclk);
}

+static int ov5640_set_power_mipi(struct ov5640_dev *sensor, bool on)
+{
+ int ret;
+
+ if (!on) {
+ /* Reset MIPI bus settings to their default values. */
+ ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x58);
+ ov5640_write_reg(sensor, OV5640_REG_MIPI_CTRL00, 0x04);
+ ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT00, 0x00);
+ return 0;
+ }
+
+ /*
+ * Power up MIPI HS Tx and LS Rx; 2 data lanes mode
+ *
+ * 0x300e = 0x40
+ * [7:5] = 010 : 2 data lanes mode (see FIXME note in
+ * "ov5640_set_stream_mipi()")
+ * [4] = 0 : Power up MIPI HS Tx
+ * [3] = 0 : Power up MIPI LS Rx
+ * [2] = 0 : MIPI interface disabled
+ */
+ ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x40);
+ if (ret)
+ return ret;
+
+ /*
+ * Gate clock and set LP11 in 'no packets mode' (idle)
+ *
+ * 0x4800 = 0x24
+ * [5] = 1 : Gate clock when 'no packets'
+ * [2] = 1 : MIPI bus in LP11 when 'no packets'
+ */
+ ret = ov5640_write_reg(sensor, OV5640_REG_MIPI_CTRL00, 0x24);
+ if (ret)
+ return ret;
+
+ /*
+ * Set data lanes and clock in LP11 when 'sleeping'
+ *
+ * 0x3019 = 0x70
+ * [6] = 1 : MIPI data lane 2 in LP11 when 'sleeping'
+ * [5] = 1 : MIPI data lane 1 in LP11 when 'sleeping'
+ * [4] = 1 : MIPI clock lane in LP11 when 'sleeping'
+ */
+ ret = ov5640_write_reg(sensor, OV5640_REG_PAD_OUTPUT00, 0x70);
+ if (ret)
+ return ret;
+
+ /* Give lanes some time to coax into LP11 state. */
+ usleep_range(500, 1000);
+
+ return 0;
+}
+
static int ov5640_set_power(struct ov5640_dev *sensor, bool on)
{
int ret = 0;
@@ -2026,67 +2081,16 @@ static int ov5640_set_power(struct ov5640_dev *sensor, bool on)
ret = ov5640_restore_mode(sensor);
if (ret)
goto power_off;
+ }

- /* We're done here for DVP bus, while CSI-2 needs setup. */
- if (sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY)
- return 0;
-
- /*
- * Power up MIPI HS Tx and LS Rx; 2 data lanes mode
- *
- * 0x300e = 0x40
- * [7:5] = 010 : 2 data lanes mode (see FIXME note in
- * "ov5640_set_stream_mipi()")
- * [4] = 0 : Power up MIPI HS Tx
- * [3] = 0 : Power up MIPI LS Rx
- * [2] = 0 : MIPI interface disabled
- */
- ret = ov5640_write_reg(sensor,
- OV5640_REG_IO_MIPI_CTRL00, 0x40);
- if (ret)
- goto power_off;
-
- /*
- * Gate clock and set LP11 in 'no packets mode' (idle)
- *
- * 0x4800 = 0x24
- * [5] = 1 : Gate clock when 'no packets'
- * [2] = 1 : MIPI bus in LP11 when 'no packets'
- */
- ret = ov5640_write_reg(sensor,
- OV5640_REG_MIPI_CTRL00, 0x24);
- if (ret)
- goto power_off;
-
- /*
- * Set data lanes and clock in LP11 when 'sleeping'
- *
- * 0x3019 = 0x70
- * [6] = 1 : MIPI data lane 2 in LP11 when 'sleeping'
- * [5] = 1 : MIPI data lane 1 in LP11 when 'sleeping'
- * [4] = 1 : MIPI clock lane in LP11 when 'sleeping'
- */
- ret = ov5640_write_reg(sensor,
- OV5640_REG_PAD_OUTPUT00, 0x70);
+ if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) {
+ ret = ov5640_set_power_mipi(sensor, on);
if (ret)
goto power_off;
+ }

- /* Give lanes some time to coax into LP11 state. */
- usleep_range(500, 1000);
-
- } else {
- if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) {
- /* Reset MIPI bus settings to their default values. */
- ov5640_write_reg(sensor,
- OV5640_REG_IO_MIPI_CTRL00, 0x58);
- ov5640_write_reg(sensor,
- OV5640_REG_MIPI_CTRL00, 0x04);
- ov5640_write_reg(sensor,
- OV5640_REG_PAD_OUTPUT00, 0x00);
- }
-
+ if (!on)
ov5640_set_power_off(sensor);
- }

return 0;

--
2.25.1