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| author | Liu Ying <Ying.Liu@freescale.com> | 2012-07-05 18:42:02 +0800 |
|---|---|---|
| committer | Terry Lv <r65388@freescale.com> | 2012-07-25 13:10:29 +0800 |
| commit | 2080169c7b965141634540b6bcf0d2976f404957 (patch) | |
| tree | d5f3d0ab04f7d666d8d40694ae67aa1164a604ab | |
| parent | e78e111ac3a51ec3e4dece15b36716ea7f112606 (diff) | |
| download | linux-2080169c7b965141634540b6bcf0d2976f404957.tar.gz | |
ENGR00215884-1 MX6 SabreSD:Refine OV mipi camera reset sequence
This patch refines OV mipi camera reset sequence according to
OV's recommendation:
reset --------------------|_____|----------------
->| 1ms |<-
pwdn ----------|_________________________|------
->| 5ms |<- ->| 5ms |<-
->| 5ms |<-
This change makes the OV mipi camera be at a correct status
after reset, otherwise, the wrong status of OV mipi camera
will reduce the ~2.78V analog camera power to ~2.3V, which
causes random thin colorful lines on OV5642 CSI camera image
as OV5642 CSI camera uses the same analog power.
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
(cherry picked from commit 9e78895d8856651b769908e63d4ebc514314eeaa)
| -rw-r--r-- | arch/arm/mach-mx6/board-mx6q_sabresd.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/mach-mx6/board-mx6q_sabresd.c b/arch/arm/mach-mx6/board-mx6q_sabresd.c index 2089e2bd3fef..07d76cecfa82 100644 --- a/arch/arm/mach-mx6/board-mx6q_sabresd.c +++ b/arch/arm/mach-mx6/board-mx6q_sabresd.c @@ -554,8 +554,14 @@ static void mx6q_mipi_sensor_io_init(void) /* Camera power down */ gpio_request(SABRESD_MIPICSI_PWN, "cam-pwdn"); gpio_direction_output(SABRESD_MIPICSI_PWN, 1); - msleep(1); + msleep(5); gpio_set_value(SABRESD_MIPICSI_PWN, 0); + msleep(5); + gpio_set_value(SABRESD_MIPICSI_RST, 0); + msleep(1); + gpio_set_value(SABRESD_MIPICSI_RST, 1); + msleep(5); + gpio_set_value(SABRESD_MIPICSI_PWN, 1); /*for mx6dl, mipi virtual channel 1 connect to csi 1*/ if (cpu_is_mx6dl()) |