Commit 2080169c authored by Liu Ying's avatar Liu Ying Committed by Terry Lv

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: default avatarLiu Ying <Ying.Liu@freescale.com>
(cherry picked from commit 9e78895d8856651b769908e63d4ebc514314eeaa)
parent e78e111a
......@@ -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())
......
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