From: Naushir Patuck naush@raspberrypi.com
[ Upstream commit 697a252bb2ea414cc1c0b4cf4e3d94a879eaf162 ]
The imx219/imx708 sensors frequently generate a single corrupt frame (image or embedded data) when the sensor first starts. This can either be a missing line, or invalid samples within the line. This only occurrs using the upstream Unicam kernel driver.
Disabling trigger mode elimiates this corruption. Since trigger mode is a legacy feature copied from the firmware driver and not expected to be needed, remove it. Tested on the Raspberry Pi cameras and shows no ill effects.
Signed-off-by: Naushir Patuck naush@raspberrypi.com Reviewed-by: Jacopo Mondi jacopo.mondi@ideasonboard.com 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/platform/broadcom/bcm2835-unicam.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/drivers/media/platform/broadcom/bcm2835-unicam.c b/drivers/media/platform/broadcom/bcm2835-unicam.c index 3aed0e493c81f..4090a8e477402 100644 --- a/drivers/media/platform/broadcom/bcm2835-unicam.c +++ b/drivers/media/platform/broadcom/bcm2835-unicam.c @@ -816,11 +816,6 @@ static irqreturn_t unicam_isr(int irq, void *dev) } }
- if (unicam_reg_read(unicam, UNICAM_ICTL) & UNICAM_FCM) { - /* Switch out of trigger mode if selected */ - unicam_reg_write_field(unicam, UNICAM_ICTL, 1, UNICAM_TFC); - unicam_reg_write_field(unicam, UNICAM_ICTL, 0, UNICAM_FCM); - } return IRQ_HANDLED; }
@@ -984,8 +979,7 @@ static void unicam_start_rx(struct unicam_device *unicam,
unicam_reg_write_field(unicam, UNICAM_ANA, 0, UNICAM_DDL);
- /* Always start in trigger frame capture mode (UNICAM_FCM set) */ - val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_FCM | UNICAM_IBOB; + val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_IBOB; line_int_freq = max(fmt->height >> 2, 128); unicam_set_field(&val, line_int_freq, UNICAM_LCIE_MASK); unicam_reg_write(unicam, UNICAM_ICTL, val);