On Fri, Mar 13, 2020 at 01:41:16PM +0200, Tomi Valkeinen wrote: > CAL_CSI2_CTX register has LINES field, which, according to the > documentation, should be programmed to the number of lines transmitted > by the camera. If the number of lines is unknown, it can be set to 0. > The driver sets the field to 0 for some reason, even if we know the > number of lines. > > This patch sets the number of lines properly, which will allow the HW to > discard extra lines (if the sensor would send such for some reason), > and, according to documentation: "This leads to regular video timings > and avoids potential artifacts". And possibly buffer overflows ! > Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > --- > drivers/media/platform/ti-vpe/cal.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c > index b5fd90a1ec09..832f37ebad0d 100644 > --- a/drivers/media/platform/ti-vpe/cal.c > +++ b/drivers/media/platform/ti-vpe/cal.c > @@ -961,8 +961,7 @@ static void csi2_ctx_config(struct cal_ctx *ctx) > set_field(&val, 0x1, CAL_CSI2_CTX_DT_MASK); > /* Virtual Channel from the CSI2 sensor usually 0! */ > set_field(&val, ctx->virtual_channel, CAL_CSI2_CTX_VC_MASK); > - /* NUM_LINES_PER_FRAME => 0 means auto detect */ > - set_field(&val, 0, CAL_CSI2_CTX_LINES_MASK); > + set_field(&val, ctx->v_fmt.fmt.pix.height, CAL_CSI2_CTX_LINES_MASK); > set_field(&val, CAL_CSI2_CTX_ATT_PIX, CAL_CSI2_CTX_ATT_MASK); > set_field(&val, CAL_CSI2_CTX_PACK_MODE_LINE, > CAL_CSI2_CTX_PACK_MODE_MASK); -- Regards, Laurent Pinchart
