Temporarily use g_mbus_config() to determine the number of active data lanes used by the transmitter. If g_mbus_config is not supported or does not return the number of active lines, default to using all connected data lines.
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de> Acked-by: Steve Longerbeam <steve_longerb...@mentor.com> --- Changes since v2 [1]: - Rebased onto media/master [1] https://patchwork.kernel.org/patch/9964151/ --- drivers/staging/media/imx/imx6-mipi-csi2.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/staging/media/imx/imx6-mipi-csi2.c b/drivers/staging/media/imx/imx6-mipi-csi2.c index 6a1cee55a49b..ae91f0d138f3 100644 --- a/drivers/staging/media/imx/imx6-mipi-csi2.c +++ b/drivers/staging/media/imx/imx6-mipi-csi2.c @@ -135,10 +135,8 @@ static void csi2_enable(struct csi2_dev *csi2, bool enable) } } -static void csi2_set_lanes(struct csi2_dev *csi2) +static void csi2_set_lanes(struct csi2_dev *csi2, int lanes) { - int lanes = csi2->bus.num_data_lanes; - writel(lanes - 1, csi2->base + CSI2_N_LANES); } @@ -301,6 +299,9 @@ static void csi2ipu_gasket_init(struct csi2_dev *csi2) static int csi2_start(struct csi2_dev *csi2) { + const u32 mask = V4L2_MBUS_CSI2_LANE_MASK; + struct v4l2_mbus_config cfg; + int lanes = 0; int ret; ret = clk_prepare_enable(csi2->pix_clk); @@ -316,7 +317,10 @@ static int csi2_start(struct csi2_dev *csi2) goto err_disable_clk; /* Step 4 */ - csi2_set_lanes(csi2); + ret = v4l2_subdev_call(csi2->src_sd, video, g_mbus_config, &cfg); + if (ret == 0) + lanes = (cfg.flags & mask) >> __ffs(mask); + csi2_set_lanes(csi2, lanes ?: csi2->bus.num_data_lanes); csi2_enable(csi2, true); /* Step 5 */ -- 2.19.1
