On 09/21/2017 08:30 AM, Philipp Zabel wrote:
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>
--- New in v2: - Use the active lanes reported via g_mbus_config(), if available, to configure the CSI2_N_LANES register correctly. --- 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 5061f3f524fd5..cd19730d0159c 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 */
