v4l: xilinx-multi-scaler: Read tap from the device-tree

Previously the tap value is hardcoded to 6 in code.
This patch read the tap value from DT.

Signed-off-by: Suresh Gupta <suresh.gupta@xilinx.com>
Reviewed-by: Saurabh Sengar <saurabh.singh@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/drivers/media/platform/xilinx/xilinx-multi-scaler.c b/drivers/media/platform/xilinx/xilinx-multi-scaler.c
index 87a5a5a5d6671c6d9c9499292f59e14262893ed9..2941585d4f2c4a98abf991c585d9d393d63ea0da 100644 (file)
--- a/drivers/media/platform/xilinx/xilinx-multi-scaler.c
+++ b/drivers/media/platform/xilinx/xilinx-multi-scaler.c
@@ -550,8 +550,6 @@ static void xm2msc_set_chan_com_params(struct xm2msc_chan_ctx *chan_ctx)
        u32 pixel_rate;
        u32 line_rate;
 
-       /* Currently only 6 tabs supported */
-       chan_ctx->xm2msc_dev->taps = XSCALER_TAPS_6;
        xm2mvsc_initialize_coeff_banks(chan_ctx);
 
        pixel_rate = (out_q_data->width * XM2MSC_STEP_PRECISION) /
@@ -1832,6 +1830,16 @@ static int xm2msc_parse_of(struct platform_device *pdev,
                return -EINVAL;
        }
 
+       ret = of_property_read_u32(node, "xlnx,num-taps",
+                                  &xm2msc->taps);
+       if (ret || (xm2msc->taps != XSCALER_TAPS_6 &&
+                   xm2msc->taps != XSCALER_TAPS_8 &&
+                   xm2msc->taps != XSCALER_TAPS_10 &&
+                   xm2msc->taps != XSCALER_TAPS_12)) {
+               dev_err(dev, "missing/invalid taps in dts prop\n");
+               return -EINVAL;
+       }
+
        xm2msc->irq = irq_of_parse_and_map(node, 0);
        if (xm2msc->irq < 0) {
                dev_err(dev, "Unable to get IRQ");
@@ -1842,6 +1850,7 @@ static int xm2msc_parse_of(struct platform_device *pdev,
        dev_dbg(dev, "DMA Addr width Supported = %d\n", xm2msc->dma_addr_size);
        dev_dbg(dev, "Max col/row Supported = (%d) / (%d)\n",
                xm2msc->max_wd, xm2msc->max_ht);
+       dev_dbg(dev, "taps Supported = %d\n", xm2msc->taps);
        /* read supported video formats and update internal table */
        hw_vid_fmt_cnt = of_property_count_strings(node, "xlnx,vid-formats");