MLK-16560-2: imx8: Use fsl,sc_rsrc_id binding to map device to rsrc

Using the SMMU for some devices (like dpu) requires a streamid to be
assigned to multiple resources.

Determining the resource ids for a device is a problem that occurs in
multiple contexts. So far uboot deals with this by parsing the
power-domain node which is insufficient here.

Add a new devicetree property called fsl,sc_rsrc_id which lists the
resource ids associated by a certain device.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Ye Li <ye.li@nxp.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit 75cdc9b6a476f3cef9e49d02873b9244ceb447c8)

diff --git a/arch/arm/mach-imx/imx8/cpu.c b/arch/arm/mach-imx/imx8/cpu.c
index 5533e18..30fe175 100644 (file)
--- a/arch/arm/mach-imx/imx8/cpu.c
+++ b/arch/arm/mach-imx/imx8/cpu.c
@@ -599,8 +599,23 @@ static int config_smmu_resource_sid(int rsrc, int sid)
 static int config_smmu_fdt_device_sid(void *blob, int device_offset, int sid)
 {
        int rsrc;
+       int proplen;
+       const fdt32_t *prop;
        const char *name = fdt_get_name(blob, device_offset, NULL);
 
+       prop = fdt_getprop(blob, device_offset, "fsl,sc_rsrc_id", &proplen);
+       if (prop) {
+               int i;
+
+               debug("configure node %s sid 0x%x for %d resources\n",
+                               name, sid, (int)(proplen / sizeof(fdt32_t)));
+               for (i = 0; i < proplen / sizeof(fdt32_t); ++i) {
+                       config_smmu_resource_sid(fdt32_to_cpu(prop[i]), sid);
+               }
+
+               return 0;
+       }
+
        rsrc = get_srsc_from_fdt_node_power_domain(blob, device_offset);
        debug("configure node %s sid 0x%x rsrc=%d\n", name, sid, rsrc);
        if (rsrc < 0) {