imx: imx8mp: disable fused IP for UltraLite

Beside the fused modules on iMX8MP Lite, this part has also fused
GPU3D/2D, LVDS and MIPI DSI.
So we have to disable them for kernel and also disable MIPI DSI
in u-boot DTS for splash screen at runtime.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>

diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index 560bfb22a0d81dd37e4af539443133c1f4044c53..1f484e1cb27f129b8823a99f0a77ae4b0fd7a552 100644 (file)
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -911,6 +911,90 @@ static int low_drive_gpu_freq(void *blob)
 }
 #endif
 
+static bool check_remote_endpoint(void *blob, const char *ep1, const char *ep2)
+{
+       int lookup_node;
+       int nodeoff;
+
+       nodeoff = fdt_path_offset(blob, ep1);
+       if (nodeoff) {
+               lookup_node = fdtdec_lookup_phandle(blob, nodeoff, "remote-endpoint");
+               nodeoff = fdt_path_offset(blob, ep2);
+
+               if (nodeoff > 0 && nodeoff == lookup_node)
+                       return true;
+       }
+
+       return false;
+}
+
+int disable_dsi_lcdif_nodes(void *blob)
+{
+       int ret;
+
+       static const char * const dsi_path_8mp[] = {
+               "/soc@0/bus@32c00000/mipi_dsi@32e60000"
+       };
+
+       static const char * const lcdif_path_8mp[] = {
+               "/soc@0/bus@32c00000/lcd-controller@32e80000"
+       };
+
+       static const char * const lcdif_ep_path_8mp[] = {
+               "/soc@0/bus@32c00000/lcd-controller@32e80000/port@0/endpoint"
+       };
+       static const char * const dsi_ep_path_8mp[] = {
+               "/soc@0/bus@32c00000/mipi_dsi@32e60000/port@0/endpoint"
+       };
+
+       ret = disable_fdt_nodes(blob, dsi_path_8mp, ARRAY_SIZE(dsi_path_8mp));
+       if (ret)
+               return ret;
+
+       if (check_remote_endpoint(blob, dsi_ep_path_8mp[0], lcdif_ep_path_8mp[0])) {
+               /* Disable lcdif node */
+               return disable_fdt_nodes(blob, lcdif_path_8mp, ARRAY_SIZE(lcdif_path_8mp));
+       }
+
+       return 0;
+}
+
+int disable_lvds_lcdif_nodes(void *blob)
+{
+       int ret, i;
+
+       static const char * const ldb_path_8mp[] = {
+               "/soc@0/bus@32c00000/ldb@32ec005c",
+               "/soc@0/bus@32c00000/phy@32ec0128"
+       };
+
+       static const char * const lcdif_path_8mp[] = {
+               "/soc@0/bus@32c00000/lcd-controller@32e90000"
+       };
+
+       static const char * const lcdif_ep_path_8mp[] = {
+               "/soc@0/bus@32c00000/lcd-controller@32e90000/port@0/endpoint@0",
+               "/soc@0/bus@32c00000/lcd-controller@32e90000/port@0/endpoint@1"
+       };
+       static const char * const ldb_ep_path_8mp[] = {
+               "/soc@0/bus@32c00000/ldb@32ec005c/lvds-channel@0/port@0/endpoint",
+               "/soc@0/bus@32c00000/ldb@32ec005c/lvds-channel@1/port@0/endpoint"
+       };
+
+       ret = disable_fdt_nodes(blob, ldb_path_8mp, ARRAY_SIZE(ldb_path_8mp));
+       if (ret)
+               return ret;
+
+       for (i = 0; i < ARRAY_SIZE(ldb_ep_path_8mp); i++) {
+               if (check_remote_endpoint(blob, ldb_ep_path_8mp[i], lcdif_ep_path_8mp[i])) {
+                       /* Disable lcdif node */
+                       return disable_fdt_nodes(blob, lcdif_path_8mp, ARRAY_SIZE(lcdif_path_8mp));
+               }
+       }
+
+       return 0;
+}
+
 int disable_gpu_nodes(void *blob)
 {
        static const char * const nodes_path_8mn[] = {
@@ -918,7 +1002,15 @@ int disable_gpu_nodes(void *blob)
                "/soc@/gpu@38000000"
        };
 
-       return disable_fdt_nodes(blob, nodes_path_8mn, ARRAY_SIZE(nodes_path_8mn));
+       static const char * const nodes_path_8mp[] = {
+               "/gpu3d@38000000",
+               "/gpu2d@38008000"
+       };
+
+       if (is_imx8mp())
+               return disable_fdt_nodes(blob, nodes_path_8mp, ARRAY_SIZE(nodes_path_8mp));
+       else
+               return disable_fdt_nodes(blob, nodes_path_8mn, ARRAY_SIZE(nodes_path_8mn));
 }
 
 int disable_npu_nodes(void *blob)
@@ -1174,16 +1266,27 @@ usb_modify_speed:
                disable_cpu_nodes(blob, 3);
 
 #elif defined(CONFIG_IMX8MP)
-       if (is_imx8mpl())
+       if (is_imx8mpul()) {
+               /* Disable GPU */
+               disable_gpu_nodes(blob);
+
+               /* Disable DSI */
+               disable_dsi_lcdif_nodes(blob);
+
+               /* Disable LVDS */
+               disable_lvds_lcdif_nodes(blob);
+       }
+
+       if (is_imx8mpul() || is_imx8mpl())
                disable_vpu_nodes(blob);
 
-       if (is_imx8mpl() || is_imx8mp6())
+       if (is_imx8mpul() || is_imx8mpl() || is_imx8mp6())
                disable_npu_nodes(blob);
 
-       if (is_imx8mpl())
+       if (is_imx8mpul() || is_imx8mpl())
                disable_isp_nodes(blob);
 
-       if (is_imx8mpl() || is_imx8mp6())
+       if (is_imx8mpul() || is_imx8mpl() || is_imx8mp6())
                disable_dsp_nodes(blob);
 
        if (is_imx8mpd())
@@ -1194,6 +1297,40 @@ usb_modify_speed:
 }
 #endif
 
+#ifdef CONFIG_OF_BOARD_FIXUP
+#ifndef CONFIG_SPL_BUILD
+int board_fix_fdt(void *fdt)
+{
+       if (is_imx8mpul()) {
+               int i = 0;
+               int nodeoff, ret;
+               const char *status = "disabled";
+               static const char * const dsi_nodes[] = {
+                       "/soc@0/bus@32c00000/mipi_dsi@32e60000",
+                       "/soc@0/bus@32c00000/lcd-controller@32e80000",
+                       "/dsi-host"
+               };
+
+               for (i = 0; i < ARRAY_SIZE(dsi_nodes); i++) {
+                       nodeoff = fdt_path_offset(fdt, dsi_nodes[i]);
+                       if (nodeoff > 0) {
+set_status:
+                               ret = fdt_setprop(fdt, nodeoff, "status", status,
+                                                 strlen(status) + 1);
+                               if (ret == -FDT_ERR_NOSPACE) {
+                                       ret = fdt_increase_size(fdt, 512);
+                                       if (!ret)
+                                               goto set_status;
+                               }
+                       }
+               }
+       }
+
+       return 0;
+}
+#endif
+#endif
+
 #if !CONFIG_IS_ENABLED(SYSRESET)
 void reset_cpu(void)
 {