From: Peng Fan <peng....@nxp.com>
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...@nxp.com>
Signed-off-by: Peng Fan <peng....@nxp.com>
---
arch/arm/mach-imx/imx8m/soc.c | 147 ++++++++++++++++++++++++++++++++--
1 file changed, 142 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index e2d21bf6b8..91ff7eca59 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -905,6 +905,90 @@ 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[] = {
@@ -912,7 +996,15 @@ 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)
@@ -1168,16 +1260,27 @@ 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())
@@ -1188,6 +1291,40 @@ 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)
{
--
2.30.0
