diff options
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/imx8m/soc.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index e6bc977..1a752d8 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -726,6 +726,41 @@ int disable_vpu_nodes(void *blob) return -EPERM; } +#ifdef CONFIG_IMX8MN_LOW_DRIVE_MODE +static int low_drive_gpu_freq(void *blob) +{ + static const char *nodes_path_8mn[] = { + "/gpu@38000000", + "/soc@0/gpu@38000000" + }; + + int nodeoff, cnt, i; + u32 assignedclks[7]; + + nodeoff = fdt_path_offset(blob, nodes_path_8mn[0]); + if (nodeoff < 0) + return nodeoff; + + cnt = fdtdec_get_int_array_count(blob, nodeoff, "assigned-clock-rates", assignedclks, 7); + if (cnt < 0) + return cnt; + + if (cnt != 7) + printf("Warning: %s, assigned-clock-rates count %d\n", nodes_path_8mn[0], cnt); + + assignedclks[cnt - 1] = 200000000; + assignedclks[cnt - 2] = 200000000; + + for (i = 0; i < cnt; i++) { + debug("<%u>, ", assignedclks[i]); + assignedclks[i] = cpu_to_fdt32(assignedclks[i]); + } + debug("\n"); + + return fdt_setprop(blob, nodeoff, "assigned-clock-rates", &assignedclks, sizeof(assignedclks)); +} +#endif + int disable_gpu_nodes(void *blob) { static const char * const nodes_path_8mn[] = { @@ -895,6 +930,16 @@ usb_modify_speed: #elif defined(CONFIG_IMX8MN) if (is_imx8mnl() || is_imx8mndl() || is_imx8mnsl()) disable_gpu_nodes(blob); +#ifdef CONFIG_IMX8MN_LOW_DRIVE_MODE + else { + int ldm_gpu = low_drive_gpu_freq(blob); + + if (ldm_gpu < 0) + printf("Update GPU node assigned-clock-rates failed\n"); + else + printf("Update GPU node assigned-clock-rates ok\n"); + } +#endif if (is_imx8mnd() || is_imx8mndl()) disable_cpu_nodes(blob, 2); |