nv-tegra-mirror/linux-nvgpu
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nvgpu.git synced 2025-12-24 10:34:43 +03:00
Code Issues Packages Projects Releases Wiki Activity

gpu: nvgpu: Provide ability to select dgpu freq cap from DT

Browse Source 
Add support in nvgpu to parse and get the freq cap from DT.
The patch does below
Parse the DT and gets the freq cap value during probe.
During clk_arb init compare this with P0.Max and takes the lowest.
Send change_seq with the new value and set dgpu freq.
Use the lowest for "get points","get default","set VF".

Bug 200556366

Change-Id: Ie10243f9bf83cb5ae07ebcc4cdc8efaffa56c309
Signed-off-by: Abdul Salam <absalam@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2204644
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Abdul Salam
2019-11-07 12:19:34 +05:30
committed by Alex Waterman
parent 14cbf46c3e
commit 8d3427633f
6 changed files with 62 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/gpu/nvgpu/os/linux/pci.c
View File

@@ -429,6 +429,26 @@ static int nvgpu_pci_pm_deinit(struct device *dev)
return 0;
}
static int nvgpu_get_dt_clock_limit(struct gk20a *g, u16 *gpuclk_clkmhz)
{
struct device_node *np;
u32 gpuclk_dt_cap = 0U;
np = of_find_node_by_name(NULL, "nvgpu");
if (!np) {
return -ENOENT;
}
if (of_property_read_u32(np, "dgpuclk-max-mhz", &gpuclk_dt_cap)) {
nvgpu_info(g, "dgpuclk-max-mhz not defined,"
"P-state will be used");
}
*gpuclk_clkmhz = (u16)gpuclk_dt_cap;
return 0;
}
static int nvgpu_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *pent)
{
@@ -597,6 +617,11 @@ static int nvgpu_pci_probe(struct pci_dev *pdev,
}
}
err = nvgpu_get_dt_clock_limit(g, &g->dgpu_max_clk);
if (err != 0) {
nvgpu_info(g, "Missing nvgpu node");
}
err = nvgpu_pci_add_pci_power(pdev);
if (err) {
nvgpu_err(g, "add pci power failed (%d).", err);