samsung-sm8650/android_kernel_samsung_sm8650-modules
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

disp: msm: dsi: skip pll clock registration for trusted vm

Browse Source 
Trusted VM will be granted access to MDSS HW dynamically on
usecase boundary. As a result, all the attempts to access
HW before the assignment, including the probe time access
will result in Stage 2 faults. This change skips the
PLL clock registration during probe as the clocks will not
be controlled by the VM.

Change-Id: I326f4a775796cd95dcf398449b08f2682e4aca43
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
This commit is contained in:
Jeykumar Sankaran
2020-05-01 21:55:27 -07:00
parent 2310f221c0
commit e452acf2fb
1 changed files with 9 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
msm/dsi/dsi_pll.c
View File

@@ -118,6 +118,7 @@ int dsi_pll_init(struct platform_device *pdev, struct dsi_pll_resource **pll)
int rc = 0; int rc = 0;
const char *label; const char *label;
struct dsi_pll_resource *pll_res = NULL; struct dsi_pll_resource *pll_res = NULL;
bool in_trusted_vm = false;
if (!pdev->dev.of_node) { if (!pdev->dev.of_node) {
pr_err("Invalid DSI PHY node\n"); pr_err("Invalid DSI PHY node\n");
@@ -201,6 +202,14 @@ int dsi_pll_init(struct platform_device *pdev, struct dsi_pll_resource **pll)
return -ENOMEM; return -ENOMEM;
} }
in_trusted_vm = of_property_read_bool(pdev->dev.of_node,
"qcom,dsi-pll-in-trusted-vm");
if (in_trusted_vm) {
DSI_PLL_INFO(pll_res,
"Bypassing PLL clock register for Trusted VM\n");
return rc;
}
rc = dsi_pll_clock_register(pdev, pll_res); rc = dsi_pll_clock_register(pdev, pll_res);
if (rc) { if (rc) {
DSI_PLL_ERR(pll_res, "clock register failed rc=%d\n", rc); DSI_PLL_ERR(pll_res, "clock register failed rc=%d\n", rc);