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

disp: msm: dsi: enable ESD trigger through debugfs in trsuted-vm

Browse Source 
Add support to trigger ESD through debugfs by directly
modifying the reset GPIOs TLMM register in trusted-vm as GPIO
driver support is not enabled.

Change-Id: I859affe69c13dbe115a48b0a63a600a57027db58
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>
This commit is contained in:
Veera Sundaram Sankaran
2020-11-06 14:09:10 -08:00
parent 6dd2c3cd87
commit c99f3fd6ae
3 changed files with 41 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
msm/dsi/dsi_display.c
View File

@@ -1529,7 +1529,8 @@ static ssize_t debugfs_esd_trigger_check(struct file *file,
if (display->esd_trigger) { if (display->esd_trigger) {
DSI_INFO("ESD attack triggered by user\n"); DSI_INFO("ESD attack triggered by user\n");
rc = dsi_panel_trigger_esd_attack(display->panel); rc = dsi_panel_trigger_esd_attack(display->panel,
display->trusted_vm_env);
if (rc) { if (rc) {
DSI_ERR("Failed to trigger ESD attack\n"); DSI_ERR("Failed to trigger ESD attack\n");
goto error; goto error;

53
msm/dsi/dsi_panel.c
View File

@@ -191,29 +191,52 @@ static int dsi_panel_gpio_release(struct dsi_panel *panel)
return rc; return rc;
} }
int dsi_panel_trigger_esd_attack(struct dsi_panel *panel) int dsi_panel_trigger_esd_attack(struct dsi_panel *panel, bool trusted_vm_env)
{ {
struct dsi_panel_reset_config *r_config;
if (!panel) { if (!panel) {
DSI_ERR("Invalid panel param\n"); DSI_ERR("Invalid panel param\n");
return -EINVAL; return -EINVAL;
} }
r_config = &panel->reset_config; /* toggle reset-gpio by writing directly to register in trusted-vm */
if (!r_config) { if (trusted_vm_env) {
DSI_ERR("Invalid panel reset configuration\n"); struct dsi_tlmm_gpio *gpio = NULL;
return -EINVAL; void __iomem *io;
u32 offset = 0x4;
int i;
for (i = 0; i < panel->tlmm_gpio_count; i++)
if (!strcmp(panel->tlmm_gpio[i].name, "reset-gpio"))
gpio = &panel->tlmm_gpio[i];
if (!gpio) {
DSI_ERR("reset gpio not found\n");
return -EINVAL;
}
io = ioremap(gpio->addr, gpio->size);
writel_relaxed(0, io + offset);
iounmap(io);
} else {
struct dsi_panel_reset_config *r_config = &panel->reset_config;
if (!r_config) {
DSI_ERR("Invalid panel reset configuration\n");
return -EINVAL;
}
if (!gpio_is_valid(r_config->reset_gpio)) {
DSI_ERR("failed to pull down gpio\n");
return -EINVAL;
}
gpio_set_value(r_config->reset_gpio, 0);
} }
if (gpio_is_valid(r_config->reset_gpio)) { SDE_EVT32(SDE_EVTLOG_FUNC_CASE1);
gpio_set_value(r_config->reset_gpio, 0); DSI_INFO("GPIO pulled low to simulate ESD\n");
SDE_EVT32(SDE_EVTLOG_FUNC_CASE1);
DSI_INFO("GPIO pulled low to simulate ESD\n"); return 0;
return 0;
}
DSI_ERR("failed to pull down gpio\n");
return -EINVAL;
} }
static int dsi_panel_reset(struct dsi_panel *panel) static int dsi_panel_reset(struct dsi_panel *panel)

2
msm/dsi/dsi_panel.h
View File

@@ -298,7 +298,7 @@ struct dsi_panel *dsi_panel_get(struct device *parent,
int topology_override, int topology_override,
bool trusted_vm_env); bool trusted_vm_env);
int dsi_panel_trigger_esd_attack(struct dsi_panel *panel); int dsi_panel_trigger_esd_attack(struct dsi_panel *panel, bool trusted_vm_env);
void dsi_panel_put(struct dsi_panel *panel); void dsi_panel_put(struct dsi_panel *panel);