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Commit c99f3fd6 authored by Veera Sundaram Sankaran's avatar Veera Sundaram Sankaran
Browse files

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



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: default avatarVeera Sundaram Sankaran <veeras@codeaurora.org>
parent 6dd2c3cd

msm/dsi/dsi_display.c

+2 −1
Original line number Diff line number Diff line
@@ -1529,7 +1529,8 @@ static ssize_t debugfs_esd_trigger_check(struct file *file, 


	if (display->esd_trigger) {

		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) {

			DSI_ERR("Failed to trigger ESD attack\n");

			goto error;

msm/dsi/dsi_panel.c

+37 −14
Original line number Diff line number Diff line
@@ -191,30 +191,53 @@ static int dsi_panel_gpio_release(struct dsi_panel *panel) 
	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) {

		DSI_ERR("Invalid panel param\n");

		return -EINVAL;

	}



	r_config = &panel->reset_config;

	/* toggle reset-gpio by writing directly to register in trusted-vm */

	if (trusted_vm_env) {

		struct dsi_tlmm_gpio *gpio = NULL;

		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)) {

		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);

	}



	SDE_EVT32(SDE_EVTLOG_FUNC_CASE1);

	DSI_INFO("GPIO pulled low to simulate ESD\n");



	return 0;

}

	DSI_ERR("failed to pull down gpio\n");

	return -EINVAL;

}



static int dsi_panel_reset(struct dsi_panel *panel)

{

msm/dsi/dsi_panel.h

+1 −1
Original line number Diff line number Diff line
@@ -298,7 +298,7 @@ struct dsi_panel *dsi_panel_get(struct device *parent, 
				int topology_override,

				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);