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Commit 6bfe6183 authored by Chandan Uddaraju's avatar Chandan Uddaraju
Browse files

mdss: dsi: Add support to control bias voltage regulator 



The bias voltage regulator is controlled by wled driver
for the sharp panel on 8994. Add support to control this
regulator to fix suspend/resume issues.

Add optional "qcom,dsi-panel-bias-vreg" property to
support this on specific platforms.

Change-Id: Ifb02a0467dc190e673781490a918c12293d41d58
Signed-off-by: default avatarChandan Uddaraju <chandanu@codeaurora.org>
parent 063ce9b1

Documentation/devicetree/bindings/fb/mdss-dsi-ctrl.txt

+2 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ Optional properties: 
					controller. These pin configurations are installed in the pinctrl

					device node. Refer to pinctrl-bindings.txt

- qcom,regulator-ldo-mode:		Boolean to enable ldo mode for the dsi phy regulator

- qcom,dsi-panel-bias-vreg:		Boolean to enable control of panel bias regulator



Example:

        mdss_dsi0: qcom,mdss_dsi@fd922800 {
@@ -105,6 +106,7 @@ Example: 
		qcom,platform-enable-gpio = <&msmgpio 58 1>;

		qcom,platform-bklight-en-gpio = <&msmgpio 86 0>;

		qcom,platform-mode-gpio = <&msmgpio 7 0>;

		qcom,dsi-panel-bias-vreg;



		qcom,core-supply-entries {

			#address-cells = <1>;

drivers/video/msm/mdss/mdss_dsi.c

+29 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/gpio.h>

#include <linux/err.h>

#include <linux/regulator/consumer.h>

#include <linux/leds-qpnp-wled.h>



#include "mdss.h"

#include "mdss_panel.h"
@@ -100,6 +101,16 @@ static int mdss_dsi_panel_power_on(struct mdss_panel_data *pdata, int enable) 
				goto error_enable;

			}

		}

		if (ctrl_pdata->panel_bias_vreg) {

			pr_debug("%s: Enable panel bias vreg. ndx = %d\n",

			       __func__, ctrl_pdata->ndx);

			if (qpnp_ibb_enable(true))

				pr_err("Unable to configure bias vreg\n");

			/*

			 * Add delay recommended by panel specs

			 */

			udelay(2000);

		}



		if (!pdata->panel_info.mipi.lp11_init) {

			if (mdss_dsi_pinctrl_set_state(ctrl_pdata, true))
@@ -122,6 +133,16 @@ static int mdss_dsi_panel_power_on(struct mdss_panel_data *pdata, int enable) 
		if (mdss_dsi_pinctrl_set_state(ctrl_pdata, false))

			pr_debug("reset disable: pinctrl not enabled\n");



		if (ctrl_pdata->panel_bias_vreg) {

			pr_debug("%s: Disabling panel bias vreg. ndx = %d\n",

			       __func__, ctrl_pdata->ndx);

			if (qpnp_ibb_enable(false))

				pr_err("Unable to disable bias vreg\n");

			/*

			 * Add delay recommended by panel specs

			 */

			udelay(2000);

		}

		for (i = DSI_MAX_PM - 1; i >= 0; i--) {

			/*

			 * Core power module will be disabled when the
@@ -1465,6 +1486,14 @@ static int mdss_dsi_ctrl_probe(struct platform_device *pdev) 
		}

	}



	/*

	 * Currently, the Bias vreg is controlled by wled driver.

	 * Once we have support from pmic driver, implement the

	 * bias vreg control using the existing vreg apis.

	 */

	ctrl_pdata->panel_bias_vreg = of_property_read_bool(

			pdev->dev.of_node, "qcom,dsi-panel-bias-vreg");



	/* DSI panels can be different between controllers */

	rc = mdss_dsi_get_panel_cfg(panel_cfg);

	if (!rc)

drivers/video/msm/mdss/mdss_dsi.h

+1 −0
Original line number Diff line number Diff line
@@ -306,6 +306,7 @@ struct mdss_dsi_ctrl_pdata { 
	int bklt_max;

	int new_fps;

	int pwm_enabled;

	bool panel_bias_vreg;

	struct mdss_rect roi;

	struct pwm_device *pwm_bl;

	struct dsi_drv_cm_data shared_pdata;