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Commit a72515f2 authored by Samantha Tran's avatar Samantha Tran
Browse files

drm/msm/dsi-staging: enable panel switching 



Update panel properties using configuration file that can
be provided as a firmware. Use this configuration file if
it exists otherwise use panel properties from device tree.

Change-Id: Ie25fc74112397556c05b1fe8200a3ff9acd2a442
Signed-off-by: default avatarSamantha Tran <samtran@codeaurora.org>
parent 0e01c2e9

drivers/gpu/drm/msm/dsi-staging/dsi_panel.c

+72 −24
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/gpio.h>

#include <linux/of_gpio.h>

#include <video/mipi_display.h>

#include <linux/firmware.h>



#include "dsi_panel.h"

#include "dsi_ctrl_hw.h"
@@ -682,12 +683,58 @@ static int dsi_panel_bl_unregister(struct dsi_panel *panel) 
error:

	return rc;

}

static int dsi_panel_parse_timing(struct dsi_mode_info *mode,



static int dsi_panel_fw_parse(const struct firmware *fw_entry,

		char *id_match, u32 *param_value)

{

	int value, numlen = 1, index = 0;

	char id[SZ_256];



	while (sscanf(fw_entry->data + index,

			"%255s %d", id, &value) > 0) {

		if (!strcmp(id, id_match)) {

			*param_value = value;

			return 0;

		}



		while ((value / 10) > 0) {

			value /= 10;

			numlen++;

		}



		index += (strlen(id) + numlen + 1);

		numlen = 1;

	}



	return -EINVAL;

}



static int dsi_panel_parse(struct device_node *of_node,

	const struct firmware *fw_entry, char *id_match, u32 *val)

{

	if (fw_entry && fw_entry->data)

		return dsi_panel_fw_parse(fw_entry, id_match, val);

	else

		return of_property_read_u32(of_node, id_match, val);



	return 0;

}



static int dsi_panel_parse_timing(struct device *parent,

	struct dsi_mode_info *mode, const char *name,

	struct device_node *of_node)

{

	int rc = 0;

	int fw = 0, rc = 0;

	u64 tmp64;

	struct dsi_display_mode *display_mode;

	const struct firmware *fw_entry = NULL;

	char *fw_name = "dsi_prop";



	if (strcmp(name, "Simulator video mode dsi panel") == 0)

		fw = request_firmware(&fw_entry, fw_name, parent);



	if (fw)

		fw_entry = NULL;



	display_mode = container_of(mode, struct dsi_display_mode, timing);
@@ -702,47 +749,47 @@ static int dsi_panel_parse_timing(struct dsi_mode_info *mode, 
	mode->clk_rate_hz = !rc ? tmp64 : 0;

	display_mode->priv_info->clk_rate_hz = mode->clk_rate_hz;



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-panel-framerate",

				  &mode->refresh_rate);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-panel-framerate", &mode->refresh_rate);

	if (rc) {

		pr_err("failed to read qcom,mdss-dsi-panel-framerate, rc=%d\n",

		       rc);

		goto error;

	}



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-panel-width",

				  &mode->h_active);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-panel-width", &mode->h_active);

	if (rc) {

		pr_err("failed to read qcom,mdss-dsi-panel-width, rc=%d\n", rc);

		goto error;

	}



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-h-front-porch",

				  &mode->h_front_porch);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-h-front-porch", &mode->h_front_porch);

	if (rc) {

		pr_err("failed to read qcom,mdss-dsi-h-front-porch, rc=%d\n",

		       rc);

		goto error;

	}



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-h-back-porch",

				  &mode->h_back_porch);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-h-back-porch", &mode->h_back_porch);

	if (rc) {

		pr_err("failed to read qcom,mdss-dsi-h-back-porch, rc=%d\n",

		       rc);

		goto error;

	}



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-h-pulse-width",

				  &mode->h_sync_width);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-h-pulse-width", &mode->h_sync_width);

	if (rc) {

		pr_err("failed to read qcom,mdss-dsi-h-pulse-width, rc=%d\n",

		       rc);

		goto error;

	}



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-h-sync-skew",

				  &mode->h_skew);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-h-sync-skew", &mode->h_skew);

	if (rc)

		pr_err("qcom,mdss-dsi-h-sync-skew is not defined, rc=%d\n", rc);
@@ -750,32 +797,32 @@ static int dsi_panel_parse_timing(struct dsi_mode_info *mode, 
		mode->h_active, mode->h_front_porch, mode->h_back_porch,

		mode->h_sync_width);



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-panel-height",

				  &mode->v_active);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-panel-height", &mode->v_active);

	if (rc) {

		pr_err("failed to read qcom,mdss-dsi-panel-height, rc=%d\n",

		       rc);

		goto error;

	}



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-v-back-porch",

				  &mode->v_back_porch);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-v-back-porch", &mode->v_back_porch);

	if (rc) {

		pr_err("failed to read qcom,mdss-dsi-v-back-porch, rc=%d\n",

		       rc);

		goto error;

	}



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-v-front-porch",

				  &mode->v_front_porch);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-v-front-porch", &mode->v_front_porch);

	if (rc) {

		pr_err("failed to read qcom,mdss-dsi-v-back-porch, rc=%d\n",

		       rc);

		goto error;

	}



	rc = of_property_read_u32(of_node, "qcom,mdss-dsi-v-pulse-width",

				  &mode->v_sync_width);

	rc = dsi_panel_parse(of_node, fw_entry,

		"qcom,mdss-dsi-v-pulse-width", &mode->v_sync_width);

	if (rc) {

		pr_err("failed to read qcom,mdss-dsi-v-pulse-width, rc=%d\n",

		       rc);
@@ -3034,7 +3081,8 @@ int dsi_panel_get_mode(struct dsi_panel *panel, 
		if (index != child_idx++)

			continue;



		rc = dsi_panel_parse_timing(&mode->timing, child_np);

		rc = dsi_panel_parse_timing(panel->parent, &mode->timing,

			panel->name, child_np);

		if (rc) {

			pr_err("failed to parse panel timing, rc=%d\n", rc);

			goto parse_fail;