/**
* mdss_dsi_find_panel_of_node(): find device node of dsi panel
* @pdev: platform_device of the dsi ctrl node
* @panel_cfg: string containing intf specific config data
*
* Function finds the panel device node using the interface
* specific configuration data. This configuration data is
* could be derived from the result of bootloader's GCDB
* panel detection mechanism. If such config data doesn't
* exist then this panel returns the default panel configured
* in the device tree.
*
* returns pointer to panel node on success, NULL on error.
*/
static struct device_node *mdss_dsi_find_panel_of_node(
struct platform_device *pdev, char *panel_cfg,
struct mdss_dsi_ctrl_pdata *ctrl_pdata)
{
int len, i;
int ctrl_id = pdev->id - 1;
char panel_name[MDSS_MAX_PANEL_LEN];
char ctrl_id_stream[3] = "0:";
char *stream = NULL, *pan = NULL;
struct device_node *dsi_pan_node = NULL, *mdss_node = NULL;
len = strlen(panel_cfg);
if (!len) {
dsi_pan_node = mdss_dsi_panel_search_dt_nodes(pdev,
ctrl_pdata);
if (dsi_pan_node)
return dsi_pan_node;
/* no panel cfg chg, parse dt */
pr_debug("%s:%d: no cmd line cfg present\n",
__func__, __LINE__);
goto end;
} else {
if (ctrl_id == 1)
strlcpy(ctrl_id_stream, "1:", 3);
stream = strnstr(panel_cfg, ctrl_id_stream, len);
if (!stream) {
pr_err("controller config is not present\n");
goto end;
}
stream += 2;
pan = strnchr(stream, strlen(stream), ':');
if (!pan) {
strlcpy(panel_name, stream, MDSS_MAX_PANEL_LEN);
} else {
for (i = 0; (stream + i) < pan; i++)
panel_name[i] = *(stream + i);
panel_name[i] = 0;
}
pr_debug("%s:%d:%s:%s\n", __func__, __LINE__,
panel_cfg, panel_name);
mdss_node = of_parse_phandle(pdev->dev.of_node,
"qcom,mdss-mdp", 0);
if (!mdss_node) {
pr_err("%s: %d: mdss_node null\n",
__func__, __LINE__);
return NULL;
}
dsi_pan_node = of_find_node_by_name(mdss_node,
panel_name);
if (!dsi_pan_node) {
pr_err("%s: invalid pan node, selecting prim panel\n",
__func__);
goto end;
}
return dsi_pan_node;
}
end:
dsi_pan_node = mdss_dsi_pref_prim_panel(pdev);
return dsi_pan_node;
}
/**
* mdss_dsi_find_panel_of_node(): find device node of dsi panel
* @pdev: platform_device of the dsi ctrl node
* @panel_cfg: string containing intf specific config data
*
* Function finds the panel device node using the interface
* specific configuration data. This configuration data is
* could be derived from the result of bootloader's GCDB
* panel detection mechanism. If such config data doesn't
* exist then this panel returns the default panel configured
* in the device tree.
*
* returns pointer to panel node on success, NULL on error.
*/
static struct device_node *mdss_dsi_find_panel_of_node(
struct platform_device *pdev, char *panel_cfg,
struct mdss_dsi_ctrl_pdata *ctrl_pdata)
{
int l;
int ctrl_id = -1;
char *panel_name;
struct device_node *dsi_pan_node = NULL, *mdss_node = NULL;
l = strlen(panel_cfg);
if (!l) {
dsi_pan_node = mdss_dsi_panel_search_dt_nodes(pdev,
ctrl_pdata);
if (dsi_pan_node)
return dsi_pan_node;
/* no panel cfg chg, parse dt */
pr_debug("%s:%d: no cmd line cfg present\n",
__func__, __LINE__);
dsi_pan_node = of_parse_phandle(
pdev->dev.of_node,
"qcom,dsi-pref-prim-pan", 0);
if (!dsi_pan_node) {
pr_err("%s:can't find panel phandle\n",
__func__);
return NULL;
}
} else {
if (panel_cfg[0] == '0') {
pr_debug("%s:%d: DSI ctrl 1\n", __func__, __LINE__);
ctrl_id = 0;
} else if (panel_cfg[0] == '1') {
pr_debug("%s:%d: DSI ctrl 2\n", __func__, __LINE__);
ctrl_id = 1;
}
if ((pdev->id - 1) != ctrl_id) {
pr_err("%s:%d:pdev_ID=[%d]\n",
__func__, __LINE__, pdev->id);
return NULL;
}
/*
* skip first two chars '<dsi_ctrl_id>' and
* ':' to get to the panel name
*/
panel_name = panel_cfg + 2;
pr_debug("%s:%d:%s:%s\n", __func__, __LINE__,
panel_cfg, panel_name);
mdss_node = of_parse_phandle(pdev->dev.of_node,
"qcom,mdss-mdp", 0);
if (!mdss_node) {
pr_err("%s: %d: mdss_node null\n",
__func__, __LINE__);
return NULL;
}
dsi_pan_node = of_find_node_by_name(mdss_node,
panel_name);
if (!dsi_pan_node) {
pr_err("%s: invalid pan node\n",
__func__);
return NULL;
}
}
return dsi_pan_node;
}
