disp: msm: sde: refactor dsi_display_get_modes function

Refactor the function 'dsi_display_get_modes' to
reduce its complexity.

Change-Id: I1a8ecaa780e5070bac7fa40404677c0a8a5d7cd8
Signed-off-by: Shamika Joshi <quic_shamjosh@quicinc.com>

msm/dsi/dsi_display.c

@@ -6970,58 +6970,15 @@ void dsi_display_put_mode(struct dsi_display *display,
 	dsi_panel_put_mode(mode);
 }
 
-int dsi_display_get_modes(struct dsi_display *display,
+int dsi_display_get_modes_helper(struct dsi_display *display,
-			  struct dsi_display_mode **out_modes)
+	struct dsi_display_ctrl *ctrl, u32 timing_mode_count,
+	struct dsi_dfps_capabilities dfps_caps, struct dsi_qsync_capabilities *qsync_caps,
+	struct dsi_dyn_clk_caps *dyn_clk_caps)
 {
-	struct dsi_dfps_capabilities dfps_caps;
+	int dsc_modes = 0, nondsc_modes = 0, rc = 0, i, start, end;
-	struct dsi_display_ctrl *ctrl;
+	u32 num_dfps_rates, mode_idx, sublinks_count, array_idx = 0;
-	struct dsi_host_common_cfg *host = &display->panel->host_config;
 	bool is_split_link, support_cmd_mode, support_video_mode;
-	u32 num_dfps_rates, timing_mode_count, display_mode_count;
+	struct dsi_host_common_cfg *host = &display->panel->host_config;
-	u32 sublinks_count, mode_idx, array_idx = 0;
-	struct dsi_dyn_clk_caps *dyn_clk_caps;
-	int i, start, end, rc = -EINVAL;
-	int dsc_modes = 0, nondsc_modes = 0;
-	struct dsi_qsync_capabilities *qsync_caps;
-
-	if (!display || !out_modes) {
-		DSI_ERR("Invalid params\n");
-		return -EINVAL;
-	}
-
-	*out_modes = NULL;
-	ctrl = &display->ctrl[0];
-
-	mutex_lock(&display->display_lock);
-
-	if (display->modes)
-		goto exit;
-
-	display_mode_count = display->panel->num_display_modes;
-
-	display->modes = kcalloc(display_mode_count, sizeof(*display->modes),
-			GFP_KERNEL);
-	if (!display->modes) {
-		rc = -ENOMEM;
-		goto error;
-	}
-
-	rc = dsi_panel_get_dfps_caps(display->panel, &dfps_caps);
-	if (rc) {
-		DSI_ERR("[%s] failed to get dfps caps from panel\n",
-				display->name);
-		goto error;
-	}
-
-	qsync_caps = &(display->panel->qsync_caps);
-	dyn_clk_caps = &(display->panel->dyn_clk_caps);
-
-	timing_mode_count = display->panel->num_timing_nodes;
-
-	/* Validate command line timing */
-	if ((display->cmdline_timing != NO_OVERRIDE) &&
-		(display->cmdline_timing >= timing_mode_count))
-		display->cmdline_timing = NO_OVERRIDE;
 
 	for (mode_idx = 0; mode_idx < timing_mode_count; mode_idx++) {
 		struct dsi_display_mode display_mode;
@@ -7038,7 +6995,8 @@ int dsi_display_get_modes(struct dsi_display *display,
 		if (rc) {
 			DSI_ERR("[%s] failed to get mode idx %d from panel\n",
 				   display->name, mode_idx);
-			goto error;
+			rc = -EINVAL;
+			return rc;
 		}
 
 		if (display->cmdline_timing == display_mode.mode_idx) {
@@ -7104,7 +7062,7 @@ int dsi_display_get_modes(struct dsi_display *display,
 			if (!sub_mode) {
 				DSI_ERR("invalid mode data\n");
 				rc = -EFAULT;
-				goto error;
+				return rc;
 			}
 
 			memcpy(sub_mode, &display_mode, sizeof(display_mode));
@@ -7130,14 +7088,14 @@ int dsi_display_get_modes(struct dsi_display *display,
 					sizeof(*sub_mode->priv_info), GFP_KERNEL);
 			if (!sub_mode->priv_info) {
 				rc = -ENOMEM;
-				goto error;
+				return rc;
 			}
 
 			rc = dsi_display_mode_dyn_clk_cpy(display,
 					&display_mode, sub_mode);
 			if (rc) {
 				DSI_ERR("unable to copy dyn clock list\n");
-				goto error;
+				return rc;
 			}
 
 			sub_mode->mode_idx += (array_idx - 1);
@@ -7178,6 +7136,63 @@ int dsi_display_get_modes(struct dsi_display *display,
 	if (dsc_modes && nondsc_modes)
 		display->panel->dsc_switch_supported = true;
 
+	return rc;
+}
+
+int dsi_display_get_modes(struct dsi_display *display,
+			  struct dsi_display_mode **out_modes)
+{
+	struct dsi_dfps_capabilities dfps_caps;
+	struct dsi_display_ctrl *ctrl;
+	u32 timing_mode_count, display_mode_count;
+	struct dsi_dyn_clk_caps *dyn_clk_caps;
+	int rc = -EINVAL;
+	struct dsi_qsync_capabilities *qsync_caps;
+
+	if (!display || !out_modes) {
+		DSI_ERR("Invalid params\n");
+		return -EINVAL;
+	}
+
+	*out_modes = NULL;
+	ctrl = &display->ctrl[0];
+
+	mutex_lock(&display->display_lock);
+
+	if (display->modes)
+		goto exit;
+
+	display_mode_count = display->panel->num_display_modes;
+
+	display->modes = kcalloc(display_mode_count, sizeof(*display->modes),
+			GFP_KERNEL);
+	if (!display->modes) {
+		rc = -ENOMEM;
+		goto error;
+	}
+
+	rc = dsi_panel_get_dfps_caps(display->panel, &dfps_caps);
+	if (rc) {
+		DSI_ERR("[%s] failed to get dfps caps from panel\n",
+				display->name);
+		goto error;
+	}
+
+	qsync_caps = &(display->panel->qsync_caps);
+	dyn_clk_caps = &(display->panel->dyn_clk_caps);
+
+	timing_mode_count = display->panel->num_timing_nodes;
+
+	/* Validate command line timing */
+	if ((display->cmdline_timing != NO_OVERRIDE) &&
+		(display->cmdline_timing >= timing_mode_count))
+		display->cmdline_timing = NO_OVERRIDE;
+
+	rc = dsi_display_get_modes_helper(display, ctrl, timing_mode_count,
+			dfps_caps, qsync_caps, dyn_clk_caps);
+	if (rc)
+		goto error;
+
 exit:
 	*out_modes = display->modes;
 	rc = 0;