disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/drm/bridge/adv7511/adv7533.c
..
..
@@ -1,14 +1,6 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
2
3
  * Copyright (c) 2016, The Linux Foundation. All rights reserved.
3
- *
4
- * This program is free software; you can redistribute it and/or modify
5
- * it under the terms of the GNU General Public License version 2 and
6
- * only version 2 as published by the Free Software Foundation.
7
- *
8
- * This program is distributed in the hope that it will be useful,
9
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
10
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11
- * GNU General Public License for more details.
12
4
  */
13
5
 
14
6
 #include <linux/of_graph.h>
..
..
@@ -108,26 +100,24 @@
108
100
 	regmap_write(adv->regmap_cec, 0x27, 0x0b);
109
101
 }
110
102
 
111
-void adv7533_mode_set(struct adv7511 *adv, struct drm_display_mode *mode)
103
+enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv,
104
+					const struct drm_display_mode *mode)
112
105
 {
106
+	unsigned long max_lane_freq;
113
107
 	struct mipi_dsi_device *dsi = adv->dsi;
114
-	int lanes, ret;
108
+	u8 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
115
109
 
116
-	if (adv->num_dsi_lanes != 4)
117
-		return;
110
+	/* Check max clock for either 7533 or 7535 */
111
+	if (mode->clock > (adv->type == ADV7533 ? 80000 : 148500))
112
+		return MODE_CLOCK_HIGH;
118
113
 
119
-	if (mode->clock > 80000)
120
-		lanes = 4;
121
-	else
122
-		lanes = 3;
114
+	/* Check max clock for each lane */
115
+	max_lane_freq = (adv->type == ADV7533 ? 800000 : 891000);
123
116
 
124
-	if (lanes != dsi->lanes) {
125
-		mipi_dsi_detach(dsi);
126
-		dsi->lanes = lanes;
127
-		ret = mipi_dsi_attach(dsi);
128
-		if (ret)
129
-			dev_err(&dsi->dev, "failed to change host lanes\n");
130
-	}
117
+	if (mode->clock * bpp > max_lane_freq * adv->num_dsi_lanes)
118
+		return MODE_CLOCK_HIGH;
119
+
120
+	return MODE_OK;
131
121
 }
132
122
 
133
123
 int adv7533_patch_registers(struct adv7511 *adv)