From 3fd7664319874fe291ce0ac08bc7056906fffe36 Mon Sep 17 00:00:00 2001
From: Yaroslav Bolyukin <iam@lach.pw>
Date: Sun, 23 Jan 2022 22:19:55 +0300
Subject: drm/edid: Support type 7 timings
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Git-commit: 80ecb5d7c0f224218fdf956faec0ebe73d79f53d
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

Per VESA DisplayID Standard v2.0: Type VII Timing – Detailed Timing Data

Definitions were already provided as type I, but not used

Signed-off-by: Yaroslav Bolyukin <iam@lach.pw>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220123191955.57994-1-iam@lach.pw
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/drm_edid.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 825e7580940f..3b7041fc9cdf 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5433,7 +5433,8 @@ u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edi
 }
 
 static struct drm_display_mode *drm_mode_displayid_detailed(struct drm_device *dev,
-							    struct displayid_detailed_timings_1 *timings)
+							    struct displayid_detailed_timings_1 *timings,
+							    bool type_7)
 {
 	struct drm_display_mode *mode;
 	unsigned pixel_clock = (timings->pixel_clock[0] |
@@ -5454,7 +5455,8 @@ static struct drm_display_mode *drm_mode_displayid_detailed(struct drm_device *d
 	if (!mode)
 		return NULL;
 
-	mode->clock = pixel_clock * 10;
+	/* resolution is kHz for type VII, and 10 kHz for type I */
+	mode->clock = type_7 ? pixel_clock : pixel_clock * 10;
 	mode->hdisplay = hactive;
 	mode->hsync_start = mode->hdisplay + hsync;
 	mode->hsync_end = mode->hsync_start + hsync_width;
@@ -5485,6 +5487,7 @@ static int add_displayid_detailed_1_modes(struct drm_connector *connector,
 	int num_timings;
 	struct drm_display_mode *newmode;
 	int num_modes = 0;
+	bool type_7 = block->tag == DATA_BLOCK_2_TYPE_7_DETAILED_TIMING;
 	/* blocks must be multiple of 20 bytes length */
 	if (block->num_bytes % 20)
 		return 0;
@@ -5493,7 +5496,7 @@ static int add_displayid_detailed_1_modes(struct drm_connector *connector,
 	for (i = 0; i < num_timings; i++) {
 		struct displayid_detailed_timings_1 *timings = &det->timings[i];
 
-		newmode = drm_mode_displayid_detailed(connector->dev, timings);
+		newmode = drm_mode_displayid_detailed(connector->dev, timings, type_7);
 		if (!newmode)
 			continue;
 
@@ -5512,7 +5515,8 @@ static int add_displayid_detailed_modes(struct drm_connector *connector,
 
 	displayid_iter_edid_begin(edid, &iter);
 	displayid_iter_for_each(block, &iter) {
-		if (block->tag == DATA_BLOCK_TYPE_1_DETAILED_TIMING)
+		if (block->tag == DATA_BLOCK_TYPE_1_DETAILED_TIMING ||
+		    block->tag == DATA_BLOCK_2_TYPE_7_DETAILED_TIMING)
 			num_modes += add_displayid_detailed_1_modes(connector, block);
 	}
 	displayid_iter_end(&iter);
-- 
2.38.1