linux-kernel - [PATCH] drm/panel: khadas-ts050: update timings to achieve 60Hz refresh rate

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Message-Id: <20221025-ts050-timings-v1-0-c95a60acf935@linaro.org>
Date:   Tue, 25 Oct 2022 17:41:45 +0200
From:   neil.armstrong@...aro.org
To:     Daniel Vetter <daniel@...ll.ch>, Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>
Cc:     Neil Armstrong <neil.armstrong@...aro.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH] drm/panel: khadas-ts050: update timings to achieve 60Hz refresh rate

From: Neil Armstrong <neil.armstrong@...aro.org>

This updates the panel timings to achieve a clean 60Hz refresh rate.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
To: Sam Ravnborg <sam@...nborg.org>
To: David Airlie <airlied@...il.com>
To: Daniel Vetter <daniel@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/gpu/drm/panel/panel-khadas-ts050.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-khadas-ts050.c b/drivers/gpu/drm/panel/panel-khadas-ts050.c
index 1ab1ebe30882..e0cebfa14b36 100644
--- a/drivers/gpu/drm/panel/panel-khadas-ts050.c
+++ b/drivers/gpu/drm/panel/panel-khadas-ts050.c
@@ -568,7 +568,7 @@ static const struct khadas_ts050_panel_cmd init_code[] = {
 	{0xfb, 0x01},
 	/* Select CMD1 */
 	{0xff, 0x00},
-	{0xd3, 0x05}, /* RGBMIPICTRL: VSYNC back porch = 5 */
+	{0xd3, 0x22}, /* RGBMIPICTRL: VSYNC back porch = 34 */
 	{0xd4, 0x04}, /* RGBMIPICTRL: VSYNC front porch = 4 */
 };
 
@@ -717,15 +717,15 @@ static int khadas_ts050_panel_disable(struct drm_panel *panel)
 }
 
 static const struct drm_display_mode default_mode = {
-	.clock = 120000,
-	.hdisplay = 1088,
-	.hsync_start = 1088 + 104,
-	.hsync_end = 1088 + 104 + 4,
-	.htotal = 1088 + 104 + 4 + 127,
+	.clock = 160000,
+	.hdisplay = 1080,
+	.hsync_start = 1080 + 117,
+	.hsync_end = 1080 + 117 + 5,
+	.htotal = 1080 + 117 + 5 + 160,
 	.vdisplay = 1920,
-	.vsync_start = 1920 + 4,
-	.vsync_end = 1920 + 4 + 2,
-	.vtotal = 1920 + 4 + 2 + 3,
+	.vsync_start = 1920 + 4 ,
+	.vsync_end = 1920 + 4 + 3,
+	.vtotal = 1920 + 4 + 3 + 31 ,
 	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
 };
 

---
base-commit: 247f34f7b80357943234f93f247a1ae6b6c3a740
change-id: 20221025-ts050-timings-2fb4b034a268

Best regards,
-- 
Neil Armstrong <neil.armstrong@...aro.org>