linux-kernel - [PATCH v2 20/23] drm/omap: panel-tpo-td043mtea1: Add note for incorrect sync drive edge

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20160922110708.31242-21-peter.ujfalusi@ti.com>
Date:   Thu, 22 Sep 2016 14:07:05 +0300
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     <tomi.valkeinen@...com>, <thierry.reding@...il.com>,
        <airlied@...ux.ie>
CC:     <daniel.vetter@...ll.ch>, <dri-devel@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 20/23] drm/omap: panel-tpo-td043mtea1: Add note for incorrect sync drive edge

According to the datasheet of the panel, both data, DEN and sync signals
are expected to be driven on the falling edge of the DOTCLK.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
---
 drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c
index f78102aab2e6..0787dba44faa 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c
@@ -89,6 +89,10 @@ static const struct videomode tpo_td043_vm = {
 	.flags		= DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
 			  DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_POSEDGE |
 			  DISPLAY_FLAGS_PIXDATA_NEGEDGE,
+	/*
+	 * Note: According to the panel documentation:
+	 * SYNC needs to be driven on the FALLING edge
+	 */
 };
 
 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
-- 
2.10.0