linux-kernel - [PATCH 25/26] drm/omap: panel-sharp-ls037v7dw01: Add note for incorrect data drive edge

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Message-ID: <20160901112320.15246-26-peter.ujfalusi@ti.com>
Date:   Thu, 1 Sep 2016 14:23:19 +0300
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     <thierry.reding@...il.com>, <airlied@...ux.ie>,
        <tomi.valkeinen@...com>
CC:     <daniel.vetter@...ll.ch>, <dri-devel@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 25/26] drm/omap: panel-sharp-ls037v7dw01: Add note for incorrect data 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-sharp-ls037v7dw01.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c b/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
index fd33156bc34c..04fe235b7cac 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
@@ -52,6 +52,10 @@ static const struct videomode sharp_ls_vm = {
 	.flags		= DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
 			  DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_NEGEDGE |
 			  DISPLAY_FLAGS_PIXDATA_POSEDGE,
+	/*
+	 * Note: According to the panel documentation:
+	 * DATA needs to be driven on the FALLING edge
+	 */
 };
 
 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
-- 
2.9.3