linux-kernel - [PATCH 3/6] drm/panel: simple: Add "no-hpd" delay for Innolux TV123WAM

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Message-Id: <20181022204639.8558-3-dianders@chromium.org>
Date:   Mon, 22 Oct 2018 13:46:36 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Sean Paul <seanpaul@...omium.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sandeep Panda <spanda@...eaurora.org>
Cc:     linux-arm-msm@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        jsanka@...eaurora.org, ryandcase@...omium.org,
        Douglas Anderson <dianders@...omium.org>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/6] drm/panel: simple: Add "no-hpd" delay for Innolux TV123WAM

If the HPD signal isn't hooked up to this panel we need a 200 ms
delay.  In the datasheet this is shown as the maximum time that HPD
will take to be asserted after power is given to the panel.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 drivers/gpu/drm/panel/panel-simple.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 38c646fb55fd..937e97490c30 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -1393,6 +1393,8 @@ static const struct panel_desc innolux_tv123wam = {
 		.height = 173,
 	},
 	.delay = {
+		.prepare = 200,
+		.prepare_delay_only_if_no_hpd = true,
 		.unprepare = 500,
 	},
 };
-- 
2.19.1.568.g152ad8e336-goog