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55 lines
1.9 KiB
Diff
55 lines
1.9 KiB
Diff
From cb2aae713bb2448a1e7ac9c39b5714a4b56ffa99 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Fri, 3 Sep 2021 17:52:59 +0100
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Subject: [PATCH 509/634] drm/panel/raspberrypi-touchscreen: Initialise the
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bridge in prepare
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The panel has a prepare call which is before video starts, and an
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enable call which is after.
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The Toshiba bridge should be configured before video, so move
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the relevant power and initialisation calls to prepare.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 11 +++++++++--
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1 file changed, 9 insertions(+), 2 deletions(-)
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diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
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index f361cedac6ea..bd15c2f2e247 100644
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--- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
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+++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
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@@ -293,7 +293,7 @@ static int rpi_touchscreen_noop(struct drm_panel *panel)
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return 0;
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}
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-static int rpi_touchscreen_enable(struct drm_panel *panel)
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+static int rpi_touchscreen_prepare(struct drm_panel *panel)
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{
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struct rpi_touchscreen *ts = panel_to_ts(panel);
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int i;
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@@ -324,6 +324,13 @@ static int rpi_touchscreen_enable(struct drm_panel *panel)
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rpi_touchscreen_write(ts, DSI_STARTDSI, 0x01);
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msleep(100);
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+ return 0;
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+}
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+
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+static int rpi_touchscreen_enable(struct drm_panel *panel)
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+{
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+ struct rpi_touchscreen *ts = panel_to_ts(panel);
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+
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/* Turn on the backlight. */
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rpi_touchscreen_i2c_write(ts, REG_PWM, 255);
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@@ -378,7 +385,7 @@ static int rpi_touchscreen_get_modes(struct drm_panel *panel,
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static const struct drm_panel_funcs rpi_touchscreen_funcs = {
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.disable = rpi_touchscreen_disable,
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.unprepare = rpi_touchscreen_noop,
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- .prepare = rpi_touchscreen_noop,
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+ .prepare = rpi_touchscreen_prepare,
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.enable = rpi_touchscreen_enable,
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.get_modes = rpi_touchscreen_get_modes,
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};
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--
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2.33.1
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