kumquat-buildroot/board/chromebook/elm/patches/linux/0002-drm-bridge-ps8640-Get-the-EDID-from-eDP-control.patch

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From cc0f2fea61fb34ca84e4812a615e0035d812aa8b Mon Sep 17 00:00:00 2001
From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Date: Wed, 26 Aug 2020 10:15:23 +0200
Subject: [PATCH 2/5] drm/bridge: ps8640: Get the EDID from eDP control
The PS8640 DSI-to-eDP bridge can retrieve the EDID, so implement the
.get_edid callback and set the flag to indicate the core to use it.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
---
drivers/gpu/drm/bridge/parade-ps8640.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
index 4b099196afeb..13755d278db6 100644
--- a/drivers/gpu/drm/bridge/parade-ps8640.c
+++ b/drivers/gpu/drm/bridge/parade-ps8640.c
@@ -242,8 +242,18 @@ static int ps8640_bridge_attach(struct drm_bridge *bridge,
return ret;
}
+static struct edid *ps8640_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct ps8640 *ps_bridge = bridge_to_ps8640(bridge);
+
+ return drm_get_edid(connector,
+ ps_bridge->page[PAGE0_DP_CNTL]->adapter);
+}
+
static const struct drm_bridge_funcs ps8640_bridge_funcs = {
.attach = ps8640_bridge_attach,
+ .get_edid = ps8640_bridge_get_edid,
.post_disable = ps8640_post_disable,
.pre_enable = ps8640_pre_enable,
};
@@ -294,6 +304,8 @@ static int ps8640_probe(struct i2c_client *client)
ps_bridge->bridge.funcs = &ps8640_bridge_funcs;
ps_bridge->bridge.of_node = dev->of_node;
+ ps_bridge->bridge.ops = DRM_BRIDGE_OP_EDID;
+ ps_bridge->bridge.type = DRM_MODE_CONNECTOR_eDP;
ps_bridge->page[PAGE0_DP_CNTL] = client;
--
2.25.1