linux-kernel - [PATCH v3 2/3] drm/bridge: ti-sn65dsi86: Implement bridge connector operations

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Date:   Thu, 10 Mar 2022 15:22:26 +0000
From:   Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
To:     dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        Sam Ravnborg <sam@...nborg.org>,
        Douglas Anderson <dianders@...omium.org>,
        linux-kernel@...r.kernel.org
Cc:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
Subject: [PATCH v3 2/3] drm/bridge: ti-sn65dsi86: Implement bridge connector operations

From: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>

Implement the bridge connector-related .get_edid() operation, and report
the related bridge capabilities and type.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
---
Changes since v1:

- The connector .get_modes() operation doesn't rely on EDID anymore,
  __ti_sn_bridge_get_edid() and ti_sn_bridge_get_edid() got merged
  together
 - Fix on top of Sam Ravnborg's DRM_BRIDGE_STATE_OPS

Changes since v2: [Kieran]
 - Only support EDID on DRM_MODE_CONNECTOR_DisplayPort modes.

 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 93b54fcba8ba..d581c820e5d8 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -1135,10 +1135,24 @@ static void ti_sn_bridge_atomic_post_disable(struct drm_bridge *bridge,
 	pm_runtime_put_sync(pdata->dev);
 }
 
+static struct edid *ti_sn_bridge_get_edid(struct drm_bridge *bridge,
+					  struct drm_connector *connector)
+{
+	struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
+	struct edid *edid;
+
+	pm_runtime_get_sync(pdata->dev);
+	edid = drm_get_edid(connector, &pdata->aux.ddc);
+	pm_runtime_put_autosuspend(pdata->dev);
+
+	return edid;
+}
+
 static const struct drm_bridge_funcs ti_sn_bridge_funcs = {
 	.attach = ti_sn_bridge_attach,
 	.detach = ti_sn_bridge_detach,
 	.mode_valid = ti_sn_bridge_mode_valid,
+	.get_edid = ti_sn_bridge_get_edid,
 	.atomic_pre_enable = ti_sn_bridge_atomic_pre_enable,
 	.atomic_enable = ti_sn_bridge_atomic_enable,
 	.atomic_disable = ti_sn_bridge_atomic_disable,
@@ -1233,6 +1247,9 @@ static int ti_sn_bridge_probe(struct auxiliary_device *adev,
 	pdata->bridge.type = pdata->next_bridge->type == DRM_MODE_CONNECTOR_DisplayPort
 			   ? DRM_MODE_CONNECTOR_DisplayPort : DRM_MODE_CONNECTOR_eDP;
 
+	if (pdata->bridge.type == DRM_MODE_CONNECTOR_DisplayPort)
+		pdata->bridge.ops = DRM_BRIDGE_OP_EDID;
+
 	drm_bridge_add(&pdata->bridge);
 
 	ret = ti_sn_attach_host(pdata);
-- 
2.32.0