linux-kernel - [PATCH v6 1/5] drm/bridge: nwl-dsi: Set PHY mode in nwl_dsi_mode

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Date:   Sat,  2 Apr 2022 12:03:21 +0800
From:   Liu Ying <victor.liu@....com>
To:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     kishon@...com, vkoul@...nel.org, robh+dt@...nel.org,
        a.hajda@...sung.com, narmstrong@...libre.com,
        Laurent.pinchart@...asonboard.com, jonas@...boo.se,
        jernej.skrabec@...l.net, airlied@...ux.ie, daniel@...ll.ch,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, agx@...xcpu.org,
        robert.chiras@....com, martin.kepplinger@...i.sm,
        robert.foss@...aro.org
Subject: [PATCH v6 1/5] drm/bridge: nwl-dsi: Set PHY mode in nwl_dsi_mode_set()

The Northwest Logic MIPI DSI host controller embedded in i.MX8qxp
works with a Mixel MIPI DPHY + LVDS PHY combo to support either
a MIPI DSI display or a LVDS display.  So, this patch calls
phy_set_mode() from nwl_dsi_mode_set() to set PHY mode to MIPI DPHY
explicitly.

Cc: Guido Günther <agx@...xcpu.org>
Cc: Robert Chiras <robert.chiras@....com>
Cc: Martin Kepplinger <martin.kepplinger@...i.sm>
Cc: Andrzej Hajda <a.hajda@...sung.com>
Cc: Neil Armstrong <narmstrong@...libre.com>
Cc: Laurent Pinchart <Laurent.pinchart@...asonboard.com>
Cc: Jonas Karlman <jonas@...boo.se>
Cc: Jernej Skrabec <jernej.skrabec@...l.net>
Cc: David Airlie <airlied@...ux.ie>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: NXP Linux Team <linux-imx@....com>
Signed-off-by: Liu Ying <victor.liu@....com>
---
v5->v6:
* Rebase the series upon v5.17-rc1.
* Set PHY mode in ->mode_set() instead of ->pre_enable() in the nwl-dsi
  bridge driver due to the rebase.
* Drop Guido's R-b tag due to the rebase.

v4->v5:
* No change.

v3->v4:
* No change.

v2->v3:
* No change.

v1->v2:
* Add Guido's R-b tag.

 drivers/gpu/drm/bridge/nwl-dsi.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c
index af07eeb47ca0..cbe3edb17ceb 100644
--- a/drivers/gpu/drm/bridge/nwl-dsi.c
+++ b/drivers/gpu/drm/bridge/nwl-dsi.c
@@ -671,6 +671,12 @@ static int nwl_dsi_mode_set(struct nwl_dsi *dsi)
 		return ret;
 	}
 
+	ret = phy_set_mode(dsi->phy, PHY_MODE_MIPI_DPHY);
+	if (ret < 0) {
+		DRM_DEV_ERROR(dev, "Failed to set DSI phy mode: %d\n", ret);
+		goto uninit_phy;
+	}
+
 	ret = phy_configure(dsi->phy, phy_cfg);
 	if (ret < 0) {
 		DRM_DEV_ERROR(dev, "Failed to configure DSI phy: %d\n", ret);
-- 
2.25.1