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Message-ID: <20210330173348.30135-2-p.yadav@ti.com>
Date: Tue, 30 Mar 2021 23:03:33 +0530
From: Pratyush Yadav <p.yadav@...com>
To: Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Kishon Vijay Abraham I <kishon@...com>,
Vinod Koul <vkoul@...nel.org>,
Peter Ujfalusi <peter.ujfalusi@...il.com>,
Maxime Ripard <mripard@...nel.org>,
Benoit Parrot <bparrot@...com>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
Alexandre Courbot <acourbot@...omium.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Stanimir Varbanov <stanimir.varbanov@...aro.org>,
Helen Koike <helen.koike@...labora.com>,
Michael Tretter <m.tretter@...gutronix.de>,
Peter Chen <peter.chen@....com>,
Chunfeng Yun <chunfeng.yun@...iatek.com>,
<linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
<dmaengine@...r.kernel.org>
CC: Pratyush Yadav <p.yadav@...com>,
Vignesh Raghavendra <vigneshr@...com>,
Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH 01/16] phy: Distinguish between Rx and Tx for MIPI D-PHY with submodes
From: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
As some D-PHY controllers support both Rx and Tx mode, we need a way for
users to explicitly request one or the other. For instance, Rx mode can
be used along with MIPI CSI-2 while Tx mode can be used with MIPI DSI.
Introduce new MIPI D-PHY PHY submodes to use with PHY_MODE_MIPI_DPHY.
The default (zero value) is kept to Tx so only the rkisp1 driver, which
uses D-PHY in Rx mode, needs to be adapted.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Signed-off-by: Pratyush Yadav <p.yadav@...com>
---
include/linux/phy/phy-mipi-dphy.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/linux/phy/phy-mipi-dphy.h b/include/linux/phy/phy-mipi-dphy.h
index a877ffee845d..0f57ef46a8b5 100644
--- a/include/linux/phy/phy-mipi-dphy.h
+++ b/include/linux/phy/phy-mipi-dphy.h
@@ -6,6 +6,19 @@
#ifndef __PHY_MIPI_DPHY_H_
#define __PHY_MIPI_DPHY_H_
+/**
+ * enum phy_mipi_dphy_submode - MIPI D-PHY sub-mode
+ *
+ * A MIPI D-PHY can be used to transmit or receive data.
+ * Since some controllers can support both, the direction to enable is specified
+ * with the PHY sub-mode. Transmit is assumed by default with phy_set_mode.
+ */
+
+enum phy_mipi_dphy_submode {
+ PHY_MIPI_DPHY_SUBMODE_TX = 0,
+ PHY_MIPI_DPHY_SUBMODE_RX,
+};
+
/**
* struct phy_configure_opts_mipi_dphy - MIPI D-PHY configuration set
*
--
2.30.0
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