Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Pratyush Yadav <p.yadav@ti.com>
To:     Vinod Koul <vkoul@kernel.org>
CC:     Nikhil Devshatwar <nikhil.nd@ti.com>,
        Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Pratyush Yadav <p.yadav@ti.com>,
        Kishon Vijay Abraham I <kishon@ti.com>,
        <linux-kernel@vger.kernel.org>, <linux-phy@lists.infradead.org>
Subject: [PATCH v3 1/7] phy: Distinguish between Rx and Tx for MIPI D-PHY with submodes
Date:   Fri, 25 Jun 2021 00:11:02 +0530
Message-ID: <20210624184108.21312-2-p.yadav@ti.com>
In-Reply-To: <20210624184108.21312-1-p.yadav@ti.com>
References: <20210624184108.21312-1-p.yadav@ti.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
Precedence: bulk

From: Paul Kocialkowski <paul.kocialkowski@bootlin.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@bootlin.com>
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
---

(no changes since v1)

 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