[PATCH v5 02/16] phy: Distinguish between Rx and Tx for MIPI D-PHY with submodes
From: Paul Kocialkowski <hidden>
Date: 2021-01-15 20:04:40
Also in:
linux-arm-kernel, linux-doc, linux-media, lkml
Subsystem:
arm/rockchip soc support, generic phy framework, media input infrastructure (v4l/dvb), the rest · Maintainers:
Heiko Stuebner, Vinod Koul, Mauro Carvalho Chehab, Linus Torvalds
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 <redacted> Acked-by: Helen Koike <redacted> --- drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c | 3 ++- include/linux/phy/phy-mipi-dphy.h | 13 +++++++++++++ 2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
index 2e5b57e3aedc..cab261644102 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c@@ -948,7 +948,8 @@ static int rkisp1_mipi_csi2_start(struct rkisp1_isp *isp, phy_mipi_dphy_get_default_config(pixel_clock, isp->sink_fmt->bus_width, sensor->lanes, cfg); - phy_set_mode(sensor->dphy, PHY_MODE_MIPI_DPHY); + phy_set_mode_ext(cdev->dphy, PHY_MODE_MIPI_DPHY, + PHY_MIPI_DPHY_SUBMODE_RX); phy_configure(sensor->dphy, &opts); phy_power_on(sensor->dphy);
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