Commit 0d6d8625 authored by Heiko Stuebner's avatar Heiko Stuebner Committed by Heiko Stuebner
Browse files

drm/bridge/synopsys: Add MIPI DSI2 host controller bridge 



Add a Synopsys Designware MIPI DSI host DRM bridge driver for their
DSI2 host controller, based on the Rockchip version from the driver
rockchip/dw-mipi-dsi2.c in their vendor-kernel with phy & bridge APIs.

While the driver is heavily modelled after the previous IP, the register
set of this DSI2 controller is completely different and there are also
additional properties like the variable-width phy interface.

Tested-by: default avatarDaniel Semkowicz <dse@thaumatec.com>
Tested-by: default avatarDmitry Yashin <dmt.yashin@gmail.com>
Reviewed-by: default avatarNeil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: default avatarHeiko Stuebner <heiko.stuebner@cherry.de>
Reviewed-by: default avatarAndy Yan <andy.yan@rock-chips.com>
Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20241209231021.2180582-2-heiko@sntech.de
parent 8a4b913d

drivers/gpu/drm/bridge/synopsys/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -59,3 +59,9 @@ config DRM_DW_MIPI_DSI 
	select DRM_KMS_HELPER

	select DRM_MIPI_DSI

	select DRM_PANEL_BRIDGE



config DRM_DW_MIPI_DSI2

	tristate

	select DRM_KMS_HELPER

	select DRM_MIPI_DSI

	select DRM_PANEL_BRIDGE

drivers/gpu/drm/bridge/synopsys/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -8,3 +8,4 @@ obj-$(CONFIG_DRM_DW_HDMI_CEC) += dw-hdmi-cec.o 
obj-$(CONFIG_DRM_DW_HDMI_QP) += dw-hdmi-qp.o



obj-$(CONFIG_DRM_DW_MIPI_DSI) += dw-mipi-dsi.o

obj-$(CONFIG_DRM_DW_MIPI_DSI2) += dw-mipi-dsi2.o

drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi2.c

0 → 100644
+1030 −0

File added.

Preview size limit exceeded, changes collapsed.

include/drm/bridge/dw_mipi_dsi2.h

0 → 100644
+95 −0
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/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2024, Fuzhou Rockchip Electronics Co., Ltd

 *

 * Authors: Guochun Huang <hero.huang@rock-chips.com>

 *          Heiko Stuebner <heiko.stuebner@cherry.de>

 */



#ifndef __DW_MIPI_DSI2__

#define __DW_MIPI_DSI2__



#include <linux/regmap.h>

#include <linux/types.h>



#include <drm/drm_atomic.h>

#include <drm/drm_bridge.h>

#include <drm/drm_connector.h>

#include <drm/drm_crtc.h>

#include <drm/drm_modes.h>



struct drm_display_mode;

struct drm_encoder;

struct dw_mipi_dsi2;

struct mipi_dsi_device;

struct platform_device;



enum dw_mipi_dsi2_phy_type {

	DW_MIPI_DSI2_DPHY,

	DW_MIPI_DSI2_CPHY,

};



struct dw_mipi_dsi2_phy_iface {

	int ppi_width;

	enum dw_mipi_dsi2_phy_type phy_type;

};



struct dw_mipi_dsi2_phy_timing {

	u32 data_hs2lp;

	u32 data_lp2hs;

};



struct dw_mipi_dsi2_phy_ops {

	int (*init)(void *priv_data);

	void (*power_on)(void *priv_data);

	void (*power_off)(void *priv_data);

	void (*get_interface)(void *priv_data, struct dw_mipi_dsi2_phy_iface *iface);

	int (*get_lane_mbps)(void *priv_data,

			     const struct drm_display_mode *mode,

			     unsigned long mode_flags, u32 lanes, u32 format,

			     unsigned int *lane_mbps);

	int (*get_timing)(void *priv_data, unsigned int lane_mbps,

			  struct dw_mipi_dsi2_phy_timing *timing);

	int (*get_esc_clk_rate)(void *priv_data, unsigned int *esc_clk_rate);

};



struct dw_mipi_dsi2_host_ops {

	int (*attach)(void *priv_data,

		      struct mipi_dsi_device *dsi);

	int (*detach)(void *priv_data,

		      struct mipi_dsi_device *dsi);

};



struct dw_mipi_dsi2_plat_data {

	struct regmap *regmap;

	unsigned int max_data_lanes;



	enum drm_mode_status (*mode_valid)(void *priv_data,

					   const struct drm_display_mode *mode,

					   unsigned long mode_flags,

					   u32 lanes, u32 format);



	bool (*mode_fixup)(void *priv_data, const struct drm_display_mode *mode,

			   struct drm_display_mode *adjusted_mode);



	u32 *(*get_input_bus_fmts)(void *priv_data,

				   struct drm_bridge *bridge,

				   struct drm_bridge_state *bridge_state,

				   struct drm_crtc_state *crtc_state,

				   struct drm_connector_state *conn_state,

				   u32 output_fmt,

				   unsigned int *num_input_fmts);



	const struct dw_mipi_dsi2_phy_ops *phy_ops;

	const struct dw_mipi_dsi2_host_ops *host_ops;



	void *priv_data;

};



struct dw_mipi_dsi2 *dw_mipi_dsi2_probe(struct platform_device *pdev,

					const struct dw_mipi_dsi2_plat_data *plat_data);

void dw_mipi_dsi2_remove(struct dw_mipi_dsi2 *dsi2);

int dw_mipi_dsi2_bind(struct dw_mipi_dsi2 *dsi2, struct drm_encoder *encoder);

void dw_mipi_dsi2_unbind(struct dw_mipi_dsi2 *dsi2);



#endif /* __DW_MIPI_DSI2__ */