Add j721e wrapper for mhdp, which sets up the clock and data muxes.
Signed-off-by: Yuti Amonkar yamonkar@cadence.com --- drivers/gpu/drm/bridge/Kconfig | 12 ++++ drivers/gpu/drm/bridge/Makefile | 3 + drivers/gpu/drm/bridge/cdns-mhdp-core.c | 14 +++++ drivers/gpu/drm/bridge/cdns-mhdp-core.h | 1 + drivers/gpu/drm/bridge/cdns-mhdp-j721e.c | 79 ++++++++++++++++++++++++ drivers/gpu/drm/bridge/cdns-mhdp-j721e.h | 55 +++++++++++++++++ 6 files changed, 164 insertions(+) create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp-j721e.c create mode 100644 drivers/gpu/drm/bridge/cdns-mhdp-j721e.h
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index c66f2ef04f71..32e3bc5edae8 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -38,6 +38,18 @@ config DRM_CDNS_MHDP It takes a DPI stream as input and output it encoded in DP format.
+if DRM_CDNS_MHDP + +config DRM_CDNS_MHDP_J721E + bool "J721E Cadence DPI/DP wrapper support" + default y + help + Support J721E Cadence DPI/DP wrapper. This is a wrapper + which adds support for J721E related platform ops. It + initializes the J721e Display Port and sets up the + clock and data muxes. +endif + config DRM_DUMB_VGA_DAC tristate "Dumb VGA DAC Bridge support" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index 71019088d257..7e6c64f9021f 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -21,3 +21,6 @@ obj-y += analogix/ obj-y += synopsys/
cdns-mhdp-objs := cdns-mhdp-core.o +ifeq ($(CONFIG_DRM_CDNS_MHDP_J721E),y) + cdns-mhdp-objs += cdns-mhdp-j721e.o +endif diff --git a/drivers/gpu/drm/bridge/cdns-mhdp-core.c b/drivers/gpu/drm/bridge/cdns-mhdp-core.c index 51ed9cdee161..8483b6b1023b 100644 --- a/drivers/gpu/drm/bridge/cdns-mhdp-core.c +++ b/drivers/gpu/drm/bridge/cdns-mhdp-core.c @@ -36,8 +36,22 @@
#include "cdns-mhdp-core.h"
+#include "cdns-mhdp-j721e.h" + +#ifdef CONFIG_DRM_CDNS_MHDP_J721E +static const struct mhdp_platform_ops mhdp_ti_j721e_ops = { + .init = cdns_mhdp_j721e_init, + .exit = cdns_mhdp_j721e_fini, + .enable = cdns_mhdp_j721e_enable, + .disable = cdns_mhdp_j721e_disable, +}; +#endif + static const struct of_device_id mhdp_ids[] = { { .compatible = "cdns,mhdp8546", }, +#ifdef CONFIG_DRM_CDNS_MHDP_J721E + { .compatible = "ti,j721e-mhdp8546", .data = &mhdp_ti_j721e_ops }, +#endif { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mhdp_ids); diff --git a/drivers/gpu/drm/bridge/cdns-mhdp-core.h b/drivers/gpu/drm/bridge/cdns-mhdp-core.h index 2f3b67987832..67a99eab5db3 100644 --- a/drivers/gpu/drm/bridge/cdns-mhdp-core.h +++ b/drivers/gpu/drm/bridge/cdns-mhdp-core.h @@ -335,6 +335,7 @@ struct mhdp_platform_ops {
struct cdns_mhdp_device { void __iomem *regs; + void __iomem *j721e_regs;
struct device *dev; struct clk *clk; diff --git a/drivers/gpu/drm/bridge/cdns-mhdp-j721e.c b/drivers/gpu/drm/bridge/cdns-mhdp-j721e.c new file mode 100644 index 000000000000..a87faf55c065 --- /dev/null +++ b/drivers/gpu/drm/bridge/cdns-mhdp-j721e.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * TI j721e Cadence MHDP DP wrapper + * + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Jyri Sarha <jsarha@ti.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/device.h> +#include <linux/io.h> + +#include "cdns-mhdp-j721e.h" + +#define REVISION 0x00 +#define DPTX_IPCFG 0x04 +#define ECC_MEM_CFG 0x08 +#define DPTX_DSC_CFG 0x0c +#define DPTX_SRC_CFG 0x10 +#define DPTX_VIF_SECURE_MODE_CFG 0x14 +#define DPTX_VIF_CONN_STATUS 0x18 +#define PHY_CLK_STATUS 0x1c + +#define DPTX_SRC_AIF_EN BIT(16) +#define DPTX_SRC_VIF_3_IN30B BIT(11) +#define DPTX_SRC_VIF_2_IN30B BIT(10) +#define DPTX_SRC_VIF_1_IN30B BIT(9) +#define DPTX_SRC_VIF_0_IN30B BIT(8) +#define DPTX_SRC_VIF_3_SEL_DPI5 BIT(7) +#define DPTX_SRC_VIF_3_SEL_DPI3 0 +#define DPTX_SRC_VIF_2_SEL_DPI4 BIT(6) +#define DPTX_SRC_VIF_2_SEL_DPI2 0 +#define DPTX_SRC_VIF_1_SEL_DPI3 BIT(5) +#define DPTX_SRC_VIF_1_SEL_DPI1 0 +#define DPTX_SRC_VIF_0_SEL_DPI2 BIT(4) +#define DPTX_SRC_VIF_0_SEL_DPI0 0 +#define DPTX_SRC_VIF_3_EN BIT(3) +#define DPTX_SRC_VIF_2_EN BIT(2) +#define DPTX_SRC_VIF_1_EN BIT(1) +#define DPTX_SRC_VIF_0_EN BIT(0) + +/* TODO turn DPTX_IPCFG fw_mem_clk_en at pm_runtime_suspend. */ + +int cdns_mhdp_j721e_init(struct cdns_mhdp_device *mhdp) +{ + struct platform_device *pdev = to_platform_device(mhdp->dev); + struct resource *regs; + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 1); + mhdp->j721e_regs = devm_ioremap_resource(&pdev->dev, regs); + if (IS_ERR(mhdp->j721e_regs)) + return PTR_ERR(mhdp->j721e_regs); + + return 0; +} + +void cdns_mhdp_j721e_fini(struct cdns_mhdp_device *mhdp) +{ +} + +void cdns_mhdp_j721e_enable(struct cdns_mhdp_device *mhdp) +{ + /* + * Eneble VIF_0 and select DPI2 as its input. DSS0 DPI0 is connected + * to eDP DPI2. This is the only supported SST configuration on + * J721E. + */ + writel(DPTX_SRC_VIF_0_EN | DPTX_SRC_VIF_0_SEL_DPI2, + mhdp->j721e_regs + DPTX_SRC_CFG); +} + +void cdns_mhdp_j721e_disable(struct cdns_mhdp_device *mhdp) +{ + /* Put everything to defaults */ + writel(0, mhdp->j721e_regs + DPTX_DSC_CFG); +} diff --git a/drivers/gpu/drm/bridge/cdns-mhdp-j721e.h b/drivers/gpu/drm/bridge/cdns-mhdp-j721e.h new file mode 100644 index 000000000000..de0e4e82b58c --- /dev/null +++ b/drivers/gpu/drm/bridge/cdns-mhdp-j721e.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * TI j721e Cadence MHDP DP wrapper + * + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Jyri Sarha <jsarha@ti.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef CDNS_MHDP_J721E_H +#define CDNS_MHDP_J721E_H + +#include <linux/platform_device.h> +#include "cdns-mhdp-core.h" + +struct cdns_mhdp_j721e_wrap; + +#ifdef CONFIG_DRM_CDNS_MHDP_J721E + +int cdns_mhdp_j721e_init(struct cdns_mhdp_device *mhdp); + +void cdns_mhdp_j721e_fini(struct cdns_mhdp_device *mhdp); + +void cdns_mhdp_j721e_enable(struct cdns_mhdp_device *mhdp); + +void cdns_mhdp_j721e_disable(struct cdns_mhdp_device *mhdp); + +#else + +static inline +int cdns_mhdp_j721e_init(struct cdns_mhdp_device *mhdp) +{ + return 0; +} + +static inline +void cdns_mhdp_j721e_fini(struct cdns_mhdp_device *mhdp) +{ +} + +static inline +void cdns_mhdp_j721e_sst_enable(struct cdns_mhdp_device *mhdp); +{ +} + +static inline +void cdns_mhdp_j721e_sst_disable(struct cdns_mhdp_device *mhdp) +{ +} +#endif /* CONFIG_DRM_CDNS_MHDP_J721E */ + +#endif /* !CDNS_MHDP_J721E_H */