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Subject[PATCH v8 3/3] drm: bridge: cdns-mhdp: Add j721e wrapper
Date
Add j721e wrapper for mhdp, which sets up the clock and data muxes.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
Signed-off-by: Yuti Amonkar <yamonkar@cadence.com>
Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
drivers/gpu/drm/bridge/Kconfig | 13 +++++
drivers/gpu/drm/bridge/Makefile | 2 +
drivers/gpu/drm/bridge/cdns-mhdp-core.c | 15 +++++
drivers/gpu/drm/bridge/cdns-mhdp-core.h | 1 +
drivers/gpu/drm/bridge/cdns-mhdp-j721e.c | 72 ++++++++++++++++++++++++
drivers/gpu/drm/bridge/cdns-mhdp-j721e.h | 19 +++++++
6 files changed, 122 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 6a4c324302a8..8c1738653b7e 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -38,6 +38,19 @@ config DRM_CDNS_MHDP
It takes a DPI stream as input and outputs it encoded
in DP format.

+if DRM_CDNS_MHDP
+
+config DRM_CDNS_MHDP_J721E
+ depends on ARCH_K3_J721E_SOC
+ 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_CHRONTEL_CH7033
tristate "Chrontel CH7033 Video Encoder"
depends on OF
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index 7046bf077603..be92ebf620b6 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -2,6 +2,8 @@
obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o
obj-$(CONFIG_DRM_CDNS_MHDP) += cdns-mhdp.o
cdns-mhdp-y := cdns-mhdp-core.o
+cdns-mhdp-$(CONFIG_DRM_CDNS_MHDP_J721E) += cdns-mhdp-j721e.o
+
obj-$(CONFIG_DRM_CHRONTEL_CH7033) += chrontel-ch7033.o
obj-$(CONFIG_DRM_DISPLAY_CONNECTOR) += display-connector.o
obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o
diff --git a/drivers/gpu/drm/bridge/cdns-mhdp-core.c b/drivers/gpu/drm/bridge/cdns-mhdp-core.c
index d47187ab358b..53c25f6ecddf 100644
--- a/drivers/gpu/drm/bridge/cdns-mhdp-core.c
+++ b/drivers/gpu/drm/bridge/cdns-mhdp-core.c
@@ -42,6 +42,8 @@

#include "cdns-mhdp-core.h"

+#include "cdns-mhdp-j721e.h"
+
static DECLARE_WAIT_QUEUE_HEAD(fw_load_wq);

static int cdns_mhdp_mailbox_read(struct cdns_mhdp_device *mhdp)
@@ -1702,6 +1704,16 @@ static int cdns_mhdp_connector_init(struct cdns_mhdp_device *mhdp)

conn->display_info.bus_flags = DRM_BUS_FLAG_DE_HIGH;

+ if (of_device_is_compatible(mhdp->dev->of_node, "ti,j721e-mhdp8546"))
+ /*
+ * DP is internal to J7 SoC and we need to use DRIVE_POSEDGE
+ * in the display controller. This is achieved for the time being
+ * by defining SAMPLE_NEGEDGE here.
+ */
+ conn->display_info.bus_flags |=
+ DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
+ DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE;
+
ret = drm_connector_attach_encoder(conn, bridge->encoder);
if (ret) {
DRM_ERROR("Failed to attach connector to encoder\n");
@@ -2521,6 +2533,9 @@ static int cdns_mhdp_remove(struct platform_device *pdev)

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 bd97a7aeb28b..d40a0f8615a4 100644
--- a/drivers/gpu/drm/bridge/cdns-mhdp-core.h
+++ b/drivers/gpu/drm/bridge/cdns-mhdp-core.h
@@ -343,6 +343,7 @@ struct cdns_mhdp_bridge_state {

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..cc33c9afb5bb
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cdns-mhdp-j721e.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TI j721e Cadence MHDP DP wrapper
+ *
+ * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Jyri Sarha <jsarha@ti.com
+ */
+
+#include <linux/io.h>
+#include <linux/platform_device.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. */
+
+static int cdns_mhdp_j721e_init(struct cdns_mhdp_device *mhdp)
+{
+ struct platform_device *pdev = to_platform_device(mhdp->dev);
+
+ mhdp->j721e_regs = devm_platform_ioremap_resource(pdev, 1);
+ return PTR_ERR_OR_ZERO(mhdp->j721e_regs);
+}
+
+static 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);
+}
+
+static void cdns_mhdp_j721e_disable(struct cdns_mhdp_device *mhdp)
+{
+ /* Put everything to defaults */
+ writel(0, mhdp->j721e_regs + DPTX_DSC_CFG);
+}
+
+const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
+ .init = cdns_mhdp_j721e_init,
+ .enable = cdns_mhdp_j721e_enable,
+ .disable = cdns_mhdp_j721e_disable,
+};
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..7a4a1a269b5e
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cdns-mhdp-j721e.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * TI j721e Cadence MHDP DP wrapper
+ *
+ * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Jyri Sarha <jsarha@ti.com
+ */
+
+#ifndef CDNS_MHDP_J721E_H
+#define CDNS_MHDP_J721E_H
+
+#include <linux/platform_device.h>
+#include "cdns-mhdp-core.h"
+
+struct mhdp_platform_ops;
+
+extern const struct mhdp_platform_ops mhdp_ti_j721e_ops;
+
+#endif /* !CDNS_MHDP_J721E_H */
--
2.26.1
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