[PATCH v3 1/2] DRM: ARC: add HDMI 2.0 TX encoder support

From: Eugeniy Paltsev
Date: Tue Apr 14 2020 - 19:29:58 EST

The Synopsys ARC SoCs (like HSDK4xD) include on-chip DesignWare HDMI
encoders. Support them with a platform driver to provide platform glue
data to the dw-hdmi driver.

Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
---
MAINTAINERS | 6 ++
drivers/gpu/drm/Makefile | 2 +-
drivers/gpu/drm/arc/Kconfig | 7 ++
drivers/gpu/drm/arc/Makefile | 1 +
drivers/gpu/drm/arc/arc-dw-hdmi.c | 116 ++++++++++++++++++++++++++++++
5 files changed, 131 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/arc/arc-dw-hdmi.c

diff --git a/MAINTAINERS b/MAINTAINERS
index a6fbdf354d34..2aaed1190370 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1258,6 +1258,12 @@ S: Supported
F: drivers/gpu/drm/arc/
F: Documentation/devicetree/bindings/display/snps,arcpgu.txt

+ARC DW HDMI DRIVER
+M: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
+S: Supported
+F: drivers/gpu/drm/arc/arc-dw-hdmi.c
+F: Documentation/devicetree/bindings/display/bridge/snps,arc-dw-hdmi.yaml
+
ARCNET NETWORK LAYER
M: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
L: netdev@xxxxxxxxxxxxxxx
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 6493088a0fdd..5b0bcf7f45cd 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -109,7 +109,7 @@ obj-y += panel/
obj-y += bridge/
obj-$(CONFIG_DRM_FSL_DCU) += fsl-dcu/
obj-$(CONFIG_DRM_ETNAVIV) += etnaviv/
-obj-$(CONFIG_DRM_ARCPGU)+= arc/
+obj-y += arc/
obj-y += hisilicon/
obj-$(CONFIG_DRM_ZTE) += zte/
obj-$(CONFIG_DRM_MXSFB) += mxsfb/
diff --git a/drivers/gpu/drm/arc/Kconfig b/drivers/gpu/drm/arc/Kconfig
index e8f3d63e0b91..baec9d2a4fba 100644
--- a/drivers/gpu/drm/arc/Kconfig
+++ b/drivers/gpu/drm/arc/Kconfig
@@ -8,3 +8,10 @@ config DRM_ARCPGU
Choose this option if you have an ARC PGU controller.

If M is selected the module will be called arcpgu.
+
+config DRM_ARC_DW_HDMI
+ tristate "ARC DW HDMI"
+ depends on DRM && OF
+ select DRM_DW_HDMI
+ help
+ Synopsys DW HDMI driver for various ARC development boards
diff --git a/drivers/gpu/drm/arc/Makefile b/drivers/gpu/drm/arc/Makefile
index c7028b7427b3..7a156d8c2c3c 100644
--- a/drivers/gpu/drm/arc/Makefile
+++ b/drivers/gpu/drm/arc/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
arcpgu-y := arcpgu_crtc.o arcpgu_hdmi.o arcpgu_sim.o arcpgu_drv.o
obj-$(CONFIG_DRM_ARCPGU) += arcpgu.o
+obj-$(CONFIG_DRM_ARC_DW_HDMI) += arc-dw-hdmi.o
diff --git a/drivers/gpu/drm/arc/arc-dw-hdmi.c b/drivers/gpu/drm/arc/arc-dw-hdmi.c
new file mode 100644
index 000000000000..46a6ee09b302
--- /dev/null
+++ b/drivers/gpu/drm/arc/arc-dw-hdmi.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Synopsys DW HDMI driver for various ARC development boards
+//
+// Copyright (C) 2020 Synopsys
+// Author: Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_encoder_slave.h>
+#include <drm/drm_of.h>
+
+static const struct dw_hdmi_mpll_config snps_hdmi_mpll_cfg[] = {
+ {
+ 27000000, {
+ { 0x00B3, 0x0000 },
+ { 0x00B3, 0x0000 },
+ { 0x00B3, 0x0000 }
+ },
+ }, {
+ 74250000, {
+ { 0x0072, 0x0001},
+ { 0x0072, 0x0001},
+ { 0x0072, 0x0001}
+ },
+ }, {
+ 148500000, {
+ { 0x0051, 0x0002},
+ { 0x0051, 0x0002},
+ { 0x0051, 0x0002}
+ },
+ }, {
+ ~0UL, {
+ { 0x00B3, 0x0000 },
+ { 0x00B3, 0x0000 },
+ { 0x00B3, 0x0000 },
+ },
+ }
+};
+
+static const struct dw_hdmi_curr_ctrl snps_hdmi_cur_ctr[] = {
+ /* pixelclk bpp8 bpp10 bpp12 */
+ { 27000000, { 0x0000, 0x0000, 0x0000 }, },
+ { 74250000, { 0x0008, 0x0008, 0x0008 }, },
+ { 148500000, { 0x001b, 0x001b, 0x001b }, },
+ { ~0UL, { 0x0000, 0x0000, 0x0000 }, }
+};
+
+
+static const struct dw_hdmi_phy_config snps_hdmi_phy_config[] = {
+ /* pixelclk symbol term vlev */
+ { 27000000, 0x8009, 0x0004, 0x0232},
+ { 74250000, 0x8009, 0x0004, 0x0232},
+ { 148500000, 0x8009, 0x0004, 0x0232},
+ { ~0UL, 0x8009, 0x0004, 0x0232}
+};
+
+static struct dw_hdmi_plat_data snps_dw_hdmi_drv_data = {
+ .mpll_cfg = snps_hdmi_mpll_cfg,
+ .cur_ctr = snps_hdmi_cur_ctr,
+ .phy_config = snps_hdmi_phy_config,
+};
+
+static const struct of_device_id snps_dw_hdmi_dt_ids[] = {
+ { .compatible = "snps,arc-dw-hdmi-hsdk", .data = &snps_dw_hdmi_drv_data },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, snps_dw_hdmi_dt_ids);
+
+static int snps_dw_hdmi_probe(struct platform_device *pdev)
+{
+ const struct dw_hdmi_plat_data *plat_data;
+ const struct of_device_id *match;
+ struct dw_hdmi *hdmi;
+
+ if (!pdev->dev.of_node)
+ return -ENODEV;
+
+ match = of_match_node(snps_dw_hdmi_dt_ids, pdev->dev.of_node);
+ plat_data = match->data;
+
+ hdmi = dw_hdmi_probe(pdev, plat_data);
+ if (IS_ERR(hdmi))
+ return PTR_ERR(hdmi);
+
+ platform_set_drvdata(pdev, hdmi);
+
+ return 0;
+}
+
+static int snps_dw_hdmi_remove(struct platform_device *pdev)
+{
+ struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
+
+ dw_hdmi_remove(hdmi);
+
+ return 0;
+}
+
+static struct platform_driver snps_dw_hdmi_platform_driver = {
+ .probe = snps_dw_hdmi_probe,
+ .remove = snps_dw_hdmi_remove,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .of_match_table = snps_dw_hdmi_dt_ids,
+ },
+};
+module_platform_driver(snps_dw_hdmi_platform_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ARC specific DW-HDMI driver extension");
+MODULE_AUTHOR("Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx>");
--
2.21.1