From: Koji Matsuoka <koji.matsuoka.xm@xxxxxxxxxxx>
The R-Car Gen3 SoCs include on-chip DesignWare HDMI encoders. Support
them with a platform driver to provide platform glue data to the dw-hdmi
driver.
The driver is a complete rewrite of code coming from the Renesas BSP,
save for the values in the PHY parameters table.
Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@xxxxxxxxxxx>
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@xxxxxxxxx>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/rcar-du/Kconfig | 8 +++
drivers/gpu/drm/rcar-du/Makefile | 1 +
drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c | 105 +++++++++++++++++++++++++++++++++
3 files changed, 114 insertions(+)
create mode 100644 drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index 06121eeba9e5..a356d2f2f6d6 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -11,6 +11,14 @@ config DRM_RCAR_DU
Choose this option if you have an R-Car chipset.
If M is selected the module will be called rcar-du-drm.
+config DRM_RCAR_DW_HDMI
+ bool "R-Car DU Gen3 HDMI Encoder Support"
+ depends on DRM_RCAR_DU
+ depends on OF
+ select DRM_DW_HDMI
+ help
+ Enable support for R-Car Gen3 internal HDMI encoder.
+
config DRM_RCAR_LVDS
bool "R-Car DU LVDS Encoder Support"
depends on DRM_RCAR_DU
diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index a492e6858691..2131e722de3b 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -11,3 +11,4 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_lvdsenc.o
rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o
obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o
+obj-$(CONFIG_DRM_RCAR_DW_HDMI) += rcar_dw_hdmi.o
diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
new file mode 100644
index 000000000000..1921d7aa6aed
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
@@ -0,0 +1,105 @@
+/*
+ * R-Car Gen3 HDMI PHY
+ *
+ * Copyright (C) 2016 Renesas Electronics Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@xxxxxxxxxxxxxxxx)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <drm/bridge/dw_hdmi.h>
+
+#define RCAR_HDMI_PHY_OPMODE_PLLCFG 0x06 /* Mode of operation and PLL dividers */
+#define RCAR_HDMI_PHY_PLLCURRGMPCTRL 0x10 /* PLL current and Gmp (conductance) */
+#define RCAR_HDMI_PHY_PLLDIVCTRL 0x11 /* PLL dividers */
+
+struct rcar_hdmi_phy_params {
+ unsigned long mpixelclock;
+ u16 opmode_div; /* Mode of operation and PLL dividers */
+ u16 curr_gmp; /* PLL current and Gmp (conductance) */
+ u16 div; /* PLL dividers */
+};
+
+static const struct rcar_hdmi_phy_params rcar_hdmi_phy_params[] = {
+ { 35500000, 0x0003, 0x0344, 0x0328 },
+ { 44900000, 0x0003, 0x0285, 0x0128 },
+ { 71000000, 0x0002, 0x1184, 0x0314 },
+ { 90000000, 0x0002, 0x1144, 0x0114 },
+ { 140250000, 0x0001, 0x20c4, 0x030a },
+ { 182750000, 0x0001, 0x2084, 0x010a },
+ { 281250000, 0x0000, 0x0084, 0x0305 },
+ { 297000000, 0x0000, 0x0084, 0x0105 },
+ { ~0UL, 0x0000, 0x0000, 0x0000 },
+};
+
+static int rcar_hdmi_phy_configure(struct dw_hdmi *hdmi,
+ const struct dw_hdmi_plat_data *pdata,
+ unsigned long mpixelclock,
+ enum dw_hdmi_resolution resolution)
+{
+ const struct rcar_hdmi_phy_params *params = rcar_hdmi_phy_params;
+
+ if (resolution != DW_HDMI_RES_8)
+ return -EINVAL;
+
+ for (; params && params->mpixelclock != ~0UL; ++params) {
+ if (mpixelclock <= params->mpixelclock)
+ break;
+ }
+
+ if (params->mpixelclock == ~0UL)
+ return -EINVAL;
+
+ dw_hdmi_phy_i2c_write(hdmi, params->opmode_div,
+ RCAR_HDMI_PHY_OPMODE_PLLCFG);
+ dw_hdmi_phy_i2c_write(hdmi, params->curr_gmp,
+ RCAR_HDMI_PHY_PLLCURRGMPCTRL);
+ dw_hdmi_phy_i2c_write(hdmi, params->div, RCAR_HDMI_PHY_PLLDIVCTRL);
+
+ return 0;
+}
+
+static const struct dw_hdmi_plat_data rcar_dw_hdmi_plat_data = {
+ .configure_phy = rcar_hdmi_phy_configure,
+ .quirks = DW_HDMI_QUIRK_PHY_SVSRET,
+};
+
+static int rcar_dw_hdmi_probe(struct platform_device *pdev)
+{
+ return dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
+}
+
+static int rcar_dw_hdmi_remove(struct platform_device *pdev)
+{
+ dw_hdmi_remove(pdev);
+
+ return 0;
+}
+
+static const struct of_device_id rcar_dw_hdmi_of_table[] = {
+ { .compatible = "renesas,rcar-gen3-hdmi" },
+ { /* Sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, rcar_dw_hdmi_of_table);
+
+static struct platform_driver rcar_dw_hdmi_platform_driver = {
+ .probe = rcar_dw_hdmi_probe,
+ .remove = rcar_dw_hdmi_remove,
+ .driver = {
+ .name = "rcar-dw-hdmi",
+ .of_match_table = rcar_dw_hdmi_of_table,
+ },
+};
+
+module_platform_driver(rcar_dw_hdmi_platform_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("Renesas R-Car Gen3 HDMI Encoder Driver");
+MODULE_LICENSE("GPL");
--
Regards,
Laurent Pinchart
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