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Message-ID: <20240924-ubiquitous-festive-rabbit-55cdb0@houat>
Date: Tue, 24 Sep 2024 16:02:29 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
Cc: Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
Sandy Huang <hjc@...k-chips.com>, Heiko Stübner <heiko@...ech.de>,
Andy Yan <andy.yan@...k-chips.com>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
Mark Yao <markyao0591@...il.com>, Sascha Hauer <s.hauer@...gutronix.de>,
Simona Vetter <simona@...ll.ch>, Simona Vetter <simona.vetter@...ll.ch>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
kernel@...labora.com, Alexandre ARNOUD <aarnoud@...com>,
Luis de Arquer <ldearquer@...il.com>, Algea Cao <algea.cao@...k-chips.com>
Subject: Re: [PATCH v7 3/3] drm/rockchip: Add basic RK3588 HDMI output support
Hi,
On Sat, Sep 14, 2024 at 09:56:53PM GMT, Cristian Ciocaltea wrote:
> The RK3588 SoC family integrates the newer Synopsys DesignWare HDMI 2.1
> Quad-Pixel (QP) TX controller IP and a HDMI/eDP TX Combo PHY based on a
> Samsung IP block.
>
> Add just the basic support for now, i.e. RGB output up to 4K@...z,
> without audio, CEC or any of the HDMI 2.1 specific features.
>
> Co-developed-by: Algea Cao <algea.cao@...k-chips.com>
> Signed-off-by: Algea Cao <algea.cao@...k-chips.com>
> Tested-by: Heiko Stuebner <heiko@...ech.de>
> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
> ---
> drivers/gpu/drm/rockchip/Kconfig | 9 +
> drivers/gpu/drm/rockchip/Makefile | 1 +
> drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c | 436 +++++++++++++++++++++++++
> drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 2 +
> drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 1 +
> 5 files changed, 449 insertions(+)
>
> diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
> index 23c49e91f1cc..448fadd4ba15 100644
> --- a/drivers/gpu/drm/rockchip/Kconfig
> +++ b/drivers/gpu/drm/rockchip/Kconfig
> @@ -8,6 +8,7 @@ config DRM_ROCKCHIP
> select VIDEOMODE_HELPERS
> select DRM_ANALOGIX_DP if ROCKCHIP_ANALOGIX_DP
> select DRM_DW_HDMI if ROCKCHIP_DW_HDMI
> + select DRM_DW_HDMI_QP if ROCKCHIP_DW_HDMI_QP
> select DRM_DW_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI
> select GENERIC_PHY if ROCKCHIP_DW_MIPI_DSI
> select GENERIC_PHY_MIPI_DPHY if ROCKCHIP_DW_MIPI_DSI
> @@ -63,6 +64,14 @@ config ROCKCHIP_DW_HDMI
> enable HDMI on RK3288 or RK3399 based SoC, you should select
> this option.
>
> +config ROCKCHIP_DW_HDMI_QP
> + bool "Rockchip specific extensions for Synopsys DW HDMI QP"
> + select DRM_BRIDGE_CONNECTOR
> + help
> + This selects support for Rockchip SoC specific extensions
> + for the Synopsys DesignWare HDMI QP driver. If you want to
> + enable HDMI on RK3588 based SoC, you should select this option.
> +
> config ROCKCHIP_DW_MIPI_DSI
> bool "Rockchip specific extensions for Synopsys DW MIPI DSI"
> select GENERIC_PHY_MIPI_DPHY
> diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile
> index 3ff7b21c0414..3eab662a5a1d 100644
> --- a/drivers/gpu/drm/rockchip/Makefile
> +++ b/drivers/gpu/drm/rockchip/Makefile
> @@ -11,6 +11,7 @@ rockchipdrm-$(CONFIG_ROCKCHIP_VOP) += rockchip_drm_vop.o rockchip_vop_reg.o
> rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
> rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
> rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
> +rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI_QP) += dw_hdmi_qp-rockchip.o
> rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi-rockchip.o
> rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
> rockchipdrm-$(CONFIG_ROCKCHIP_LVDS) += rockchip_lvds.o
> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
> new file mode 100644
> index 000000000000..19d407c926bd
> --- /dev/null
> +++ b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
> @@ -0,0 +1,436 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (c) 2021-2022 Rockchip Electronics Co., Ltd.
> + * Copyright (c) 2024 Collabora Ltd.
> + *
> + * Author: Algea Cao <algea.cao@...k-chips.com>
> + * Author: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/phy/phy.h>
> +#include <linux/regmap.h>
> +#include <linux/workqueue.h>
> +
> +#include <drm/bridge/dw_hdmi_qp.h>
> +#include <drm/drm_bridge_connector.h>
> +#include <drm/drm_of.h>
> +#include <drm/drm_probe_helper.h>
> +#include <drm/drm_simple_kms_helper.h>
> +
> +#include "rockchip_drm_drv.h"
> +
> +#define RK3588_GRF_SOC_CON2 0x0308
> +#define RK3588_HDMI0_HPD_INT_MSK BIT(13)
> +#define RK3588_HDMI0_HPD_INT_CLR BIT(12)
> +#define RK3588_GRF_SOC_CON7 0x031c
> +#define RK3588_SET_HPD_PATH_MASK GENMASK(13, 12)
> +#define RK3588_GRF_SOC_STATUS1 0x0384
> +#define RK3588_HDMI0_LEVEL_INT BIT(16)
> +#define RK3588_GRF_VO1_CON3 0x000c
> +#define RK3588_SCLIN_MASK BIT(9)
> +#define RK3588_SDAIN_MASK BIT(10)
> +#define RK3588_MODE_MASK BIT(11)
> +#define RK3588_I2S_SEL_MASK BIT(13)
> +#define RK3588_GRF_VO1_CON9 0x0024
> +#define RK3588_HDMI0_GRANT_SEL BIT(10)
> +
> +#define HIWORD_UPDATE(val, mask) ((val) | (mask) << 16)
> +
> +struct rockchip_hdmi_qp {
> + struct device *dev;
> + struct regmap *regmap;
> + struct regmap *vo_regmap;
> + struct rockchip_encoder encoder;
> + struct clk *ref_clk;
> + struct dw_hdmi_qp *hdmi;
> + struct phy *phy;
> + struct gpio_desc *enable_gpio;
> + struct delayed_work hpd_work;
> +};
> +
> +static struct rockchip_hdmi_qp *to_rockchip_hdmi_qp(struct drm_encoder *encoder)
> +{
> + struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
> +
> + return container_of(rkencoder, struct rockchip_hdmi_qp, encoder);
> +}
> +
> +static void
> +dw_hdmi_qp_rockchip_encoder_mode_set(struct drm_encoder *encoder,
> + struct drm_display_mode *mode,
> + struct drm_display_mode *adj_mode)
> +{
> + struct rockchip_hdmi_qp *hdmi = to_rockchip_hdmi_qp(encoder);
> +
> + clk_set_rate(hdmi->ref_clk, adj_mode->clock * 1000);
> +}
I'm not sure you can do that. mode_set can be called multiple times
while the connector is enabled. It would be better to drop the mode_set
implementation, and just put it in the encoder enable.
Maxime
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