This driver serves just as planes sharing manager, needed for Display Engine 3.3 and newer.
Signed-off-by: Jernej Skrabec <[email protected]> --- drivers/gpu/drm/sun4i/Kconfig | 8 + drivers/gpu/drm/sun4i/Makefile | 1 + drivers/gpu/drm/sun4i/sun50i_planes.c | 205 ++++++++++++++++++++++++++ drivers/gpu/drm/sun4i/sun50i_planes.h | 43 ++++++ 4 files changed, 257 insertions(+) create mode 100644 drivers/gpu/drm/sun4i/sun50i_planes.c create mode 100644 drivers/gpu/drm/sun4i/sun50i_planes.h diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig index b56ba00aabca..946dd7606094 100644 --- a/drivers/gpu/drm/sun4i/Kconfig +++ b/drivers/gpu/drm/sun4i/Kconfig @@ -85,4 +85,12 @@ config DRM_SUN8I_TCON_TOP TCON TOP is responsible for configuring display pipeline for HDMI, TVE and LCD. +config DRM_SUN50I_PLANES + tristate + default DRM_SUN4I if DRM_SUN8I_MIXER!=n + help + Chose this option if you have an Allwinner Soc with the + Display Engine 3.3 or newer. Planes are shared resource + between multiple mixers. + endif diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile index bad7497a0d11..03f002abef15 100644 --- a/drivers/gpu/drm/sun4i/Makefile +++ b/drivers/gpu/drm/sun4i/Makefile @@ -38,3 +38,4 @@ obj-$(CONFIG_DRM_SUN6I_DSI) += sun6i_mipi_dsi.o obj-$(CONFIG_DRM_SUN8I_DW_HDMI) += sun8i-drm-hdmi.o obj-$(CONFIG_DRM_SUN8I_MIXER) += sun8i-mixer.o obj-$(CONFIG_DRM_SUN8I_TCON_TOP) += sun8i_tcon_top.o +obj-$(CONFIG_DRM_SUN50I_PLANES) += sun50i_planes.o diff --git a/drivers/gpu/drm/sun4i/sun50i_planes.c b/drivers/gpu/drm/sun4i/sun50i_planes.c new file mode 100644 index 000000000000..a99c01122990 --- /dev/null +++ b/drivers/gpu/drm/sun4i/sun50i_planes.c @@ -0,0 +1,205 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (c) 2025 Jernej Skrabec <[email protected]> */ + +#include <linux/device.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_graph.h> +#include <linux/platform_device.h> + +#include "sun50i_planes.h" +#include "sun8i_ui_layer.h" +#include "sun8i_vi_layer.h" + +static bool sun50i_planes_node_is_planes(struct device_node *node) +{ + return !!of_match_node(sun50i_planes_of_table, node); +} + +struct drm_plane ** +sun50i_planes_setup(struct device *dev, struct drm_device *drm, + unsigned int mixer) +{ + struct sun50i_planes *planes = dev_get_drvdata(dev); + const struct sun50i_planes_quirks *quirks; + struct drm_plane **drm_planes; + const struct default_map *map; + unsigned int i; + + if (!sun50i_planes_node_is_planes(dev->of_node)) { + dev_err(dev, "Device is not planes driver!\n"); + return NULL; + } + + if (!planes) { + dev_err(dev, "Planes driver is not loaded yet!\n"); + return NULL; + } + + if (mixer > 1) { + dev_err(dev, "Mixer index is too high!\n"); + return NULL; + } + + quirks = planes->quirks; + map = &quirks->def_map[mixer]; + + drm_planes = devm_kcalloc(drm->dev, map->num_ch + 1, + sizeof(*drm_planes), GFP_KERNEL); + if (!drm_planes) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < map->num_ch; i++) { + unsigned int phy_ch = map->map[i]; + struct sun8i_layer *layer; + enum drm_plane_type type; + + if ((i == 0 && map->num_ch == 1) || i == 1) + type = DRM_PLANE_TYPE_PRIMARY; + else + type = DRM_PLANE_TYPE_OVERLAY; + + if (phy_ch < UI_PLANE_OFFSET) + layer = sun8i_vi_layer_init_one(drm, type, planes->regs, + i, phy_ch, map->num_ch, + &quirks->cfg); + else + layer = sun8i_ui_layer_init_one(drm, type, planes->regs, + i, phy_ch, map->num_ch, + &quirks->cfg); + + if (IS_ERR(layer)) { + dev_err(drm->dev, + "Couldn't initialize DRM plane\n"); + return ERR_CAST(layer); + } + + drm_planes[i] = &layer->plane; + } + + return drm_planes; +} +EXPORT_SYMBOL(sun50i_planes_setup); + +static void sun50i_planes_init_mapping(struct sun50i_planes *planes) +{ + const struct sun50i_planes_quirks *quirks = planes->quirks; + unsigned int i, j; + u32 mapping; + + mapping = 0; + for (j = 0; j < MAX_DISP; j++) + for (i = 0; i < quirks->def_map[j].num_ch; i++) { + unsigned int ch = quirks->def_map[j].map[i]; + + if (ch < UI_PLANE_OFFSET) + mapping |= j << (ch * 2); + else + mapping |= j << ((ch - UI_PLANE_OFFSET) * 2 + 16); + } + regmap_write(planes->mapping, SUNXI_DE33_DE_CHN2CORE_MUX_REG, mapping); + + for (j = 0; j < MAX_DISP; j++) { + mapping = 0; + for (i = 0; i < quirks->def_map[j].num_ch; i++) { + unsigned int ch = quirks->def_map[j].map[i]; + + if (ch >= UI_PLANE_OFFSET) + ch += 2; + + mapping |= ch << (i * 4); + } + regmap_write(planes->mapping, SUNXI_DE33_DE_PORT02CHN_MUX_REG + j * 4, mapping); + } +} + +static const struct regmap_config sun50i_planes_regmap_config = { + .name = "planes", + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = 0x17fffc, +}; + +static int sun50i_planes_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct sun50i_planes *planes; + void __iomem *regs; + + planes = devm_kzalloc(dev, sizeof(*planes), GFP_KERNEL); + if (!planes) + return -ENOMEM; + + planes->quirks = of_device_get_match_data(&pdev->dev); + if (!planes->quirks) + return dev_err_probe(dev, -EINVAL, "Unable to get quirks\n"); + + planes->mapping = syscon_regmap_lookup_by_phandle(dev->of_node, + "allwinner,plane-mapping"); + if (IS_ERR(planes->mapping)) + return dev_err_probe(dev, PTR_ERR(planes->mapping), + "Unable to get mapping\n"); + + regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + planes->regs = devm_regmap_init_mmio(dev, regs, &sun50i_planes_regmap_config); + if (IS_ERR(planes->regs)) + return PTR_ERR(planes->regs); + + dev_set_drvdata(dev, planes); + + sun50i_planes_init_mapping(planes); + + return 0; +} + +static const struct sun50i_planes_quirks sun50i_h616_planes_quirks = { + .def_map = { + { + .map = {0, 6, 7}, + .num_ch = 3, + }, + { + .map = {1, 2, 8}, + .num_ch = 3, + }, + }, + .cfg = { + .de_type = SUN8I_MIXER_DE33, + /* + * TODO: All planes support scaling, but driver needs + * improvements to properly support it. + */ + .scaler_mask = 0, + .scanline_yuv = 4096, + }, +}; + +/* sun4i_drv uses this list to check if a device node is a plane */ +const struct of_device_id sun50i_planes_of_table[] = { + { + .compatible = "allwinner,sun50i-h616-de33-planes", + .data = &sun50i_h616_planes_quirks + }, + { } +}; +MODULE_DEVICE_TABLE(of, sun50i_planes_of_table); +EXPORT_SYMBOL(sun50i_planes_of_table); + +static struct platform_driver sun50i_planes_platform_driver = { + .probe = sun50i_planes_probe, + .driver = { + .name = "sun50i-planes", + .of_match_table = sun50i_planes_of_table, + }, +}; +module_platform_driver(sun50i_planes_platform_driver); + +MODULE_AUTHOR("Jernej Skrabec <[email protected]>"); +MODULE_DESCRIPTION("Allwinner DE33 planes driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/gpu/drm/sun4i/sun50i_planes.h b/drivers/gpu/drm/sun4i/sun50i_planes.h new file mode 100644 index 000000000000..446feaeb03fc --- /dev/null +++ b/drivers/gpu/drm/sun4i/sun50i_planes.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* Copyright (c) 2025 Jernej Skrabec <[email protected]> */ + +#ifndef _SUN50I_PLANES_H_ +#define _SUN50I_PLANES_H_ + +#include <drm/drm_device.h> +#include <linux/regmap.h> + +#include "sun8i_mixer.h" + +/* mapping registers, located in clock register space */ +#define SUNXI_DE33_DE_CHN2CORE_MUX_REG 0x24 +#define SUNXI_DE33_DE_PORT02CHN_MUX_REG 0x28 +#define SUNXI_DE33_DE_PORT12CHN_MUX_REG 0x2c + +#define MAX_DISP 2 +#define MAX_CHANNELS 8 +#define UI_PLANE_OFFSET 6 + +struct default_map { + unsigned int map[MAX_CHANNELS]; + unsigned int num_ch; +}; + +struct sun50i_planes_quirks { + struct default_map def_map[MAX_DISP]; + struct sun8i_layer_cfg cfg; +}; + +struct sun50i_planes { + struct regmap *regs; + struct regmap *mapping; + const struct sun50i_planes_quirks *quirks; +}; + +extern const struct of_device_id sun50i_planes_of_table[]; + +struct drm_plane ** +sun50i_planes_setup(struct device *dev, struct drm_device *drm, + unsigned int mixer); + +#endif /* _SUN50I_PLANES_H_ */ -- 2.51.2
