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Sat, 14 Nov 2026 22:11:30 -0800 (PST) Received: from jernej-laptop ([2a00:ee2:6a02:9300:bb69:6bcf:1b11:e85b]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4bb5ba25b50sm139331075e9.14.2026.11.14.22.11.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Nov 2026 22:11:29 -0800 (PST) From: Jernej Skrabec To: Chen-Yu Tsai , Samuel Holland Cc: mripard@kernel.org, maarten.lankhorst@linux.intel.com, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, bmasney+clk@redhat.com, jbrunet+clk@baylibre.com, sboyd@kernel.org, Andre Przywara , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org Subject: [PATCH v3 6/8] drm/sun4i: Add DE33 shared plane driver Date: Sun, 15 Nov 2026 07:11:00 +0100 Message-ID: <20261115061102.229680-7-jernej.skrabec@gmail.com> X-Mailer: git-send-email 2.56.1 In-Reply-To: <20261115061102.229680-1-jernej.skrabec@gmail.com> References: <20261115061102.229680-1-jernej.skrabec@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit DE33 makes its plane channels shared resources that mixers select through routing registers in the display clock block. The existing mixer-local plane initialization cannot represent that topology. Add a component that owns the shared plane register space, programs the default channel-to-mixer mapping and creates each mixer's DRM planes from that mapping. Signed-off-by: Jernej Skrabec --- drivers/gpu/drm/sun4i/Makefile | 3 +- drivers/gpu/drm/sun4i/sun50i_planes.c | 215 ++++++++++++++++++++++++++ drivers/gpu/drm/sun4i/sun50i_planes.h | 43 ++++++ 3 files changed, 260 insertions(+), 1 deletion(-) 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/Makefile b/drivers/gpu/drm/sun4i/Makefile index bad7497a0d11..501e3d867918 100644 --- a/drivers/gpu/drm/sun4i/Makefile +++ b/drivers/gpu/drm/sun4i/Makefile @@ -16,7 +16,8 @@ sun8i-drm-hdmi-y += sun8i_hdmi_phy_clk.o sun8i-mixer-y += sun8i_mixer.o sun8i_ui_layer.o \ sun8i_vi_layer.o sun8i_ui_scaler.o \ - sun8i_vi_scaler.o sun8i_csc.o + sun8i_vi_scaler.o sun8i_csc.o \ + sun50i_planes.o sun4i-tcon-y += sun4i_crtc.o sun4i-tcon-y += sun4i_tcon_dclk.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..22b9f104a391 --- /dev/null +++ b/drivers/gpu/drm/sun4i/sun50i_planes.c @@ -0,0 +1,215 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (c) 2025 Jernej Skrabec */ + +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sun50i_planes.h" +#include "sun8i_ui_layer.h" +#include "sun8i_vi_layer.h" + +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, + }, +}; + +static 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); + +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 (!of_match_node(sun50i_planes_of_table, dev->of_node)) { + dev_err(dev, "Device is not planes driver!\n"); + return ERR_PTR(-EINVAL); + } + + if (!planes) { + dev_err(dev, "Planes driver is not loaded yet!\n"); + return ERR_PTR(-EINVAL); + } + + if (mixer > 1) { + dev_err(dev, "Mixer index is too high!\n"); + return ERR_PTR(-EINVAL); + } + + 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; +} + +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 platform_device *clk_pdev; + struct device *dev = &pdev->dev; + struct sun50i_planes *planes; + struct device_node *np; + void __iomem *regs; + + planes = devm_kzalloc(dev, sizeof(*planes), GFP_KERNEL); + if (!planes) + return -ENOMEM; + + planes->quirks = of_device_get_match_data(dev); + if (!planes->quirks) + return dev_err_probe(dev, -EINVAL, "Unable to get quirks\n"); + + np = of_parse_phandle(dev->of_node, + "allwinner,plane-mapping", 0); + if (!np) + return dev_err_probe(dev, -EINVAL, "Missing mapping phandle\n"); + + clk_pdev = of_find_device_by_node(np); + of_node_put(np); + if (!clk_pdev) + return dev_err_probe(dev, -EPROBE_DEFER, "Unable to get mapping\n"); + + /* Regmap is registered by display clocks driver during its probe. */ + planes->mapping = dev_get_regmap(&clk_pdev->dev, NULL); + if (!planes->mapping) { + platform_device_put(clk_pdev); + return dev_err_probe(dev, -EPROBE_DEFER, "Unable to get regmap\n"); + } + + if (!device_link_add(dev, &clk_pdev->dev, + DL_FLAG_AUTOREMOVE_CONSUMER)) { + platform_device_put(clk_pdev); + return dev_err_probe(dev, -EINVAL, "Failed to create link\n"); + } + platform_device_put(clk_pdev); + + 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); + + sun50i_planes_init_mapping(planes); + + dev_set_drvdata(dev, planes); + + return 0; +} + +struct platform_driver sun50i_planes_platform_driver = { + .probe = sun50i_planes_probe, + .driver = { + .name = "sun50i-planes", + .of_match_table = sun50i_planes_of_table, + }, +}; diff --git a/drivers/gpu/drm/sun4i/sun50i_planes.h b/drivers/gpu/drm/sun4i/sun50i_planes.h new file mode 100644 index 000000000000..7be969491f9c --- /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 */ + +#ifndef _SUN50I_PLANES_H_ +#define _SUN50I_PLANES_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 regmap; +struct drm_device; + +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; +}; + +struct drm_plane ** +sun50i_planes_setup(struct device *dev, struct drm_device *drm, + unsigned int mixer); + +extern struct platform_driver sun50i_planes_platform_driver; + +#endif /* _SUN50I_PLANES_H_ */ -- 2.43.0