diff options
Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_disp_color.c')
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_disp_color.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_color.c b/drivers/gpu/drm/mediatek/mtk_disp_color.c new file mode 100644 index 000000000..78ea99f14 --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_disp_color.c @@ -0,0 +1,170 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2017 MediaTek Inc. + */ + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/soc/mediatek/mtk-cmdq.h> + +#include "mtk_disp_drv.h" +#include "mtk_drm_crtc.h" +#include "mtk_drm_ddp_comp.h" +#include "mtk_drm_drv.h" + +#define DISP_COLOR_CFG_MAIN 0x0400 +#define DISP_COLOR_START_MT2701 0x0f00 +#define DISP_COLOR_START_MT8167 0x0400 +#define DISP_COLOR_START_MT8173 0x0c00 +#define DISP_COLOR_START(comp) ((comp)->data->color_offset) +#define DISP_COLOR_WIDTH(comp) (DISP_COLOR_START(comp) + 0x50) +#define DISP_COLOR_HEIGHT(comp) (DISP_COLOR_START(comp) + 0x54) + +#define COLOR_BYPASS_ALL BIT(7) +#define COLOR_SEQ_SEL BIT(13) + +struct mtk_disp_color_data { + unsigned int color_offset; +}; + +/* + * struct mtk_disp_color - DISP_COLOR driver structure + * @crtc: associated crtc to report irq events to + * @data: platform colour driver data + */ +struct mtk_disp_color { + struct drm_crtc *crtc; + struct clk *clk; + void __iomem *regs; + struct cmdq_client_reg cmdq_reg; + const struct mtk_disp_color_data *data; +}; + +int mtk_color_clk_enable(struct device *dev) +{ + struct mtk_disp_color *color = dev_get_drvdata(dev); + + return clk_prepare_enable(color->clk); +} + +void mtk_color_clk_disable(struct device *dev) +{ + struct mtk_disp_color *color = dev_get_drvdata(dev); + + clk_disable_unprepare(color->clk); +} + +void mtk_color_config(struct device *dev, unsigned int w, + unsigned int h, unsigned int vrefresh, + unsigned int bpc, struct cmdq_pkt *cmdq_pkt) +{ + struct mtk_disp_color *color = dev_get_drvdata(dev); + + mtk_ddp_write(cmdq_pkt, w, &color->cmdq_reg, color->regs, DISP_COLOR_WIDTH(color)); + mtk_ddp_write(cmdq_pkt, h, &color->cmdq_reg, color->regs, DISP_COLOR_HEIGHT(color)); +} + +void mtk_color_start(struct device *dev) +{ + struct mtk_disp_color *color = dev_get_drvdata(dev); + + writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL, + color->regs + DISP_COLOR_CFG_MAIN); + writel(0x1, color->regs + DISP_COLOR_START(color)); +} + +static int mtk_disp_color_bind(struct device *dev, struct device *master, + void *data) +{ + return 0; +} + +static void mtk_disp_color_unbind(struct device *dev, struct device *master, + void *data) +{ +} + +static const struct component_ops mtk_disp_color_component_ops = { + .bind = mtk_disp_color_bind, + .unbind = mtk_disp_color_unbind, +}; + +static int mtk_disp_color_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_disp_color *priv; + struct resource *res; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(priv->clk)) { + dev_err(dev, "failed to get color clk\n"); + return PTR_ERR(priv->clk); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->regs)) { + dev_err(dev, "failed to ioremap color\n"); + return PTR_ERR(priv->regs); + } +#if IS_REACHABLE(CONFIG_MTK_CMDQ) + ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); + if (ret) + dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); +#endif + + priv->data = of_device_get_match_data(dev); + platform_set_drvdata(pdev, priv); + + ret = component_add(dev, &mtk_disp_color_component_ops); + if (ret) + dev_err(dev, "Failed to add component: %d\n", ret); + + return ret; +} + +static void mtk_disp_color_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &mtk_disp_color_component_ops); +} + +static const struct mtk_disp_color_data mt2701_color_driver_data = { + .color_offset = DISP_COLOR_START_MT2701, +}; + +static const struct mtk_disp_color_data mt8167_color_driver_data = { + .color_offset = DISP_COLOR_START_MT8167, +}; + +static const struct mtk_disp_color_data mt8173_color_driver_data = { + .color_offset = DISP_COLOR_START_MT8173, +}; + +static const struct of_device_id mtk_disp_color_driver_dt_match[] = { + { .compatible = "mediatek,mt2701-disp-color", + .data = &mt2701_color_driver_data}, + { .compatible = "mediatek,mt8167-disp-color", + .data = &mt8167_color_driver_data}, + { .compatible = "mediatek,mt8173-disp-color", + .data = &mt8173_color_driver_data}, + {}, +}; +MODULE_DEVICE_TABLE(of, mtk_disp_color_driver_dt_match); + +struct platform_driver mtk_disp_color_driver = { + .probe = mtk_disp_color_probe, + .remove_new = mtk_disp_color_remove, + .driver = { + .name = "mediatek-disp-color", + .owner = THIS_MODULE, + .of_match_table = mtk_disp_color_driver_dt_match, + }, +}; |