diff options
Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c')
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c new file mode 100644 index 000000000000..3970fcf0f05f --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c @@ -0,0 +1,225 @@ +/* + * Copyright (c) 2015 MediaTek Inc. + * Authors: + * YT Shen <yt.shen@mediatek.com> + * CK Hu <ck.hu@mediatek.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/clk.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <drm/drmP.h> +#include "mtk_drm_drv.h" +#include "mtk_drm_plane.h" +#include "mtk_drm_ddp_comp.h" + +#define DISP_OD_EN 0x0000 +#define DISP_OD_INTEN 0x0008 +#define DISP_OD_INTSTA 0x000c +#define DISP_OD_CFG 0x0020 +#define DISP_OD_SIZE 0x0030 + +#define DISP_REG_UFO_START 0x0000 + +#define DISP_COLOR_CFG_MAIN 0x0400 +#define DISP_COLOR_START 0x0c00 +#define DISP_COLOR_WIDTH 0x0c50 +#define DISP_COLOR_HEIGHT 0x0c54 + +#define OD_RELAY_MODE BIT(0) + +#define UFO_BYPASS BIT(2) + +#define COLOR_BYPASS_ALL BIT(7) +#define COLOR_SEQ_SEL BIT(13) + +static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w, + unsigned int h, unsigned int vrefresh) +{ + writel(w, comp->regs + DISP_COLOR_WIDTH); + writel(h, comp->regs + DISP_COLOR_HEIGHT); +} + +static void mtk_color_start(struct mtk_ddp_comp *comp) +{ + writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL, + comp->regs + DISP_COLOR_CFG_MAIN); + writel(0x1, comp->regs + DISP_COLOR_START); +} + +static void mtk_od_config(struct mtk_ddp_comp *comp, unsigned int w, + unsigned int h, unsigned int vrefresh) +{ + writel(w << 16 | h, comp->regs + DISP_OD_SIZE); +} + +static void mtk_od_start(struct mtk_ddp_comp *comp) +{ + writel(OD_RELAY_MODE, comp->regs + DISP_OD_CFG); + writel(1, comp->regs + DISP_OD_EN); +} + +static void mtk_ufoe_start(struct mtk_ddp_comp *comp) +{ + writel(UFO_BYPASS, comp->regs + DISP_REG_UFO_START); +} + +static const struct mtk_ddp_comp_funcs ddp_color = { + .config = mtk_color_config, + .start = mtk_color_start, +}; + +static const struct mtk_ddp_comp_funcs ddp_od = { + .config = mtk_od_config, + .start = mtk_od_start, +}; + +static const struct mtk_ddp_comp_funcs ddp_ufoe = { + .start = mtk_ufoe_start, +}; + +static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = { + [MTK_DISP_OVL] = "ovl", + [MTK_DISP_RDMA] = "rdma", + [MTK_DISP_WDMA] = "wdma", + [MTK_DISP_COLOR] = "color", + [MTK_DISP_AAL] = "aal", + [MTK_DISP_GAMMA] = "gamma", + [MTK_DISP_UFOE] = "ufoe", + [MTK_DSI] = "dsi", + [MTK_DPI] = "dpi", + [MTK_DISP_PWM] = "pwm", + [MTK_DISP_MUTEX] = "mutex", + [MTK_DISP_OD] = "od", +}; + +struct mtk_ddp_comp_match { + enum mtk_ddp_comp_type type; + int alias_id; + const struct mtk_ddp_comp_funcs *funcs; +}; + +static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = { + [DDP_COMPONENT_AAL] = { MTK_DISP_AAL, 0, NULL }, + [DDP_COMPONENT_COLOR0] = { MTK_DISP_COLOR, 0, &ddp_color }, + [DDP_COMPONENT_COLOR1] = { MTK_DISP_COLOR, 1, &ddp_color }, + [DDP_COMPONENT_DPI0] = { MTK_DPI, 0, NULL }, + [DDP_COMPONENT_DSI0] = { MTK_DSI, 0, NULL }, + [DDP_COMPONENT_DSI1] = { MTK_DSI, 1, NULL }, + [DDP_COMPONENT_GAMMA] = { MTK_DISP_GAMMA, 0, NULL }, + [DDP_COMPONENT_OD] = { MTK_DISP_OD, 0, &ddp_od }, + [DDP_COMPONENT_OVL0] = { MTK_DISP_OVL, 0, NULL }, + [DDP_COMPONENT_OVL1] = { MTK_DISP_OVL, 1, NULL }, + [DDP_COMPONENT_PWM0] = { MTK_DISP_PWM, 0, NULL }, + [DDP_COMPONENT_RDMA0] = { MTK_DISP_RDMA, 0, NULL }, + [DDP_COMPONENT_RDMA1] = { MTK_DISP_RDMA, 1, NULL }, + [DDP_COMPONENT_RDMA2] = { MTK_DISP_RDMA, 2, NULL }, + [DDP_COMPONENT_UFOE] = { MTK_DISP_UFOE, 0, &ddp_ufoe }, + [DDP_COMPONENT_WDMA0] = { MTK_DISP_WDMA, 0, NULL }, + [DDP_COMPONENT_WDMA1] = { MTK_DISP_WDMA, 1, NULL }, +}; + +int mtk_ddp_comp_get_id(struct device_node *node, + enum mtk_ddp_comp_type comp_type) +{ + int id = of_alias_get_id(node, mtk_ddp_comp_stem[comp_type]); + int i; + + for (i = 0; i < ARRAY_SIZE(mtk_ddp_matches); i++) { + if (comp_type == mtk_ddp_matches[i].type && + (id < 0 || id == mtk_ddp_matches[i].alias_id)) + return i; + } + + return -EINVAL; +} + +int mtk_ddp_comp_init(struct device *dev, struct device_node *node, + struct mtk_ddp_comp *comp, enum mtk_ddp_comp_id comp_id, + const struct mtk_ddp_comp_funcs *funcs) +{ + enum mtk_ddp_comp_type type; + struct device_node *larb_node; + struct platform_device *larb_pdev; + + if (comp_id < 0 || comp_id >= DDP_COMPONENT_ID_MAX) + return -EINVAL; + + comp->id = comp_id; + comp->funcs = funcs ?: mtk_ddp_matches[comp_id].funcs; + + if (comp_id == DDP_COMPONENT_DPI0 || + comp_id == DDP_COMPONENT_DSI0 || + comp_id == DDP_COMPONENT_PWM0) { + comp->regs = NULL; + comp->clk = NULL; + comp->irq = 0; + return 0; + } + + comp->regs = of_iomap(node, 0); + comp->irq = of_irq_get(node, 0); + comp->clk = of_clk_get(node, 0); + if (IS_ERR(comp->clk)) + comp->clk = NULL; + + type = mtk_ddp_matches[comp_id].type; + + /* Only DMA capable components need the LARB property */ + comp->larb_dev = NULL; + if (type != MTK_DISP_OVL && + type != MTK_DISP_RDMA && + type != MTK_DISP_WDMA) + return 0; + + larb_node = of_parse_phandle(node, "mediatek,larb", 0); + if (!larb_node) { + dev_err(dev, + "Missing mediadek,larb phandle in %s node\n", + node->full_name); + return -EINVAL; + } + + larb_pdev = of_find_device_by_node(larb_node); + if (!larb_pdev) { + dev_warn(dev, "Waiting for larb device %s\n", + larb_node->full_name); + of_node_put(larb_node); + return -EPROBE_DEFER; + } + of_node_put(larb_node); + + comp->larb_dev = &larb_pdev->dev; + + return 0; +} + +int mtk_ddp_comp_register(struct drm_device *drm, struct mtk_ddp_comp *comp) +{ + struct mtk_drm_private *private = drm->dev_private; + + if (private->ddp_comp[comp->id]) + return -EBUSY; + + private->ddp_comp[comp->id] = comp; + return 0; +} + +void mtk_ddp_comp_unregister(struct drm_device *drm, struct mtk_ddp_comp *comp) +{ + struct mtk_drm_private *private = drm->dev_private; + + private->ddp_comp[comp->id] = NULL; +} |