303 lines
8.1 KiB
C
303 lines
8.1 KiB
C
/*
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* Copyright (c) 2015 MediaTek Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <drm/drmP.h>
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/of_device.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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#include "mtk_drm_crtc.h"
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#include "mtk_drm_ddp_comp.h"
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#define DISP_REG_OVL_INTEN 0x0004
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#define OVL_FME_CPL_INT BIT(1)
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#define DISP_REG_OVL_INTSTA 0x0008
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#define DISP_REG_OVL_EN 0x000c
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#define DISP_REG_OVL_RST 0x0014
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#define DISP_REG_OVL_ROI_SIZE 0x0020
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#define DISP_REG_OVL_ROI_BGCLR 0x0028
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#define DISP_REG_OVL_SRC_CON 0x002c
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#define DISP_REG_OVL_CON(n) (0x0030 + 0x20 * (n))
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#define DISP_REG_OVL_SRC_SIZE(n) (0x0038 + 0x20 * (n))
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#define DISP_REG_OVL_OFFSET(n) (0x003c + 0x20 * (n))
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#define DISP_REG_OVL_PITCH(n) (0x0044 + 0x20 * (n))
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#define DISP_REG_OVL_RDMA_CTRL(n) (0x00c0 + 0x20 * (n))
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#define DISP_REG_OVL_RDMA_GMC(n) (0x00c8 + 0x20 * (n))
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#define DISP_REG_OVL_ADDR(n) (0x0f40 + 0x20 * (n))
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#define OVL_RDMA_MEM_GMC 0x40402020
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#define OVL_CON_BYTE_SWAP BIT(24)
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#define OVL_CON_CLRFMT_RGB565 (0 << 12)
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#define OVL_CON_CLRFMT_RGB888 (1 << 12)
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#define OVL_CON_CLRFMT_RGBA8888 (2 << 12)
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#define OVL_CON_CLRFMT_ARGB8888 (3 << 12)
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#define OVL_CON_AEN BIT(8)
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#define OVL_CON_ALPHA 0xff
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/**
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* struct mtk_disp_ovl - DISP_OVL driver structure
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* @ddp_comp - structure containing type enum and hardware resources
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* @crtc - associated crtc to report vblank events to
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*/
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struct mtk_disp_ovl {
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struct mtk_ddp_comp ddp_comp;
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struct drm_crtc *crtc;
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};
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static irqreturn_t mtk_disp_ovl_irq_handler(int irq, void *dev_id)
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{
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struct mtk_disp_ovl *priv = dev_id;
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struct mtk_ddp_comp *ovl = &priv->ddp_comp;
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/* Clear frame completion interrupt */
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writel(0x0, ovl->regs + DISP_REG_OVL_INTSTA);
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if (!priv->crtc)
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return IRQ_NONE;
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mtk_crtc_ddp_irq(priv->crtc, ovl);
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return IRQ_HANDLED;
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}
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static void mtk_ovl_enable_vblank(struct mtk_ddp_comp *comp,
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struct drm_crtc *crtc)
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{
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struct mtk_disp_ovl *priv = container_of(comp, struct mtk_disp_ovl,
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ddp_comp);
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priv->crtc = crtc;
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writel_relaxed(OVL_FME_CPL_INT, comp->regs + DISP_REG_OVL_INTEN);
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}
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static void mtk_ovl_disable_vblank(struct mtk_ddp_comp *comp)
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{
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struct mtk_disp_ovl *priv = container_of(comp, struct mtk_disp_ovl,
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ddp_comp);
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priv->crtc = NULL;
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writel_relaxed(0x0, comp->regs + DISP_REG_OVL_INTEN);
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}
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static void mtk_ovl_start(struct mtk_ddp_comp *comp)
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{
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writel_relaxed(0x1, comp->regs + DISP_REG_OVL_EN);
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}
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static void mtk_ovl_stop(struct mtk_ddp_comp *comp)
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{
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writel_relaxed(0x0, comp->regs + DISP_REG_OVL_EN);
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}
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static void mtk_ovl_config(struct mtk_ddp_comp *comp, unsigned int w,
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unsigned int h, unsigned int vrefresh)
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{
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if (w != 0 && h != 0)
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writel_relaxed(h << 16 | w, comp->regs + DISP_REG_OVL_ROI_SIZE);
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writel_relaxed(0x0, comp->regs + DISP_REG_OVL_ROI_BGCLR);
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writel(0x1, comp->regs + DISP_REG_OVL_RST);
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writel(0x0, comp->regs + DISP_REG_OVL_RST);
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}
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static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
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{
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unsigned int reg;
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writel(0x1, comp->regs + DISP_REG_OVL_RDMA_CTRL(idx));
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writel(OVL_RDMA_MEM_GMC, comp->regs + DISP_REG_OVL_RDMA_GMC(idx));
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reg = readl(comp->regs + DISP_REG_OVL_SRC_CON);
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reg = reg | BIT(idx);
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writel(reg, comp->regs + DISP_REG_OVL_SRC_CON);
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}
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static void mtk_ovl_layer_off(struct mtk_ddp_comp *comp, unsigned int idx)
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{
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unsigned int reg;
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reg = readl(comp->regs + DISP_REG_OVL_SRC_CON);
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reg = reg & ~BIT(idx);
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writel(reg, comp->regs + DISP_REG_OVL_SRC_CON);
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writel(0x0, comp->regs + DISP_REG_OVL_RDMA_CTRL(idx));
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}
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static unsigned int ovl_fmt_convert(unsigned int fmt)
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{
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switch (fmt) {
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default:
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case DRM_FORMAT_RGB565:
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return OVL_CON_CLRFMT_RGB565;
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case DRM_FORMAT_BGR565:
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return OVL_CON_CLRFMT_RGB565 | OVL_CON_BYTE_SWAP;
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case DRM_FORMAT_RGB888:
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return OVL_CON_CLRFMT_RGB888;
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case DRM_FORMAT_BGR888:
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return OVL_CON_CLRFMT_RGB888 | OVL_CON_BYTE_SWAP;
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case DRM_FORMAT_RGBX8888:
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case DRM_FORMAT_RGBA8888:
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return OVL_CON_CLRFMT_ARGB8888;
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case DRM_FORMAT_BGRX8888:
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case DRM_FORMAT_BGRA8888:
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return OVL_CON_CLRFMT_ARGB8888 | OVL_CON_BYTE_SWAP;
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case DRM_FORMAT_XRGB8888:
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case DRM_FORMAT_ARGB8888:
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return OVL_CON_CLRFMT_RGBA8888;
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case DRM_FORMAT_XBGR8888:
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case DRM_FORMAT_ABGR8888:
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return OVL_CON_CLRFMT_RGBA8888 | OVL_CON_BYTE_SWAP;
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}
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}
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static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
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struct mtk_plane_state *state)
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{
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struct mtk_plane_pending_state *pending = &state->pending;
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unsigned int addr = pending->addr;
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unsigned int pitch = pending->pitch & 0xffff;
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unsigned int fmt = pending->format;
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unsigned int offset = (pending->y << 16) | pending->x;
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unsigned int src_size = (pending->height << 16) | pending->width;
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unsigned int con;
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if (!pending->enable)
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mtk_ovl_layer_off(comp, idx);
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con = ovl_fmt_convert(fmt);
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if (idx != 0)
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con |= OVL_CON_AEN | OVL_CON_ALPHA;
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writel_relaxed(con, comp->regs + DISP_REG_OVL_CON(idx));
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writel_relaxed(pitch, comp->regs + DISP_REG_OVL_PITCH(idx));
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writel_relaxed(src_size, comp->regs + DISP_REG_OVL_SRC_SIZE(idx));
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writel_relaxed(offset, comp->regs + DISP_REG_OVL_OFFSET(idx));
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writel_relaxed(addr, comp->regs + DISP_REG_OVL_ADDR(idx));
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if (pending->enable)
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mtk_ovl_layer_on(comp, idx);
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}
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static const struct mtk_ddp_comp_funcs mtk_disp_ovl_funcs = {
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.config = mtk_ovl_config,
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.start = mtk_ovl_start,
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.stop = mtk_ovl_stop,
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.enable_vblank = mtk_ovl_enable_vblank,
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.disable_vblank = mtk_ovl_disable_vblank,
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.layer_on = mtk_ovl_layer_on,
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.layer_off = mtk_ovl_layer_off,
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.layer_config = mtk_ovl_layer_config,
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};
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static int mtk_disp_ovl_bind(struct device *dev, struct device *master,
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void *data)
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{
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struct mtk_disp_ovl *priv = dev_get_drvdata(dev);
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struct drm_device *drm_dev = data;
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int ret;
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ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp);
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if (ret < 0) {
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dev_err(dev, "Failed to register component %s: %d\n",
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dev->of_node->full_name, ret);
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return ret;
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}
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return 0;
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}
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static void mtk_disp_ovl_unbind(struct device *dev, struct device *master,
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void *data)
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{
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struct mtk_disp_ovl *priv = dev_get_drvdata(dev);
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struct drm_device *drm_dev = data;
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mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp);
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}
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static const struct component_ops mtk_disp_ovl_component_ops = {
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.bind = mtk_disp_ovl_bind,
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.unbind = mtk_disp_ovl_unbind,
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};
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static int mtk_disp_ovl_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct mtk_disp_ovl *priv;
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int comp_id;
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int irq;
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int ret;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return irq;
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ret = devm_request_irq(dev, irq, mtk_disp_ovl_irq_handler,
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IRQF_TRIGGER_NONE, dev_name(dev), priv);
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if (ret < 0) {
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dev_err(dev, "Failed to request irq %d: %d\n", irq, ret);
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return ret;
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}
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comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_OVL);
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if (comp_id < 0) {
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dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
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return comp_id;
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}
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ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
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&mtk_disp_ovl_funcs);
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if (ret) {
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dev_err(dev, "Failed to initialize component: %d\n", ret);
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return ret;
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}
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platform_set_drvdata(pdev, priv);
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ret = component_add(dev, &mtk_disp_ovl_component_ops);
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if (ret)
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dev_err(dev, "Failed to add component: %d\n", ret);
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return ret;
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}
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static int mtk_disp_ovl_remove(struct platform_device *pdev)
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{
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component_del(&pdev->dev, &mtk_disp_ovl_component_ops);
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return 0;
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}
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static const struct of_device_id mtk_disp_ovl_driver_dt_match[] = {
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{ .compatible = "mediatek,mt8173-disp-ovl", },
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{},
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};
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MODULE_DEVICE_TABLE(of, mtk_disp_ovl_driver_dt_match);
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struct platform_driver mtk_disp_ovl_driver = {
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.probe = mtk_disp_ovl_probe,
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.remove = mtk_disp_ovl_remove,
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.driver = {
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.name = "mediatek-disp-ovl",
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.owner = THIS_MODULE,
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.of_match_table = mtk_disp_ovl_driver_dt_match,
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},
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};
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