265 lines
7.2 KiB
C
265 lines
7.2 KiB
C
/*
|
|
* Copyright (c) 2015 MediaTek Inc.
|
|
*
|
|
* 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 <drm/drmP.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/component.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include "mtk_drm_crtc.h"
|
|
#include "mtk_drm_ddp_comp.h"
|
|
|
|
#define DISP_REG_RDMA_INT_ENABLE 0x0000
|
|
#define DISP_REG_RDMA_INT_STATUS 0x0004
|
|
#define RDMA_TARGET_LINE_INT BIT(5)
|
|
#define RDMA_FIFO_UNDERFLOW_INT BIT(4)
|
|
#define RDMA_EOF_ABNORMAL_INT BIT(3)
|
|
#define RDMA_FRAME_END_INT BIT(2)
|
|
#define RDMA_FRAME_START_INT BIT(1)
|
|
#define RDMA_REG_UPDATE_INT BIT(0)
|
|
#define DISP_REG_RDMA_GLOBAL_CON 0x0010
|
|
#define RDMA_ENGINE_EN BIT(0)
|
|
#define DISP_REG_RDMA_SIZE_CON_0 0x0014
|
|
#define DISP_REG_RDMA_SIZE_CON_1 0x0018
|
|
#define DISP_REG_RDMA_TARGET_LINE 0x001c
|
|
#define DISP_REG_RDMA_FIFO_CON 0x0040
|
|
#define RDMA_FIFO_UNDERFLOW_EN BIT(31)
|
|
#define RDMA_FIFO_PSEUDO_SIZE(bytes) (((bytes) / 16) << 16)
|
|
#define RDMA_OUTPUT_VALID_FIFO_THRESHOLD(bytes) ((bytes) / 16)
|
|
#define RDMA_FIFO_SIZE(rdma) ((rdma)->data->fifo_size)
|
|
|
|
struct mtk_disp_rdma_data {
|
|
unsigned int fifo_size;
|
|
};
|
|
|
|
/**
|
|
* struct mtk_disp_rdma - DISP_RDMA driver structure
|
|
* @ddp_comp - structure containing type enum and hardware resources
|
|
* @crtc - associated crtc to report irq events to
|
|
*/
|
|
struct mtk_disp_rdma {
|
|
struct mtk_ddp_comp ddp_comp;
|
|
struct drm_crtc *crtc;
|
|
const struct mtk_disp_rdma_data *data;
|
|
};
|
|
|
|
static inline struct mtk_disp_rdma *comp_to_rdma(struct mtk_ddp_comp *comp)
|
|
{
|
|
return container_of(comp, struct mtk_disp_rdma, ddp_comp);
|
|
}
|
|
|
|
static irqreturn_t mtk_disp_rdma_irq_handler(int irq, void *dev_id)
|
|
{
|
|
struct mtk_disp_rdma *priv = dev_id;
|
|
struct mtk_ddp_comp *rdma = &priv->ddp_comp;
|
|
|
|
/* Clear frame completion interrupt */
|
|
writel(0x0, rdma->regs + DISP_REG_RDMA_INT_STATUS);
|
|
|
|
if (!priv->crtc)
|
|
return IRQ_NONE;
|
|
|
|
mtk_crtc_ddp_irq(priv->crtc, rdma);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void rdma_update_bits(struct mtk_ddp_comp *comp, unsigned int reg,
|
|
unsigned int mask, unsigned int val)
|
|
{
|
|
unsigned int tmp = readl(comp->regs + reg);
|
|
|
|
tmp = (tmp & ~mask) | (val & mask);
|
|
writel(tmp, comp->regs + reg);
|
|
}
|
|
|
|
static void mtk_rdma_enable_vblank(struct mtk_ddp_comp *comp,
|
|
struct drm_crtc *crtc)
|
|
{
|
|
struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
|
|
|
|
rdma->crtc = crtc;
|
|
rdma_update_bits(comp, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT,
|
|
RDMA_FRAME_END_INT);
|
|
}
|
|
|
|
static void mtk_rdma_disable_vblank(struct mtk_ddp_comp *comp)
|
|
{
|
|
struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
|
|
|
|
rdma->crtc = NULL;
|
|
rdma_update_bits(comp, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT, 0);
|
|
}
|
|
|
|
static void mtk_rdma_start(struct mtk_ddp_comp *comp)
|
|
{
|
|
rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN,
|
|
RDMA_ENGINE_EN);
|
|
}
|
|
|
|
static void mtk_rdma_stop(struct mtk_ddp_comp *comp)
|
|
{
|
|
rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN, 0);
|
|
}
|
|
|
|
static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width,
|
|
unsigned int height, unsigned int vrefresh,
|
|
unsigned int bpc)
|
|
{
|
|
unsigned int threshold;
|
|
unsigned int reg;
|
|
struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
|
|
|
|
rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_0, 0xfff, width);
|
|
rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_1, 0xfffff, height);
|
|
|
|
/*
|
|
* Enable FIFO underflow since DSI and DPI can't be blocked.
|
|
* Keep the FIFO pseudo size reset default of 8 KiB. Set the
|
|
* output threshold to 6 microseconds with 7/6 overhead to
|
|
* account for blanking, and with a pixel depth of 4 bytes:
|
|
*/
|
|
threshold = width * height * vrefresh * 4 * 7 / 1000000;
|
|
reg = RDMA_FIFO_UNDERFLOW_EN |
|
|
RDMA_FIFO_PSEUDO_SIZE(RDMA_FIFO_SIZE(rdma)) |
|
|
RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold);
|
|
writel(reg, comp->regs + DISP_REG_RDMA_FIFO_CON);
|
|
}
|
|
|
|
static const struct mtk_ddp_comp_funcs mtk_disp_rdma_funcs = {
|
|
.config = mtk_rdma_config,
|
|
.start = mtk_rdma_start,
|
|
.stop = mtk_rdma_stop,
|
|
.enable_vblank = mtk_rdma_enable_vblank,
|
|
.disable_vblank = mtk_rdma_disable_vblank,
|
|
};
|
|
|
|
static int mtk_disp_rdma_bind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct mtk_disp_rdma *priv = dev_get_drvdata(dev);
|
|
struct drm_device *drm_dev = data;
|
|
int ret;
|
|
|
|
ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp);
|
|
if (ret < 0) {
|
|
dev_err(dev, "Failed to register component %s: %d\n",
|
|
dev->of_node->full_name, ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
static void mtk_disp_rdma_unbind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct mtk_disp_rdma *priv = dev_get_drvdata(dev);
|
|
struct drm_device *drm_dev = data;
|
|
|
|
mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp);
|
|
}
|
|
|
|
static const struct component_ops mtk_disp_rdma_component_ops = {
|
|
.bind = mtk_disp_rdma_bind,
|
|
.unbind = mtk_disp_rdma_unbind,
|
|
};
|
|
|
|
static int mtk_disp_rdma_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct mtk_disp_rdma *priv;
|
|
int comp_id;
|
|
int irq;
|
|
int ret;
|
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_RDMA);
|
|
if (comp_id < 0) {
|
|
dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
|
|
return comp_id;
|
|
}
|
|
|
|
ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
|
|
&mtk_disp_rdma_funcs);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to initialize component: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Disable and clear pending interrupts */
|
|
writel(0x0, priv->ddp_comp.regs + DISP_REG_RDMA_INT_ENABLE);
|
|
writel(0x0, priv->ddp_comp.regs + DISP_REG_RDMA_INT_STATUS);
|
|
|
|
ret = devm_request_irq(dev, irq, mtk_disp_rdma_irq_handler,
|
|
IRQF_TRIGGER_NONE, dev_name(dev), priv);
|
|
if (ret < 0) {
|
|
dev_err(dev, "Failed to request irq %d: %d\n", irq, ret);
|
|
return ret;
|
|
}
|
|
|
|
priv->data = of_device_get_match_data(dev);
|
|
|
|
platform_set_drvdata(pdev, priv);
|
|
|
|
ret = component_add(dev, &mtk_disp_rdma_component_ops);
|
|
if (ret)
|
|
dev_err(dev, "Failed to add component: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mtk_disp_rdma_remove(struct platform_device *pdev)
|
|
{
|
|
component_del(&pdev->dev, &mtk_disp_rdma_component_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct mtk_disp_rdma_data mt2701_rdma_driver_data = {
|
|
.fifo_size = SZ_4K,
|
|
};
|
|
|
|
static const struct mtk_disp_rdma_data mt8173_rdma_driver_data = {
|
|
.fifo_size = SZ_8K,
|
|
};
|
|
|
|
static const struct of_device_id mtk_disp_rdma_driver_dt_match[] = {
|
|
{ .compatible = "mediatek,mt2701-disp-rdma",
|
|
.data = &mt2701_rdma_driver_data},
|
|
{ .compatible = "mediatek,mt8173-disp-rdma",
|
|
.data = &mt8173_rdma_driver_data},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mtk_disp_rdma_driver_dt_match);
|
|
|
|
struct platform_driver mtk_disp_rdma_driver = {
|
|
.probe = mtk_disp_rdma_probe,
|
|
.remove = mtk_disp_rdma_remove,
|
|
.driver = {
|
|
.name = "mediatek-disp-rdma",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = mtk_disp_rdma_driver_dt_match,
|
|
},
|
|
};
|