cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mtk_disp_aal.c (4046B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Copyright (c) 2021 MediaTek Inc.
      4 */
      5
      6#include <linux/clk.h>
      7#include <linux/component.h>
      8#include <linux/module.h>
      9#include <linux/of_device.h>
     10#include <linux/of_irq.h>
     11#include <linux/platform_device.h>
     12#include <linux/soc/mediatek/mtk-cmdq.h>
     13
     14#include "mtk_disp_drv.h"
     15#include "mtk_drm_crtc.h"
     16#include "mtk_drm_ddp_comp.h"
     17
     18#define DISP_AAL_EN				0x0000
     19#define AAL_EN						BIT(0)
     20#define DISP_AAL_SIZE				0x0030
     21#define DISP_AAL_OUTPUT_SIZE			0x04d8
     22
     23
     24struct mtk_disp_aal_data {
     25	bool has_gamma;
     26};
     27
     28/**
     29 * struct mtk_disp_aal - DISP_AAL driver structure
     30 * @ddp_comp - structure containing type enum and hardware resources
     31 * @crtc - associated crtc to report irq events to
     32 */
     33struct mtk_disp_aal {
     34	struct clk *clk;
     35	void __iomem *regs;
     36	struct cmdq_client_reg cmdq_reg;
     37	const struct mtk_disp_aal_data *data;
     38};
     39
     40int mtk_aal_clk_enable(struct device *dev)
     41{
     42	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
     43
     44	return clk_prepare_enable(aal->clk);
     45}
     46
     47void mtk_aal_clk_disable(struct device *dev)
     48{
     49	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
     50
     51	clk_disable_unprepare(aal->clk);
     52}
     53
     54void mtk_aal_config(struct device *dev, unsigned int w,
     55			   unsigned int h, unsigned int vrefresh,
     56			   unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
     57{
     58	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
     59
     60	mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
     61	mtk_ddp_write(cmdq_pkt, w << 16 | h, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
     62}
     63
     64void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
     65{
     66	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
     67
     68	if (aal->data && aal->data->has_gamma)
     69		mtk_gamma_set_common(aal->regs, state, false);
     70}
     71
     72void mtk_aal_start(struct device *dev)
     73{
     74	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
     75
     76	writel(AAL_EN, aal->regs + DISP_AAL_EN);
     77}
     78
     79void mtk_aal_stop(struct device *dev)
     80{
     81	struct mtk_disp_aal *aal = dev_get_drvdata(dev);
     82
     83	writel_relaxed(0x0, aal->regs + DISP_AAL_EN);
     84}
     85
     86static int mtk_disp_aal_bind(struct device *dev, struct device *master,
     87			       void *data)
     88{
     89	return 0;
     90}
     91
     92static void mtk_disp_aal_unbind(struct device *dev, struct device *master,
     93				  void *data)
     94{
     95}
     96
     97static const struct component_ops mtk_disp_aal_component_ops = {
     98	.bind	= mtk_disp_aal_bind,
     99	.unbind = mtk_disp_aal_unbind,
    100};
    101
    102static int mtk_disp_aal_probe(struct platform_device *pdev)
    103{
    104	struct device *dev = &pdev->dev;
    105	struct mtk_disp_aal *priv;
    106	struct resource *res;
    107	int ret;
    108
    109	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
    110	if (!priv)
    111		return -ENOMEM;
    112
    113	priv->clk = devm_clk_get(dev, NULL);
    114	if (IS_ERR(priv->clk)) {
    115		dev_err(dev, "failed to get aal clk\n");
    116		return PTR_ERR(priv->clk);
    117	}
    118
    119	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    120	priv->regs = devm_ioremap_resource(dev, res);
    121	if (IS_ERR(priv->regs)) {
    122		dev_err(dev, "failed to ioremap aal\n");
    123		return PTR_ERR(priv->regs);
    124	}
    125
    126#if IS_REACHABLE(CONFIG_MTK_CMDQ)
    127	ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
    128	if (ret)
    129		dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
    130#endif
    131
    132	priv->data = of_device_get_match_data(dev);
    133	platform_set_drvdata(pdev, priv);
    134
    135	ret = component_add(dev, &mtk_disp_aal_component_ops);
    136	if (ret)
    137		dev_err(dev, "Failed to add component: %d\n", ret);
    138
    139	return ret;
    140}
    141
    142static int mtk_disp_aal_remove(struct platform_device *pdev)
    143{
    144	component_del(&pdev->dev, &mtk_disp_aal_component_ops);
    145
    146	return 0;
    147}
    148
    149static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
    150	.has_gamma = true,
    151};
    152
    153static const struct of_device_id mtk_disp_aal_driver_dt_match[] = {
    154	{ .compatible = "mediatek,mt8173-disp-aal",
    155	  .data = &mt8173_aal_driver_data},
    156	{ .compatible = "mediatek,mt8183-disp-aal"},
    157	{},
    158};
    159MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);
    160
    161struct platform_driver mtk_disp_aal_driver = {
    162	.probe		= mtk_disp_aal_probe,
    163	.remove		= mtk_disp_aal_remove,
    164	.driver		= {
    165		.name	= "mediatek-disp-aal",
    166		.owner	= THIS_MODULE,
    167		.of_match_table = mtk_disp_aal_driver_dt_match,
    168	},
    169};