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};