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