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_CCORR_EN				0x0000
19#define CCORR_EN					BIT(0)
20#define DISP_CCORR_CFG				0x0020
21#define CCORR_RELAY_MODE				BIT(0)
22#define CCORR_ENGINE_EN					BIT(1)
23#define CCORR_GAMMA_OFF					BIT(2)
24#define CCORR_WGAMUT_SRC_CLIP				BIT(3)
25#define DISP_CCORR_SIZE				0x0030
26#define DISP_CCORR_COEF_0			0x0080
27#define DISP_CCORR_COEF_1			0x0084
28#define DISP_CCORR_COEF_2			0x0088
29#define DISP_CCORR_COEF_3			0x008C
30#define DISP_CCORR_COEF_4			0x0090
31
32struct mtk_disp_ccorr_data {
33	u32 matrix_bits;
34};
35
36struct mtk_disp_ccorr {
37	struct clk *clk;
38	void __iomem *regs;
39	struct cmdq_client_reg cmdq_reg;
40	const struct mtk_disp_ccorr_data	*data;
41};
42
43int mtk_ccorr_clk_enable(struct device *dev)
44{
45	struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);
46
47	return clk_prepare_enable(ccorr->clk);
48}
49
50void mtk_ccorr_clk_disable(struct device *dev)
51{
52	struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);
53
54	clk_disable_unprepare(ccorr->clk);
55}
56
57void mtk_ccorr_config(struct device *dev, unsigned int w,
58			     unsigned int h, unsigned int vrefresh,
59			     unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
60{
61	struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);
62
63	mtk_ddp_write(cmdq_pkt, w << 16 | h, &ccorr->cmdq_reg, ccorr->regs,
64		      DISP_CCORR_SIZE);
65	mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, &ccorr->cmdq_reg, ccorr->regs,
66		      DISP_CCORR_CFG);
67}
68
69void mtk_ccorr_start(struct device *dev)
70{
71	struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);
72
73	writel(CCORR_EN, ccorr->regs + DISP_CCORR_EN);
74}
75
76void mtk_ccorr_stop(struct device *dev)
77{
78	struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);
79
80	writel_relaxed(0x0, ccorr->regs + DISP_CCORR_EN);
81}
82
83/* Converts a DRM S31.32 value to the HW S1.n format. */
84static u16 mtk_ctm_s31_32_to_s1_n(u64 in, u32 n)
85{
86	u16 r;
87
88	/* Sign bit. */
89	r = in & BIT_ULL(63) ? BIT(n + 1) : 0;
90
91	if ((in & GENMASK_ULL(62, 33)) > 0) {
92		/* identity value 0x100000000 -> 0x400(mt8183), */
93		/* identity value 0x100000000 -> 0x800(mt8192), */
94		/* if bigger this, set it to max 0x7ff. */
95		r |= GENMASK(n, 0);
96	} else {
97		/* take the n+1 most important bits. */
98		r |= (in >> (32 - n)) & GENMASK(n, 0);
99	}
100
101	return r;
102}
103
104void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state)
105{
106	struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev);
107	struct drm_property_blob *blob = state->ctm;
108	struct drm_color_ctm *ctm;
109	const u64 *input;
110	uint16_t coeffs[9] = { 0 };
111	int i;
112	struct cmdq_pkt *cmdq_pkt = NULL;
113	u32 matrix_bits = ccorr->data->matrix_bits;
114
115	if (!blob)
116		return;
117
118	ctm = (struct drm_color_ctm *)blob->data;
119	input = ctm->matrix;
120
121	for (i = 0; i < ARRAY_SIZE(coeffs); i++)
122		coeffs[i] = mtk_ctm_s31_32_to_s1_n(input[i], matrix_bits);
123
124	mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
125		      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_0);
126	mtk_ddp_write(cmdq_pkt, coeffs[2] << 16 | coeffs[3],
127		      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_1);
128	mtk_ddp_write(cmdq_pkt, coeffs[4] << 16 | coeffs[5],
129		      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_2);
130	mtk_ddp_write(cmdq_pkt, coeffs[6] << 16 | coeffs[7],
131		      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_3);
132	mtk_ddp_write(cmdq_pkt, coeffs[8] << 16,
133		      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_4);
134}
135
136static int mtk_disp_ccorr_bind(struct device *dev, struct device *master,
137			       void *data)
138{
139	return 0;
140}
141
142static void mtk_disp_ccorr_unbind(struct device *dev, struct device *master,
143				  void *data)
144{
145}
146
147static const struct component_ops mtk_disp_ccorr_component_ops = {
148	.bind	= mtk_disp_ccorr_bind,
149	.unbind	= mtk_disp_ccorr_unbind,
150};
151
152static int mtk_disp_ccorr_probe(struct platform_device *pdev)
153{
154	struct device *dev = &pdev->dev;
155	struct mtk_disp_ccorr *priv;
156	int ret;
157
158	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
159	if (!priv)
160		return -ENOMEM;
161
162	priv->clk = devm_clk_get(dev, NULL);
163	if (IS_ERR(priv->clk)) {
164		dev_err(dev, "failed to get ccorr clk\n");
165		return PTR_ERR(priv->clk);
166	}
167
168	priv->regs = devm_platform_ioremap_resource(pdev, 0);
169	if (IS_ERR(priv->regs)) {
170		dev_err(dev, "failed to ioremap ccorr\n");
171		return PTR_ERR(priv->regs);
172	}
173
174#if IS_REACHABLE(CONFIG_MTK_CMDQ)
175	ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
176	if (ret)
177		dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
178#endif
179
180	priv->data = of_device_get_match_data(dev);
181	platform_set_drvdata(pdev, priv);
182
183	ret = component_add(dev, &mtk_disp_ccorr_component_ops);
184	if (ret)
185		dev_err(dev, "Failed to add component: %d\n", ret);
186
187	return ret;
188}
189
190static void mtk_disp_ccorr_remove(struct platform_device *pdev)
191{
192	component_del(&pdev->dev, &mtk_disp_ccorr_component_ops);
193}
194
195static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = {
196	.matrix_bits = 10,
197};
198
199static const struct mtk_disp_ccorr_data mt8192_ccorr_driver_data = {
200	.matrix_bits = 11,
201};
202
203static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] = {
204	{ .compatible = "mediatek,mt8183-disp-ccorr",
205	  .data = &mt8183_ccorr_driver_data},
206	{ .compatible = "mediatek,mt8192-disp-ccorr",
207	  .data = &mt8192_ccorr_driver_data},
208	{},
209};
210MODULE_DEVICE_TABLE(of, mtk_disp_ccorr_driver_dt_match);
211
212struct platform_driver mtk_disp_ccorr_driver = {
213	.probe		= mtk_disp_ccorr_probe,
214	.remove_new	= mtk_disp_ccorr_remove,
215	.driver		= {
216		.name	= "mediatek-disp-ccorr",
217		.owner	= THIS_MODULE,
218		.of_match_table = mtk_disp_ccorr_driver_dt_match,
219	},
220};
221