1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (c) 2021 MediaTek Inc. |
4 | */ |
5 | |
6 | #include <linux/bitfield.h> |
7 | #include <linux/clk.h> |
8 | #include <linux/component.h> |
9 | #include <linux/module.h> |
10 | #include <linux/of.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 | #include "mtk_drm_drv.h" |
18 | |
19 | #define DISP_AAL_EN 0x0000 |
20 | #define AAL_EN BIT(0) |
21 | #define DISP_AAL_CFG 0x0020 |
22 | #define AAL_RELAY_MODE BIT(0) |
23 | #define AAL_GAMMA_LUT_EN BIT(1) |
24 | #define DISP_AAL_SIZE 0x0030 |
25 | #define DISP_AAL_SIZE_HSIZE GENMASK(28, 16) |
26 | #define DISP_AAL_SIZE_VSIZE GENMASK(12, 0) |
27 | #define DISP_AAL_OUTPUT_SIZE 0x04d8 |
28 | #define DISP_AAL_GAMMA_LUT 0x0700 |
29 | #define DISP_AAL_GAMMA_LUT_R GENMASK(29, 20) |
30 | #define DISP_AAL_GAMMA_LUT_G GENMASK(19, 10) |
31 | #define DISP_AAL_GAMMA_LUT_B GENMASK(9, 0) |
32 | #define DISP_AAL_LUT_BITS 10 |
33 | #define DISP_AAL_LUT_SIZE 512 |
34 | |
35 | struct mtk_disp_aal_data { |
36 | bool has_gamma; |
37 | }; |
38 | |
39 | /** |
40 | * struct mtk_disp_aal - Display Adaptive Ambient Light driver structure |
41 | * @clk: clock for DISP_AAL controller |
42 | * @regs: MMIO registers base |
43 | * @cmdq_reg: CMDQ Client register |
44 | * @data: platform specific data for DISP_AAL |
45 | */ |
46 | struct mtk_disp_aal { |
47 | struct clk *clk; |
48 | void __iomem *regs; |
49 | struct cmdq_client_reg cmdq_reg; |
50 | const struct mtk_disp_aal_data *data; |
51 | }; |
52 | |
53 | int mtk_aal_clk_enable(struct device *dev) |
54 | { |
55 | struct mtk_disp_aal *aal = dev_get_drvdata(dev); |
56 | |
57 | return clk_prepare_enable(clk: aal->clk); |
58 | } |
59 | |
60 | void mtk_aal_clk_disable(struct device *dev) |
61 | { |
62 | struct mtk_disp_aal *aal = dev_get_drvdata(dev); |
63 | |
64 | clk_disable_unprepare(clk: aal->clk); |
65 | } |
66 | |
67 | void mtk_aal_config(struct device *dev, unsigned int w, |
68 | unsigned int h, unsigned int vrefresh, |
69 | unsigned int bpc, struct cmdq_pkt *cmdq_pkt) |
70 | { |
71 | struct mtk_disp_aal *aal = dev_get_drvdata(dev); |
72 | u32 sz; |
73 | |
74 | sz = FIELD_PREP(DISP_AAL_SIZE_HSIZE, w); |
75 | sz |= FIELD_PREP(DISP_AAL_SIZE_VSIZE, h); |
76 | |
77 | mtk_ddp_write(cmdq_pkt, value: sz, cmdq_reg: &aal->cmdq_reg, regs: aal->regs, DISP_AAL_SIZE); |
78 | mtk_ddp_write(cmdq_pkt, value: sz, cmdq_reg: &aal->cmdq_reg, regs: aal->regs, DISP_AAL_OUTPUT_SIZE); |
79 | } |
80 | |
81 | /** |
82 | * mtk_aal_gamma_get_lut_size() - Get gamma LUT size for AAL |
83 | * @dev: Pointer to struct device |
84 | * |
85 | * Return: 0 if gamma control not supported in AAL or gamma LUT size |
86 | */ |
87 | unsigned int mtk_aal_gamma_get_lut_size(struct device *dev) |
88 | { |
89 | struct mtk_disp_aal *aal = dev_get_drvdata(dev); |
90 | |
91 | if (aal->data && aal->data->has_gamma) |
92 | return DISP_AAL_LUT_SIZE; |
93 | return 0; |
94 | } |
95 | |
96 | void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state) |
97 | { |
98 | struct mtk_disp_aal *aal = dev_get_drvdata(dev); |
99 | struct drm_color_lut *lut; |
100 | unsigned int i; |
101 | u32 cfg_val; |
102 | |
103 | /* If gamma is not supported in AAL, go out immediately */ |
104 | if (!(aal->data && aal->data->has_gamma)) |
105 | return; |
106 | |
107 | /* Also, if there's no gamma lut there's nothing to do here. */ |
108 | if (!state->gamma_lut) |
109 | return; |
110 | |
111 | lut = (struct drm_color_lut *)state->gamma_lut->data; |
112 | for (i = 0; i < DISP_AAL_LUT_SIZE; i++) { |
113 | struct drm_color_lut hwlut = { |
114 | .red = drm_color_lut_extract(user_input: lut[i].red, DISP_AAL_LUT_BITS), |
115 | .green = drm_color_lut_extract(user_input: lut[i].green, DISP_AAL_LUT_BITS), |
116 | .blue = drm_color_lut_extract(user_input: lut[i].blue, DISP_AAL_LUT_BITS) |
117 | }; |
118 | u32 word; |
119 | |
120 | word = FIELD_PREP(DISP_AAL_GAMMA_LUT_R, hwlut.red); |
121 | word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_G, hwlut.green); |
122 | word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_B, hwlut.blue); |
123 | writel(val: word, addr: aal->regs + DISP_AAL_GAMMA_LUT + i * 4); |
124 | } |
125 | |
126 | cfg_val = readl(addr: aal->regs + DISP_AAL_CFG); |
127 | |
128 | /* Enable the gamma table */ |
129 | cfg_val |= FIELD_PREP(AAL_GAMMA_LUT_EN, 1); |
130 | |
131 | /* Disable RELAY mode to pass the processed image */ |
132 | cfg_val &= ~AAL_RELAY_MODE; |
133 | |
134 | writel(val: cfg_val, addr: aal->regs + DISP_AAL_CFG); |
135 | } |
136 | |
137 | void mtk_aal_start(struct device *dev) |
138 | { |
139 | struct mtk_disp_aal *aal = dev_get_drvdata(dev); |
140 | |
141 | writel(AAL_EN, addr: aal->regs + DISP_AAL_EN); |
142 | } |
143 | |
144 | void mtk_aal_stop(struct device *dev) |
145 | { |
146 | struct mtk_disp_aal *aal = dev_get_drvdata(dev); |
147 | |
148 | writel_relaxed(0x0, aal->regs + DISP_AAL_EN); |
149 | } |
150 | |
151 | static int mtk_disp_aal_bind(struct device *dev, struct device *master, |
152 | void *data) |
153 | { |
154 | return 0; |
155 | } |
156 | |
157 | static void mtk_disp_aal_unbind(struct device *dev, struct device *master, |
158 | void *data) |
159 | { |
160 | } |
161 | |
162 | static const struct component_ops mtk_disp_aal_component_ops = { |
163 | .bind = mtk_disp_aal_bind, |
164 | .unbind = mtk_disp_aal_unbind, |
165 | }; |
166 | |
167 | static int mtk_disp_aal_probe(struct platform_device *pdev) |
168 | { |
169 | struct device *dev = &pdev->dev; |
170 | struct mtk_disp_aal *priv; |
171 | int ret; |
172 | |
173 | priv = devm_kzalloc(dev, size: sizeof(*priv), GFP_KERNEL); |
174 | if (!priv) |
175 | return -ENOMEM; |
176 | |
177 | priv->clk = devm_clk_get(dev, NULL); |
178 | if (IS_ERR(ptr: priv->clk)) { |
179 | dev_err(dev, "failed to get aal clk\n" ); |
180 | return PTR_ERR(ptr: priv->clk); |
181 | } |
182 | |
183 | priv->regs = devm_platform_ioremap_resource(pdev, index: 0); |
184 | if (IS_ERR(ptr: priv->regs)) { |
185 | dev_err(dev, "failed to ioremap aal\n" ); |
186 | return PTR_ERR(ptr: priv->regs); |
187 | } |
188 | |
189 | #if IS_REACHABLE(CONFIG_MTK_CMDQ) |
190 | ret = cmdq_dev_get_client_reg(dev, client_reg: &priv->cmdq_reg, idx: 0); |
191 | if (ret) |
192 | dev_dbg(dev, "get mediatek,gce-client-reg fail!\n" ); |
193 | #endif |
194 | |
195 | priv->data = of_device_get_match_data(dev); |
196 | platform_set_drvdata(pdev, data: priv); |
197 | |
198 | ret = component_add(dev, &mtk_disp_aal_component_ops); |
199 | if (ret) |
200 | dev_err(dev, "Failed to add component: %d\n" , ret); |
201 | |
202 | return ret; |
203 | } |
204 | |
205 | static void mtk_disp_aal_remove(struct platform_device *pdev) |
206 | { |
207 | component_del(&pdev->dev, &mtk_disp_aal_component_ops); |
208 | } |
209 | |
210 | static const struct mtk_disp_aal_data mt8173_aal_driver_data = { |
211 | .has_gamma = true, |
212 | }; |
213 | |
214 | static const struct of_device_id mtk_disp_aal_driver_dt_match[] = { |
215 | { .compatible = "mediatek,mt8173-disp-aal" , .data = &mt8173_aal_driver_data }, |
216 | { .compatible = "mediatek,mt8183-disp-aal" }, |
217 | { /* sentinel */ } |
218 | }; |
219 | MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match); |
220 | |
221 | struct platform_driver mtk_disp_aal_driver = { |
222 | .probe = mtk_disp_aal_probe, |
223 | .remove_new = mtk_disp_aal_remove, |
224 | .driver = { |
225 | .name = "mediatek-disp-aal" , |
226 | .owner = THIS_MODULE, |
227 | .of_match_table = mtk_disp_aal_driver_dt_match, |
228 | }, |
229 | }; |
230 | |