1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2021 MediaTek Inc.
*/
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/soc/mediatek/mtk-cmdq.h>
#include "mtk_crtc.h"
#include "mtk_ddp_comp.h"
#include "mtk_disp_drv.h"
#include "mtk_drm_drv.h"
#define DISP_AAL_EN 0x0000
#define AAL_EN BIT(0)
#define DISP_AAL_CFG 0x0020
#define AAL_RELAY_MODE BIT(0)
#define AAL_GAMMA_LUT_EN BIT(1)
#define DISP_AAL_SIZE 0x0030
#define DISP_AAL_SIZE_HSIZE GENMASK(28, 16)
#define DISP_AAL_SIZE_VSIZE GENMASK(12, 0)
#define DISP_AAL_OUTPUT_SIZE 0x04d8
#define DISP_AAL_GAMMA_LUT 0x0700
#define DISP_AAL_GAMMA_LUT_R GENMASK(29, 20)
#define DISP_AAL_GAMMA_LUT_G GENMASK(19, 10)
#define DISP_AAL_GAMMA_LUT_B GENMASK(9, 0)
#define DISP_AAL_LUT_BITS 10
#define DISP_AAL_LUT_SIZE 512
struct mtk_disp_aal_data {
bool has_gamma;
};
/**
* struct mtk_disp_aal - Display Adaptive Ambient Light driver structure
* @clk: clock for DISP_AAL controller
* @regs: MMIO registers base
* @cmdq_reg: CMDQ Client register
* @data: platform specific data for DISP_AAL
*/
struct mtk_disp_aal {
struct clk *clk;
void __iomem *regs;
struct cmdq_client_reg cmdq_reg;
const struct mtk_disp_aal_data *data;
};
int mtk_aal_clk_enable(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
return clk_prepare_enable(aal->clk);
}
void mtk_aal_clk_disable(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
clk_disable_unprepare(aal->clk);
}
void mtk_aal_config(struct device *dev, unsigned int w,
unsigned int h, unsigned int vrefresh,
unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
u32 sz;
sz = FIELD_PREP(DISP_AAL_SIZE_HSIZE, w);
sz |= FIELD_PREP(DISP_AAL_SIZE_VSIZE, h);
mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE);
mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE);
}
/**
* mtk_aal_gamma_get_lut_size() - Get gamma LUT size for AAL
* @dev: Pointer to struct device
*
* Return: 0 if gamma control not supported in AAL or gamma LUT size
*/
unsigned int mtk_aal_gamma_get_lut_size(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
if (aal->data && aal->data->has_gamma)
return DISP_AAL_LUT_SIZE;
return 0;
}
void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
struct drm_color_lut *lut;
unsigned int i;
u32 cfg_val;
/* If gamma is not supported in AAL, go out immediately */
if (!(aal->data && aal->data->has_gamma))
return;
/* Also, if there's no gamma lut there's nothing to do here. */
if (!state->gamma_lut)
return;
lut = (struct drm_color_lut *)state->gamma_lut->data;
for (i = 0; i < DISP_AAL_LUT_SIZE; i++) {
struct drm_color_lut hwlut = {
.red = drm_color_lut_extract(lut[i].red, DISP_AAL_LUT_BITS),
.green = drm_color_lut_extract(lut[i].green, DISP_AAL_LUT_BITS),
.blue = drm_color_lut_extract(lut[i].blue, DISP_AAL_LUT_BITS)
};
u32 word;
word = FIELD_PREP(DISP_AAL_GAMMA_LUT_R, hwlut.red);
word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_G, hwlut.green);
word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_B, hwlut.blue);
writel(word, aal->regs + DISP_AAL_GAMMA_LUT + i * 4);
}
cfg_val = readl(aal->regs + DISP_AAL_CFG);
/* Enable the gamma table */
cfg_val |= FIELD_PREP(AAL_GAMMA_LUT_EN, 1);
/* Disable RELAY mode to pass the processed image */
cfg_val &= ~AAL_RELAY_MODE;
writel(cfg_val, aal->regs + DISP_AAL_CFG);
}
void mtk_aal_start(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
writel(AAL_EN, aal->regs + DISP_AAL_EN);
}
void mtk_aal_stop(struct device *dev)
{
struct mtk_disp_aal *aal = dev_get_drvdata(dev);
writel_relaxed(0x0, aal->regs + DISP_AAL_EN);
}
static int mtk_disp_aal_bind(struct device *dev, struct device *master,
void *data)
{
return 0;
}
static void mtk_disp_aal_unbind(struct device *dev, struct device *master,
void *data)
{
}
static const struct component_ops mtk_disp_aal_component_ops = {
.bind = mtk_disp_aal_bind,
.unbind = mtk_disp_aal_unbind,
};
static int mtk_disp_aal_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mtk_disp_aal *priv;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->clk = devm_clk_get(dev, NULL);
if (IS_ERR(priv->clk))
return dev_err_probe(dev, PTR_ERR(priv->clk),
"failed to get aal clk\n");
priv->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(priv->regs))
return dev_err_probe(dev, PTR_ERR(priv->regs),
"failed to ioremap aal\n");
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
if (ret)
dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
#endif
priv->data = of_device_get_match_data(dev);
platform_set_drvdata(pdev, priv);
ret = component_add(dev, &mtk_disp_aal_component_ops);
if (ret)
return dev_err_probe(dev, ret, "Failed to add component\n");
return 0;
}
static void mtk_disp_aal_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &mtk_disp_aal_component_ops);
}
static const struct mtk_disp_aal_data mt8173_aal_driver_data = {
.has_gamma = true,
};
static const struct of_device_id mtk_disp_aal_driver_dt_match[] = {
{ .compatible = "mediatek,mt8173-disp-aal", .data = &mt8173_aal_driver_data },
{ .compatible = "mediatek,mt8183-disp-aal" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match);
struct platform_driver mtk_disp_aal_driver = {
.probe = mtk_disp_aal_probe,
.remove = mtk_disp_aal_remove,
.driver = {
.name = "mediatek-disp-aal",
.of_match_table = mtk_disp_aal_driver_dt_match,
},
};
|
