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14#include <drm/drmP.h>
15#include <linux/clk.h>
16#include <linux/component.h>
17#include <linux/of_device.h>
18#include <linux/of_irq.h>
19#include <linux/platform_device.h>
20
21#include "mtk_drm_crtc.h"
22#include "mtk_drm_ddp_comp.h"
23
24#define DISP_REG_RDMA_INT_ENABLE 0x0000
25#define DISP_REG_RDMA_INT_STATUS 0x0004
26#define RDMA_TARGET_LINE_INT BIT(5)
27#define RDMA_FIFO_UNDERFLOW_INT BIT(4)
28#define RDMA_EOF_ABNORMAL_INT BIT(3)
29#define RDMA_FRAME_END_INT BIT(2)
30#define RDMA_FRAME_START_INT BIT(1)
31#define RDMA_REG_UPDATE_INT BIT(0)
32#define DISP_REG_RDMA_GLOBAL_CON 0x0010
33#define RDMA_ENGINE_EN BIT(0)
34#define DISP_REG_RDMA_SIZE_CON_0 0x0014
35#define DISP_REG_RDMA_SIZE_CON_1 0x0018
36#define DISP_REG_RDMA_TARGET_LINE 0x001c
37#define DISP_REG_RDMA_FIFO_CON 0x0040
38#define RDMA_FIFO_UNDERFLOW_EN BIT(31)
39#define RDMA_FIFO_PSEUDO_SIZE(bytes) (((bytes) / 16) << 16)
40#define RDMA_OUTPUT_VALID_FIFO_THRESHOLD(bytes) ((bytes) / 16)
41#define RDMA_FIFO_SIZE(rdma) ((rdma)->data->fifo_size)
42
43struct mtk_disp_rdma_data {
44 unsigned int fifo_size;
45};
46
47
48
49
50
51
52struct mtk_disp_rdma {
53 struct mtk_ddp_comp ddp_comp;
54 struct drm_crtc *crtc;
55 const struct mtk_disp_rdma_data *data;
56};
57
58static inline struct mtk_disp_rdma *comp_to_rdma(struct mtk_ddp_comp *comp)
59{
60 return container_of(comp, struct mtk_disp_rdma, ddp_comp);
61}
62
63static irqreturn_t mtk_disp_rdma_irq_handler(int irq, void *dev_id)
64{
65 struct mtk_disp_rdma *priv = dev_id;
66 struct mtk_ddp_comp *rdma = &priv->ddp_comp;
67
68
69 writel(0x0, rdma->regs + DISP_REG_RDMA_INT_STATUS);
70
71 if (!priv->crtc)
72 return IRQ_NONE;
73
74 mtk_crtc_ddp_irq(priv->crtc, rdma);
75
76 return IRQ_HANDLED;
77}
78
79static void rdma_update_bits(struct mtk_ddp_comp *comp, unsigned int reg,
80 unsigned int mask, unsigned int val)
81{
82 unsigned int tmp = readl(comp->regs + reg);
83
84 tmp = (tmp & ~mask) | (val & mask);
85 writel(tmp, comp->regs + reg);
86}
87
88static void mtk_rdma_enable_vblank(struct mtk_ddp_comp *comp,
89 struct drm_crtc *crtc)
90{
91 struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
92
93 rdma->crtc = crtc;
94 rdma_update_bits(comp, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT,
95 RDMA_FRAME_END_INT);
96}
97
98static void mtk_rdma_disable_vblank(struct mtk_ddp_comp *comp)
99{
100 struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
101
102 rdma->crtc = NULL;
103 rdma_update_bits(comp, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT, 0);
104}
105
106static void mtk_rdma_start(struct mtk_ddp_comp *comp)
107{
108 rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN,
109 RDMA_ENGINE_EN);
110}
111
112static void mtk_rdma_stop(struct mtk_ddp_comp *comp)
113{
114 rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN, 0);
115}
116
117static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width,
118 unsigned int height, unsigned int vrefresh,
119 unsigned int bpc)
120{
121 unsigned int threshold;
122 unsigned int reg;
123 struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
124
125 rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_0, 0xfff, width);
126 rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_1, 0xfffff, height);
127
128
129
130
131
132
133
134 threshold = width * height * vrefresh * 4 * 7 / 1000000;
135 reg = RDMA_FIFO_UNDERFLOW_EN |
136 RDMA_FIFO_PSEUDO_SIZE(RDMA_FIFO_SIZE(rdma)) |
137 RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold);
138 writel(reg, comp->regs + DISP_REG_RDMA_FIFO_CON);
139}
140
141static const struct mtk_ddp_comp_funcs mtk_disp_rdma_funcs = {
142 .config = mtk_rdma_config,
143 .start = mtk_rdma_start,
144 .stop = mtk_rdma_stop,
145 .enable_vblank = mtk_rdma_enable_vblank,
146 .disable_vblank = mtk_rdma_disable_vblank,
147};
148
149static int mtk_disp_rdma_bind(struct device *dev, struct device *master,
150 void *data)
151{
152 struct mtk_disp_rdma *priv = dev_get_drvdata(dev);
153 struct drm_device *drm_dev = data;
154 int ret;
155
156 ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp);
157 if (ret < 0) {
158 dev_err(dev, "Failed to register component %pOF: %d\n",
159 dev->of_node, ret);
160 return ret;
161 }
162
163 return 0;
164
165}
166
167static void mtk_disp_rdma_unbind(struct device *dev, struct device *master,
168 void *data)
169{
170 struct mtk_disp_rdma *priv = dev_get_drvdata(dev);
171 struct drm_device *drm_dev = data;
172
173 mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp);
174}
175
176static const struct component_ops mtk_disp_rdma_component_ops = {
177 .bind = mtk_disp_rdma_bind,
178 .unbind = mtk_disp_rdma_unbind,
179};
180
181static int mtk_disp_rdma_probe(struct platform_device *pdev)
182{
183 struct device *dev = &pdev->dev;
184 struct mtk_disp_rdma *priv;
185 int comp_id;
186 int irq;
187 int ret;
188
189 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
190 if (!priv)
191 return -ENOMEM;
192
193 irq = platform_get_irq(pdev, 0);
194 if (irq < 0)
195 return irq;
196
197 comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_RDMA);
198 if (comp_id < 0) {
199 dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
200 return comp_id;
201 }
202
203 ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
204 &mtk_disp_rdma_funcs);
205 if (ret) {
206 dev_err(dev, "Failed to initialize component: %d\n", ret);
207 return ret;
208 }
209
210
211 writel(0x0, priv->ddp_comp.regs + DISP_REG_RDMA_INT_ENABLE);
212 writel(0x0, priv->ddp_comp.regs + DISP_REG_RDMA_INT_STATUS);
213
214 ret = devm_request_irq(dev, irq, mtk_disp_rdma_irq_handler,
215 IRQF_TRIGGER_NONE, dev_name(dev), priv);
216 if (ret < 0) {
217 dev_err(dev, "Failed to request irq %d: %d\n", irq, ret);
218 return ret;
219 }
220
221 priv->data = of_device_get_match_data(dev);
222
223 platform_set_drvdata(pdev, priv);
224
225 ret = component_add(dev, &mtk_disp_rdma_component_ops);
226 if (ret)
227 dev_err(dev, "Failed to add component: %d\n", ret);
228
229 return ret;
230}
231
232static int mtk_disp_rdma_remove(struct platform_device *pdev)
233{
234 component_del(&pdev->dev, &mtk_disp_rdma_component_ops);
235
236 return 0;
237}
238
239static const struct mtk_disp_rdma_data mt2701_rdma_driver_data = {
240 .fifo_size = SZ_4K,
241};
242
243static const struct mtk_disp_rdma_data mt8173_rdma_driver_data = {
244 .fifo_size = SZ_8K,
245};
246
247static const struct of_device_id mtk_disp_rdma_driver_dt_match[] = {
248 { .compatible = "mediatek,mt2701-disp-rdma",
249 .data = &mt2701_rdma_driver_data},
250 { .compatible = "mediatek,mt8173-disp-rdma",
251 .data = &mt8173_rdma_driver_data},
252 {},
253};
254MODULE_DEVICE_TABLE(of, mtk_disp_rdma_driver_dt_match);
255
256struct platform_driver mtk_disp_rdma_driver = {
257 .probe = mtk_disp_rdma_probe,
258 .remove = mtk_disp_rdma_remove,
259 .driver = {
260 .name = "mediatek-disp-rdma",
261 .owner = THIS_MODULE,
262 .of_match_table = mtk_disp_rdma_driver_dt_match,
263 },
264};
265
