1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2015 MediaTek Inc.
4  */
5 
6 #include <linux/clk.h>
7 #include <linux/component.h>
8 #include <linux/module.h>
9 #include <linux/of_device.h>
10 #include <linux/of_irq.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 
18 #define DISP_REG_RDMA_INT_ENABLE		0x0000
19 #define DISP_REG_RDMA_INT_STATUS		0x0004
20 #define RDMA_TARGET_LINE_INT				BIT(5)
21 #define RDMA_FIFO_UNDERFLOW_INT				BIT(4)
22 #define RDMA_EOF_ABNORMAL_INT				BIT(3)
23 #define RDMA_FRAME_END_INT				BIT(2)
24 #define RDMA_FRAME_START_INT				BIT(1)
25 #define RDMA_REG_UPDATE_INT				BIT(0)
26 #define DISP_REG_RDMA_GLOBAL_CON		0x0010
27 #define RDMA_ENGINE_EN					BIT(0)
28 #define RDMA_MODE_MEMORY				BIT(1)
29 #define DISP_REG_RDMA_SIZE_CON_0		0x0014
30 #define RDMA_MATRIX_ENABLE				BIT(17)
31 #define RDMA_MATRIX_INT_MTX_SEL				GENMASK(23, 20)
32 #define RDMA_MATRIX_INT_MTX_BT601_to_RGB		(6 << 20)
33 #define DISP_REG_RDMA_SIZE_CON_1		0x0018
34 #define DISP_REG_RDMA_TARGET_LINE		0x001c
35 #define DISP_RDMA_MEM_CON			0x0024
36 #define MEM_MODE_INPUT_FORMAT_RGB565			(0x000 << 4)
37 #define MEM_MODE_INPUT_FORMAT_RGB888			(0x001 << 4)
38 #define MEM_MODE_INPUT_FORMAT_RGBA8888			(0x002 << 4)
39 #define MEM_MODE_INPUT_FORMAT_ARGB8888			(0x003 << 4)
40 #define MEM_MODE_INPUT_FORMAT_UYVY			(0x004 << 4)
41 #define MEM_MODE_INPUT_FORMAT_YUYV			(0x005 << 4)
42 #define MEM_MODE_INPUT_SWAP				BIT(8)
43 #define DISP_RDMA_MEM_SRC_PITCH			0x002c
44 #define DISP_RDMA_MEM_GMC_SETTING_0		0x0030
45 #define DISP_REG_RDMA_FIFO_CON			0x0040
46 #define RDMA_FIFO_UNDERFLOW_EN				BIT(31)
47 #define RDMA_FIFO_PSEUDO_SIZE(bytes)			(((bytes) / 16) << 16)
48 #define RDMA_OUTPUT_VALID_FIFO_THRESHOLD(bytes)		((bytes) / 16)
49 #define RDMA_FIFO_SIZE(rdma)			((rdma)->data->fifo_size)
50 #define DISP_RDMA_MEM_START_ADDR		0x0f00
51 
52 #define RDMA_MEM_GMC				0x40402020
53 
54 struct mtk_disp_rdma_data {
55 	unsigned int fifo_size;
56 };
57 
58 /*
59  * struct mtk_disp_rdma - DISP_RDMA driver structure
60  * @data: local driver data
61  */
62 struct mtk_disp_rdma {
63 	struct clk			*clk;
64 	void __iomem			*regs;
65 	struct cmdq_client_reg		cmdq_reg;
66 	const struct mtk_disp_rdma_data	*data;
67 	void				(*vblank_cb)(void *data);
68 	void				*vblank_cb_data;
69 	u32				fifo_size;
70 };
71 
72 static irqreturn_t mtk_disp_rdma_irq_handler(int irq, void *dev_id)
73 {
74 	struct mtk_disp_rdma *priv = dev_id;
75 
76 	/* Clear frame completion interrupt */
77 	writel(0x0, priv->regs + DISP_REG_RDMA_INT_STATUS);
78 
79 	if (!priv->vblank_cb)
80 		return IRQ_NONE;
81 
82 	priv->vblank_cb(priv->vblank_cb_data);
83 
84 	return IRQ_HANDLED;
85 }
86 
87 static void rdma_update_bits(struct device *dev, unsigned int reg,
88 			     unsigned int mask, unsigned int val)
89 {
90 	struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
91 	unsigned int tmp = readl(rdma->regs + reg);
92 
93 	tmp = (tmp & ~mask) | (val & mask);
94 	writel(tmp, rdma->regs + reg);
95 }
96 
97 void mtk_rdma_enable_vblank(struct device *dev,
98 			    void (*vblank_cb)(void *),
99 			    void *vblank_cb_data)
100 {
101 	struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
102 
103 	rdma->vblank_cb = vblank_cb;
104 	rdma->vblank_cb_data = vblank_cb_data;
105 	rdma_update_bits(dev, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT,
106 			 RDMA_FRAME_END_INT);
107 }
108 
109 void mtk_rdma_disable_vblank(struct device *dev)
110 {
111 	struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
112 
113 	rdma->vblank_cb = NULL;
114 	rdma->vblank_cb_data = NULL;
115 	rdma_update_bits(dev, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT, 0);
116 }
117 
118 int mtk_rdma_clk_enable(struct device *dev)
119 {
120 	struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
121 
122 	return clk_prepare_enable(rdma->clk);
123 }
124 
125 void mtk_rdma_clk_disable(struct device *dev)
126 {
127 	struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
128 
129 	clk_disable_unprepare(rdma->clk);
130 }
131 
132 void mtk_rdma_start(struct device *dev)
133 {
134 	rdma_update_bits(dev, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN,
135 			 RDMA_ENGINE_EN);
136 }
137 
138 void mtk_rdma_stop(struct device *dev)
139 {
140 	rdma_update_bits(dev, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN, 0);
141 }
142 
143 void mtk_rdma_config(struct device *dev, unsigned int width,
144 		     unsigned int height, unsigned int vrefresh,
145 		     unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
146 {
147 	unsigned int threshold;
148 	unsigned int reg;
149 	struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
150 	u32 rdma_fifo_size;
151 
152 	mtk_ddp_write_mask(cmdq_pkt, width, &rdma->cmdq_reg, rdma->regs,
153 			   DISP_REG_RDMA_SIZE_CON_0, 0xfff);
154 	mtk_ddp_write_mask(cmdq_pkt, height, &rdma->cmdq_reg, rdma->regs,
155 			   DISP_REG_RDMA_SIZE_CON_1, 0xfffff);
156 
157 	if (rdma->fifo_size)
158 		rdma_fifo_size = rdma->fifo_size;
159 	else
160 		rdma_fifo_size = RDMA_FIFO_SIZE(rdma);
161 
162 	/*
163 	 * Enable FIFO underflow since DSI and DPI can't be blocked.
164 	 * Keep the FIFO pseudo size reset default of 8 KiB. Set the
165 	 * output threshold to 6 microseconds with 7/6 overhead to
166 	 * account for blanking, and with a pixel depth of 4 bytes:
167 	 */
168 	threshold = width * height * vrefresh * 4 * 7 / 1000000;
169 	reg = RDMA_FIFO_UNDERFLOW_EN |
170 	      RDMA_FIFO_PSEUDO_SIZE(rdma_fifo_size) |
171 	      RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold);
172 	mtk_ddp_write(cmdq_pkt, reg, &rdma->cmdq_reg, rdma->regs, DISP_REG_RDMA_FIFO_CON);
173 }
174 
175 static unsigned int rdma_fmt_convert(struct mtk_disp_rdma *rdma,
176 				     unsigned int fmt)
177 {
178 	/* The return value in switch "MEM_MODE_INPUT_FORMAT_XXX"
179 	 * is defined in mediatek HW data sheet.
180 	 * The alphabet order in XXX is no relation to data
181 	 * arrangement in memory.
182 	 */
183 	switch (fmt) {
184 	default:
185 	case DRM_FORMAT_RGB565:
186 		return MEM_MODE_INPUT_FORMAT_RGB565;
187 	case DRM_FORMAT_BGR565:
188 		return MEM_MODE_INPUT_FORMAT_RGB565 | MEM_MODE_INPUT_SWAP;
189 	case DRM_FORMAT_RGB888:
190 		return MEM_MODE_INPUT_FORMAT_RGB888;
191 	case DRM_FORMAT_BGR888:
192 		return MEM_MODE_INPUT_FORMAT_RGB888 | MEM_MODE_INPUT_SWAP;
193 	case DRM_FORMAT_RGBX8888:
194 	case DRM_FORMAT_RGBA8888:
195 		return MEM_MODE_INPUT_FORMAT_ARGB8888;
196 	case DRM_FORMAT_BGRX8888:
197 	case DRM_FORMAT_BGRA8888:
198 		return MEM_MODE_INPUT_FORMAT_ARGB8888 | MEM_MODE_INPUT_SWAP;
199 	case DRM_FORMAT_XRGB8888:
200 	case DRM_FORMAT_ARGB8888:
201 		return MEM_MODE_INPUT_FORMAT_RGBA8888;
202 	case DRM_FORMAT_XBGR8888:
203 	case DRM_FORMAT_ABGR8888:
204 		return MEM_MODE_INPUT_FORMAT_RGBA8888 | MEM_MODE_INPUT_SWAP;
205 	case DRM_FORMAT_UYVY:
206 		return MEM_MODE_INPUT_FORMAT_UYVY;
207 	case DRM_FORMAT_YUYV:
208 		return MEM_MODE_INPUT_FORMAT_YUYV;
209 	}
210 }
211 
212 unsigned int mtk_rdma_layer_nr(struct device *dev)
213 {
214 	return 1;
215 }
216 
217 void mtk_rdma_layer_config(struct device *dev, unsigned int idx,
218 			   struct mtk_plane_state *state,
219 			   struct cmdq_pkt *cmdq_pkt)
220 {
221 	struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
222 	struct mtk_plane_pending_state *pending = &state->pending;
223 	unsigned int addr = pending->addr;
224 	unsigned int pitch = pending->pitch & 0xffff;
225 	unsigned int fmt = pending->format;
226 	unsigned int con;
227 
228 	con = rdma_fmt_convert(rdma, fmt);
229 	mtk_ddp_write_relaxed(cmdq_pkt, con, &rdma->cmdq_reg, rdma->regs, DISP_RDMA_MEM_CON);
230 
231 	if (fmt == DRM_FORMAT_UYVY || fmt == DRM_FORMAT_YUYV) {
232 		mtk_ddp_write_mask(cmdq_pkt, RDMA_MATRIX_ENABLE, &rdma->cmdq_reg, rdma->regs,
233 				   DISP_REG_RDMA_SIZE_CON_0,
234 				   RDMA_MATRIX_ENABLE);
235 		mtk_ddp_write_mask(cmdq_pkt, RDMA_MATRIX_INT_MTX_BT601_to_RGB,
236 				   &rdma->cmdq_reg, rdma->regs, DISP_REG_RDMA_SIZE_CON_0,
237 				   RDMA_MATRIX_INT_MTX_SEL);
238 	} else {
239 		mtk_ddp_write_mask(cmdq_pkt, 0, &rdma->cmdq_reg, rdma->regs,
240 				   DISP_REG_RDMA_SIZE_CON_0,
241 				   RDMA_MATRIX_ENABLE);
242 	}
243 	mtk_ddp_write_relaxed(cmdq_pkt, addr, &rdma->cmdq_reg, rdma->regs,
244 			      DISP_RDMA_MEM_START_ADDR);
245 	mtk_ddp_write_relaxed(cmdq_pkt, pitch, &rdma->cmdq_reg, rdma->regs,
246 			      DISP_RDMA_MEM_SRC_PITCH);
247 	mtk_ddp_write(cmdq_pkt, RDMA_MEM_GMC, &rdma->cmdq_reg, rdma->regs,
248 		      DISP_RDMA_MEM_GMC_SETTING_0);
249 	mtk_ddp_write_mask(cmdq_pkt, RDMA_MODE_MEMORY, &rdma->cmdq_reg, rdma->regs,
250 			   DISP_REG_RDMA_GLOBAL_CON, RDMA_MODE_MEMORY);
251 
252 }
253 
254 static int mtk_disp_rdma_bind(struct device *dev, struct device *master,
255 			      void *data)
256 {
257 	return 0;
258 
259 }
260 
261 static void mtk_disp_rdma_unbind(struct device *dev, struct device *master,
262 				 void *data)
263 {
264 }
265 
266 static const struct component_ops mtk_disp_rdma_component_ops = {
267 	.bind	= mtk_disp_rdma_bind,
268 	.unbind = mtk_disp_rdma_unbind,
269 };
270 
271 static int mtk_disp_rdma_probe(struct platform_device *pdev)
272 {
273 	struct device *dev = &pdev->dev;
274 	struct mtk_disp_rdma *priv;
275 	struct resource *res;
276 	int irq;
277 	int ret;
278 
279 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
280 	if (!priv)
281 		return -ENOMEM;
282 
283 	irq = platform_get_irq(pdev, 0);
284 	if (irq < 0)
285 		return irq;
286 
287 	priv->clk = devm_clk_get(dev, NULL);
288 	if (IS_ERR(priv->clk)) {
289 		dev_err(dev, "failed to get rdma clk\n");
290 		return PTR_ERR(priv->clk);
291 	}
292 
293 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
294 	priv->regs = devm_ioremap_resource(dev, res);
295 	if (IS_ERR(priv->regs)) {
296 		dev_err(dev, "failed to ioremap rdma\n");
297 		return PTR_ERR(priv->regs);
298 	}
299 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
300 	ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
301 	if (ret)
302 		dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
303 #endif
304 
305 	if (of_find_property(dev->of_node, "mediatek,rdma-fifo-size", &ret)) {
306 		ret = of_property_read_u32(dev->of_node,
307 					   "mediatek,rdma-fifo-size",
308 					   &priv->fifo_size);
309 		if (ret) {
310 			dev_err(dev, "Failed to get rdma fifo size\n");
311 			return ret;
312 		}
313 	}
314 
315 	/* Disable and clear pending interrupts */
316 	writel(0x0, priv->regs + DISP_REG_RDMA_INT_ENABLE);
317 	writel(0x0, priv->regs + DISP_REG_RDMA_INT_STATUS);
318 
319 	ret = devm_request_irq(dev, irq, mtk_disp_rdma_irq_handler,
320 			       IRQF_TRIGGER_NONE, dev_name(dev), priv);
321 	if (ret < 0) {
322 		dev_err(dev, "Failed to request irq %d: %d\n", irq, ret);
323 		return ret;
324 	}
325 
326 	priv->data = of_device_get_match_data(dev);
327 
328 	platform_set_drvdata(pdev, priv);
329 
330 	ret = component_add(dev, &mtk_disp_rdma_component_ops);
331 	if (ret)
332 		dev_err(dev, "Failed to add component: %d\n", ret);
333 
334 	return ret;
335 }
336 
337 static int mtk_disp_rdma_remove(struct platform_device *pdev)
338 {
339 	component_del(&pdev->dev, &mtk_disp_rdma_component_ops);
340 
341 	return 0;
342 }
343 
344 static const struct mtk_disp_rdma_data mt2701_rdma_driver_data = {
345 	.fifo_size = SZ_4K,
346 };
347 
348 static const struct mtk_disp_rdma_data mt8173_rdma_driver_data = {
349 	.fifo_size = SZ_8K,
350 };
351 
352 static const struct mtk_disp_rdma_data mt8183_rdma_driver_data = {
353 	.fifo_size = 5 * SZ_1K,
354 };
355 
356 static const struct of_device_id mtk_disp_rdma_driver_dt_match[] = {
357 	{ .compatible = "mediatek,mt2701-disp-rdma",
358 	  .data = &mt2701_rdma_driver_data},
359 	{ .compatible = "mediatek,mt8173-disp-rdma",
360 	  .data = &mt8173_rdma_driver_data},
361 	{ .compatible = "mediatek,mt8183-disp-rdma",
362 	  .data = &mt8183_rdma_driver_data},
363 	{},
364 };
365 MODULE_DEVICE_TABLE(of, mtk_disp_rdma_driver_dt_match);
366 
367 struct platform_driver mtk_disp_rdma_driver = {
368 	.probe		= mtk_disp_rdma_probe,
369 	.remove		= mtk_disp_rdma_remove,
370 	.driver		= {
371 		.name	= "mediatek-disp-rdma",
372 		.owner	= THIS_MODULE,
373 		.of_match_table = mtk_disp_rdma_driver_dt_match,
374 	},
375 };
376