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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
54struct 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 */
62struct 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
72static 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
87static 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
97void 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
109void 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
118int 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
125void 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
132void 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
138void mtk_rdma_stop(struct device *dev)
139{
140 rdma_update_bits(dev, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN, 0);
141}
142
143void 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
175static 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
212unsigned int mtk_rdma_layer_nr(struct device *dev)
213{
214 return 1;
215}
216
217void 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
254static int mtk_disp_rdma_bind(struct device *dev, struct device *master,
255 void *data)
256{
257 return 0;
258
259}
260
261static void mtk_disp_rdma_unbind(struct device *dev, struct device *master,
262 void *data)
263{
264}
265
266static const struct component_ops mtk_disp_rdma_component_ops = {
267 .bind = mtk_disp_rdma_bind,
268 .unbind = mtk_disp_rdma_unbind,
269};
270
271static 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
337static 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
344static const struct mtk_disp_rdma_data mt2701_rdma_driver_data = {
345 .fifo_size = SZ_4K,
346};
347
348static const struct mtk_disp_rdma_data mt8173_rdma_driver_data = {
349 .fifo_size = SZ_8K,
350};
351
352static const struct mtk_disp_rdma_data mt8183_rdma_driver_data = {
353 .fifo_size = 5 * SZ_1K,
354};
355
356static 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};
365MODULE_DEVICE_TABLE(of, mtk_disp_rdma_driver_dt_match);
366
367struct 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};