1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015 MediaTek Inc.
11 #include <linux/of_address.h>
12 #include <linux/of_irq.h>
13 #include <linux/of_platform.h>
14 #include <linux/platform_device.h>
16 #include "mtk_drm_drv.h"
17 #include "mtk_drm_plane.h"
18 #include "mtk_drm_ddp_comp.h"
19 #include "mtk_drm_crtc.h"
21 #define DISP_OD_EN 0x0000
22 #define DISP_OD_INTEN 0x0008
23 #define DISP_OD_INTSTA 0x000c
24 #define DISP_OD_CFG 0x0020
25 #define DISP_OD_SIZE 0x0030
26 #define DISP_DITHER_5 0x0114
27 #define DISP_DITHER_7 0x011c
28 #define DISP_DITHER_15 0x013c
29 #define DISP_DITHER_16 0x0140
31 #define DISP_REG_UFO_START 0x0000
33 #define DISP_AAL_EN 0x0000
34 #define DISP_AAL_SIZE 0x0030
36 #define DISP_CCORR_EN 0x0000
37 #define CCORR_EN BIT(0)
38 #define DISP_CCORR_CFG 0x0020
39 #define CCORR_RELAY_MODE BIT(0)
40 #define DISP_CCORR_SIZE 0x0030
42 #define DISP_DITHER_EN 0x0000
43 #define DITHER_EN BIT(0)
44 #define DISP_DITHER_CFG 0x0020
45 #define DITHER_RELAY_MODE BIT(0)
46 #define DISP_DITHER_SIZE 0x0030
48 #define DISP_GAMMA_EN 0x0000
49 #define DISP_GAMMA_CFG 0x0020
50 #define DISP_GAMMA_SIZE 0x0030
51 #define DISP_GAMMA_LUT 0x0700
53 #define LUT_10BIT_MASK 0x03ff
55 #define OD_RELAYMODE BIT(0)
57 #define UFO_BYPASS BIT(2)
61 #define GAMMA_EN BIT(0)
62 #define GAMMA_LUT_EN BIT(1)
64 #define DISP_DITHERING BIT(2)
65 #define DITHER_LSB_ERR_SHIFT_R(x) (((x) & 0x7) << 28)
66 #define DITHER_OVFLW_BIT_R(x) (((x) & 0x7) << 24)
67 #define DITHER_ADD_LSHIFT_R(x) (((x) & 0x7) << 20)
68 #define DITHER_ADD_RSHIFT_R(x) (((x) & 0x7) << 16)
69 #define DITHER_NEW_BIT_MODE BIT(0)
70 #define DITHER_LSB_ERR_SHIFT_B(x) (((x) & 0x7) << 28)
71 #define DITHER_OVFLW_BIT_B(x) (((x) & 0x7) << 24)
72 #define DITHER_ADD_LSHIFT_B(x) (((x) & 0x7) << 20)
73 #define DITHER_ADD_RSHIFT_B(x) (((x) & 0x7) << 16)
74 #define DITHER_LSB_ERR_SHIFT_G(x) (((x) & 0x7) << 12)
75 #define DITHER_OVFLW_BIT_G(x) (((x) & 0x7) << 8)
76 #define DITHER_ADD_LSHIFT_G(x) (((x) & 0x7) << 4)
77 #define DITHER_ADD_RSHIFT_G(x) (((x) & 0x7) << 0)
79 void mtk_dither_set(struct mtk_ddp_comp *comp, unsigned int bpc,
82 /* If bpc equal to 0, the dithering function didn't be enabled */
86 if (bpc >= MTK_MIN_BPC) {
87 writel(0, comp->regs + DISP_DITHER_5);
88 writel(0, comp->regs + DISP_DITHER_7);
89 writel(DITHER_LSB_ERR_SHIFT_R(MTK_MAX_BPC - bpc) |
90 DITHER_ADD_LSHIFT_R(MTK_MAX_BPC - bpc) |
92 comp->regs + DISP_DITHER_15);
93 writel(DITHER_LSB_ERR_SHIFT_B(MTK_MAX_BPC - bpc) |
94 DITHER_ADD_LSHIFT_B(MTK_MAX_BPC - bpc) |
95 DITHER_LSB_ERR_SHIFT_G(MTK_MAX_BPC - bpc) |
96 DITHER_ADD_LSHIFT_G(MTK_MAX_BPC - bpc),
97 comp->regs + DISP_DITHER_16);
98 writel(DISP_DITHERING, comp->regs + CFG);
102 static void mtk_od_config(struct mtk_ddp_comp *comp, unsigned int w,
103 unsigned int h, unsigned int vrefresh,
106 writel(w << 16 | h, comp->regs + DISP_OD_SIZE);
107 writel(OD_RELAYMODE, comp->regs + DISP_OD_CFG);
108 mtk_dither_set(comp, bpc, DISP_OD_CFG);
111 static void mtk_od_start(struct mtk_ddp_comp *comp)
113 writel(1, comp->regs + DISP_OD_EN);
116 static void mtk_ufoe_start(struct mtk_ddp_comp *comp)
118 writel(UFO_BYPASS, comp->regs + DISP_REG_UFO_START);
121 static void mtk_aal_config(struct mtk_ddp_comp *comp, unsigned int w,
122 unsigned int h, unsigned int vrefresh,
125 writel(h << 16 | w, comp->regs + DISP_AAL_SIZE);
128 static void mtk_aal_start(struct mtk_ddp_comp *comp)
130 writel(AAL_EN, comp->regs + DISP_AAL_EN);
133 static void mtk_aal_stop(struct mtk_ddp_comp *comp)
135 writel_relaxed(0x0, comp->regs + DISP_AAL_EN);
138 static void mtk_ccorr_config(struct mtk_ddp_comp *comp, unsigned int w,
139 unsigned int h, unsigned int vrefresh,
142 writel(h << 16 | w, comp->regs + DISP_CCORR_SIZE);
143 writel(CCORR_RELAY_MODE, comp->regs + DISP_CCORR_CFG);
146 static void mtk_ccorr_start(struct mtk_ddp_comp *comp)
148 writel(CCORR_EN, comp->regs + DISP_CCORR_EN);
151 static void mtk_ccorr_stop(struct mtk_ddp_comp *comp)
153 writel_relaxed(0x0, comp->regs + DISP_CCORR_EN);
156 static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
157 unsigned int h, unsigned int vrefresh,
160 writel(h << 16 | w, comp->regs + DISP_DITHER_SIZE);
161 writel(DITHER_RELAY_MODE, comp->regs + DISP_DITHER_CFG);
164 static void mtk_dither_start(struct mtk_ddp_comp *comp)
166 writel(DITHER_EN, comp->regs + DISP_DITHER_EN);
169 static void mtk_dither_stop(struct mtk_ddp_comp *comp)
171 writel_relaxed(0x0, comp->regs + DISP_DITHER_EN);
174 static void mtk_gamma_config(struct mtk_ddp_comp *comp, unsigned int w,
175 unsigned int h, unsigned int vrefresh,
178 writel(h << 16 | w, comp->regs + DISP_GAMMA_SIZE);
179 mtk_dither_set(comp, bpc, DISP_GAMMA_CFG);
182 static void mtk_gamma_start(struct mtk_ddp_comp *comp)
184 writel(GAMMA_EN, comp->regs + DISP_GAMMA_EN);
187 static void mtk_gamma_stop(struct mtk_ddp_comp *comp)
189 writel_relaxed(0x0, comp->regs + DISP_GAMMA_EN);
192 static void mtk_gamma_set(struct mtk_ddp_comp *comp,
193 struct drm_crtc_state *state)
196 struct drm_color_lut *lut;
197 void __iomem *lut_base;
200 if (state->gamma_lut) {
201 reg = readl(comp->regs + DISP_GAMMA_CFG);
202 reg = reg | GAMMA_LUT_EN;
203 writel(reg, comp->regs + DISP_GAMMA_CFG);
204 lut_base = comp->regs + DISP_GAMMA_LUT;
205 lut = (struct drm_color_lut *)state->gamma_lut->data;
206 for (i = 0; i < MTK_LUT_SIZE; i++) {
207 word = (((lut[i].red >> 6) & LUT_10BIT_MASK) << 20) +
208 (((lut[i].green >> 6) & LUT_10BIT_MASK) << 10) +
209 ((lut[i].blue >> 6) & LUT_10BIT_MASK);
210 writel(word, (lut_base + i * 4));
215 static const struct mtk_ddp_comp_funcs ddp_aal = {
216 .gamma_set = mtk_gamma_set,
217 .config = mtk_aal_config,
218 .start = mtk_aal_start,
219 .stop = mtk_aal_stop,
222 static const struct mtk_ddp_comp_funcs ddp_ccorr = {
223 .config = mtk_ccorr_config,
224 .start = mtk_ccorr_start,
225 .stop = mtk_ccorr_stop,
228 static const struct mtk_ddp_comp_funcs ddp_dither = {
229 .config = mtk_dither_config,
230 .start = mtk_dither_start,
231 .stop = mtk_dither_stop,
234 static const struct mtk_ddp_comp_funcs ddp_gamma = {
235 .gamma_set = mtk_gamma_set,
236 .config = mtk_gamma_config,
237 .start = mtk_gamma_start,
238 .stop = mtk_gamma_stop,
241 static const struct mtk_ddp_comp_funcs ddp_od = {
242 .config = mtk_od_config,
243 .start = mtk_od_start,
246 static const struct mtk_ddp_comp_funcs ddp_ufoe = {
247 .start = mtk_ufoe_start,
250 static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
251 [MTK_DISP_OVL] = "ovl",
252 [MTK_DISP_OVL_2L] = "ovl_2l",
253 [MTK_DISP_RDMA] = "rdma",
254 [MTK_DISP_WDMA] = "wdma",
255 [MTK_DISP_COLOR] = "color",
256 [MTK_DISP_CCORR] = "ccorr",
257 [MTK_DISP_AAL] = "aal",
258 [MTK_DISP_GAMMA] = "gamma",
259 [MTK_DISP_DITHER] = "dither",
260 [MTK_DISP_UFOE] = "ufoe",
263 [MTK_DISP_PWM] = "pwm",
264 [MTK_DISP_MUTEX] = "mutex",
265 [MTK_DISP_OD] = "od",
266 [MTK_DISP_BLS] = "bls",
269 struct mtk_ddp_comp_match {
270 enum mtk_ddp_comp_type type;
272 const struct mtk_ddp_comp_funcs *funcs;
275 static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
276 [DDP_COMPONENT_AAL0] = { MTK_DISP_AAL, 0, &ddp_aal },
277 [DDP_COMPONENT_AAL1] = { MTK_DISP_AAL, 1, &ddp_aal },
278 [DDP_COMPONENT_BLS] = { MTK_DISP_BLS, 0, NULL },
279 [DDP_COMPONENT_CCORR] = { MTK_DISP_CCORR, 0, &ddp_ccorr },
280 [DDP_COMPONENT_COLOR0] = { MTK_DISP_COLOR, 0, NULL },
281 [DDP_COMPONENT_COLOR1] = { MTK_DISP_COLOR, 1, NULL },
282 [DDP_COMPONENT_DITHER] = { MTK_DISP_DITHER, 0, &ddp_dither },
283 [DDP_COMPONENT_DPI0] = { MTK_DPI, 0, NULL },
284 [DDP_COMPONENT_DPI1] = { MTK_DPI, 1, NULL },
285 [DDP_COMPONENT_DSI0] = { MTK_DSI, 0, NULL },
286 [DDP_COMPONENT_DSI1] = { MTK_DSI, 1, NULL },
287 [DDP_COMPONENT_DSI2] = { MTK_DSI, 2, NULL },
288 [DDP_COMPONENT_DSI3] = { MTK_DSI, 3, NULL },
289 [DDP_COMPONENT_GAMMA] = { MTK_DISP_GAMMA, 0, &ddp_gamma },
290 [DDP_COMPONENT_OD0] = { MTK_DISP_OD, 0, &ddp_od },
291 [DDP_COMPONENT_OD1] = { MTK_DISP_OD, 1, &ddp_od },
292 [DDP_COMPONENT_OVL0] = { MTK_DISP_OVL, 0, NULL },
293 [DDP_COMPONENT_OVL1] = { MTK_DISP_OVL, 1, NULL },
294 [DDP_COMPONENT_OVL_2L0] = { MTK_DISP_OVL_2L, 0, NULL },
295 [DDP_COMPONENT_OVL_2L1] = { MTK_DISP_OVL_2L, 1, NULL },
296 [DDP_COMPONENT_PWM0] = { MTK_DISP_PWM, 0, NULL },
297 [DDP_COMPONENT_PWM1] = { MTK_DISP_PWM, 1, NULL },
298 [DDP_COMPONENT_PWM2] = { MTK_DISP_PWM, 2, NULL },
299 [DDP_COMPONENT_RDMA0] = { MTK_DISP_RDMA, 0, NULL },
300 [DDP_COMPONENT_RDMA1] = { MTK_DISP_RDMA, 1, NULL },
301 [DDP_COMPONENT_RDMA2] = { MTK_DISP_RDMA, 2, NULL },
302 [DDP_COMPONENT_UFOE] = { MTK_DISP_UFOE, 0, &ddp_ufoe },
303 [DDP_COMPONENT_WDMA0] = { MTK_DISP_WDMA, 0, NULL },
304 [DDP_COMPONENT_WDMA1] = { MTK_DISP_WDMA, 1, NULL },
307 int mtk_ddp_comp_get_id(struct device_node *node,
308 enum mtk_ddp_comp_type comp_type)
310 int id = of_alias_get_id(node, mtk_ddp_comp_stem[comp_type]);
313 for (i = 0; i < ARRAY_SIZE(mtk_ddp_matches); i++) {
314 if (comp_type == mtk_ddp_matches[i].type &&
315 (id < 0 || id == mtk_ddp_matches[i].alias_id))
322 int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
323 struct mtk_ddp_comp *comp, enum mtk_ddp_comp_id comp_id,
324 const struct mtk_ddp_comp_funcs *funcs)
326 enum mtk_ddp_comp_type type;
327 struct device_node *larb_node;
328 struct platform_device *larb_pdev;
330 if (comp_id < 0 || comp_id >= DDP_COMPONENT_ID_MAX)
333 type = mtk_ddp_matches[comp_id].type;
336 comp->funcs = funcs ?: mtk_ddp_matches[comp_id].funcs;
338 if (comp_id == DDP_COMPONENT_BLS ||
339 comp_id == DDP_COMPONENT_DPI0 ||
340 comp_id == DDP_COMPONENT_DPI1 ||
341 comp_id == DDP_COMPONENT_DSI0 ||
342 comp_id == DDP_COMPONENT_DSI1 ||
343 comp_id == DDP_COMPONENT_DSI2 ||
344 comp_id == DDP_COMPONENT_DSI3 ||
345 comp_id == DDP_COMPONENT_PWM0) {
352 comp->regs = of_iomap(node, 0);
353 comp->irq = of_irq_get(node, 0);
354 comp->clk = of_clk_get(node, 0);
355 if (IS_ERR(comp->clk))
356 return PTR_ERR(comp->clk);
358 /* Only DMA capable components need the LARB property */
359 comp->larb_dev = NULL;
360 if (type != MTK_DISP_OVL &&
361 type != MTK_DISP_RDMA &&
362 type != MTK_DISP_WDMA)
365 larb_node = of_parse_phandle(node, "mediatek,larb", 0);
368 "Missing mediadek,larb phandle in %pOF node\n", node);
372 larb_pdev = of_find_device_by_node(larb_node);
374 dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
375 of_node_put(larb_node);
376 return -EPROBE_DEFER;
378 of_node_put(larb_node);
380 comp->larb_dev = &larb_pdev->dev;
385 int mtk_ddp_comp_register(struct drm_device *drm, struct mtk_ddp_comp *comp)
387 struct mtk_drm_private *private = drm->dev_private;
389 if (private->ddp_comp[comp->id])
392 private->ddp_comp[comp->id] = comp;
396 void mtk_ddp_comp_unregister(struct drm_device *drm, struct mtk_ddp_comp *comp)
398 struct mtk_drm_private *private = drm->dev_private;
400 private->ddp_comp[comp->id] = NULL;