1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Allwinner DE2 display driver
4 *
5 * (C) Copyright 2017 Jernej Skrabec <jernej.skrabec@siol.net>
6 */
7
8 #include <common.h>
9 #include <display.h>
10 #include <dm.h>
11 #include <edid.h>
12 #include <efi_loader.h>
13 #include <fdtdec.h>
14 #include <fdt_support.h>
15 #include <log.h>
16 #include <part.h>
17 #include <video.h>
18 #include <asm/global_data.h>
19 #include <asm/io.h>
20 #include <asm/arch/clock.h>
21 #include <asm/arch/display2.h>
22 #include <linux/bitops.h>
23 #include "simplefb_common.h"
24
25 DECLARE_GLOBAL_DATA_PTR;
26
27 enum {
28 /* Maximum LCD size we support */
29 LCD_MAX_WIDTH = 3840,
30 LCD_MAX_HEIGHT = 2160,
31 LCD_MAX_LOG2_BPP = VIDEO_BPP32,
32 };
33
sunxi_de2_composer_init(void)34 static void sunxi_de2_composer_init(void)
35 {
36 struct sunxi_ccm_reg * const ccm =
37 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
38
39 #ifdef CONFIG_MACH_SUN50I
40 u32 reg_value;
41
42 /* set SRAM for video use (A64 only) */
43 reg_value = readl(SUNXI_SRAMC_BASE + 0x04);
44 reg_value &= ~(0x01 << 24);
45 writel(reg_value, SUNXI_SRAMC_BASE + 0x04);
46 #endif
47
48 clock_set_pll10(432000000);
49
50 /* Set DE parent to pll10 */
51 clrsetbits_le32(&ccm->de_clk_cfg, CCM_DE2_CTRL_PLL_MASK,
52 CCM_DE2_CTRL_PLL10);
53
54 /* Set ahb gating to pass */
55 setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_DE);
56 setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_DE);
57
58 /* Clock on */
59 setbits_le32(&ccm->de_clk_cfg, CCM_DE2_CTRL_GATE);
60 }
61
sunxi_de2_mode_set(int mux,const struct display_timing * mode,int bpp,ulong address,bool is_composite)62 static void sunxi_de2_mode_set(int mux, const struct display_timing *mode,
63 int bpp, ulong address, bool is_composite)
64 {
65 ulong de_mux_base = (mux == 0) ?
66 SUNXI_DE2_MUX0_BASE : SUNXI_DE2_MUX1_BASE;
67 struct de_clk * const de_clk_regs =
68 (struct de_clk *)(SUNXI_DE2_BASE);
69 struct de_glb * const de_glb_regs =
70 (struct de_glb *)(de_mux_base +
71 SUNXI_DE2_MUX_GLB_REGS);
72 struct de_bld * const de_bld_regs =
73 (struct de_bld *)(de_mux_base +
74 SUNXI_DE2_MUX_BLD_REGS);
75 struct de_ui * const de_ui_regs =
76 (struct de_ui *)(de_mux_base +
77 SUNXI_DE2_MUX_CHAN_REGS +
78 SUNXI_DE2_MUX_CHAN_SZ * 1);
79 struct de_csc * const de_csc_regs =
80 (struct de_csc *)(de_mux_base +
81 SUNXI_DE2_MUX_DCSC_REGS);
82 u32 size = SUNXI_DE2_WH(mode->hactive.typ, mode->vactive.typ);
83 int channel;
84 u32 format;
85
86 /* enable clock */
87 #ifdef CONFIG_MACH_SUN8I_H3
88 setbits_le32(&de_clk_regs->rst_cfg, (mux == 0) ? 1 : 4);
89 #else
90 setbits_le32(&de_clk_regs->rst_cfg, BIT(mux));
91 #endif
92 setbits_le32(&de_clk_regs->gate_cfg, BIT(mux));
93 setbits_le32(&de_clk_regs->bus_cfg, BIT(mux));
94
95 clrbits_le32(&de_clk_regs->sel_cfg, 1);
96
97 writel(SUNXI_DE2_MUX_GLB_CTL_EN, &de_glb_regs->ctl);
98 writel(0, &de_glb_regs->status);
99 writel(1, &de_glb_regs->dbuff);
100 writel(size, &de_glb_regs->size);
101
102 for (channel = 0; channel < 4; channel++) {
103 void *ch = (void *)(de_mux_base + SUNXI_DE2_MUX_CHAN_REGS +
104 SUNXI_DE2_MUX_CHAN_SZ * channel);
105 memset(ch, 0, (channel == 0) ?
106 sizeof(struct de_vi) : sizeof(struct de_ui));
107 }
108 memset(de_bld_regs, 0, sizeof(struct de_bld));
109
110 writel(0x00000101, &de_bld_regs->fcolor_ctl);
111
112 writel(1, &de_bld_regs->route);
113
114 writel(0, &de_bld_regs->premultiply);
115 writel(0xff000000, &de_bld_regs->bkcolor);
116
117 writel(0x03010301, &de_bld_regs->bld_mode[0]);
118
119 writel(size, &de_bld_regs->output_size);
120 writel(mode->flags & DISPLAY_FLAGS_INTERLACED ? 2 : 0,
121 &de_bld_regs->out_ctl);
122 writel(0, &de_bld_regs->ck_ctl);
123
124 writel(0xff000000, &de_bld_regs->attr[0].fcolor);
125 writel(size, &de_bld_regs->attr[0].insize);
126
127 /* Disable all other units */
128 writel(0, de_mux_base + SUNXI_DE2_MUX_VSU_REGS);
129 writel(0, de_mux_base + SUNXI_DE2_MUX_GSU1_REGS);
130 writel(0, de_mux_base + SUNXI_DE2_MUX_GSU2_REGS);
131 writel(0, de_mux_base + SUNXI_DE2_MUX_GSU3_REGS);
132 writel(0, de_mux_base + SUNXI_DE2_MUX_FCE_REGS);
133 writel(0, de_mux_base + SUNXI_DE2_MUX_BWS_REGS);
134 writel(0, de_mux_base + SUNXI_DE2_MUX_LTI_REGS);
135 writel(0, de_mux_base + SUNXI_DE2_MUX_PEAK_REGS);
136 writel(0, de_mux_base + SUNXI_DE2_MUX_ASE_REGS);
137 writel(0, de_mux_base + SUNXI_DE2_MUX_FCC_REGS);
138
139 if (is_composite) {
140 /* set CSC coefficients */
141 writel(0x107, &de_csc_regs->coef11);
142 writel(0x204, &de_csc_regs->coef12);
143 writel(0x64, &de_csc_regs->coef13);
144 writel(0x4200, &de_csc_regs->coef14);
145 writel(0x1f68, &de_csc_regs->coef21);
146 writel(0x1ed6, &de_csc_regs->coef22);
147 writel(0x1c2, &de_csc_regs->coef23);
148 writel(0x20200, &de_csc_regs->coef24);
149 writel(0x1c2, &de_csc_regs->coef31);
150 writel(0x1e87, &de_csc_regs->coef32);
151 writel(0x1fb7, &de_csc_regs->coef33);
152 writel(0x20200, &de_csc_regs->coef34);
153
154 /* enable CSC unit */
155 writel(1, &de_csc_regs->csc_ctl);
156 } else {
157 writel(0, &de_csc_regs->csc_ctl);
158 }
159
160 switch (bpp) {
161 case 16:
162 format = SUNXI_DE2_UI_CFG_ATTR_FMT(SUNXI_DE2_FORMAT_RGB_565);
163 break;
164 case 32:
165 default:
166 format = SUNXI_DE2_UI_CFG_ATTR_FMT(SUNXI_DE2_FORMAT_XRGB_8888);
167 break;
168 }
169
170 writel(SUNXI_DE2_UI_CFG_ATTR_EN | format, &de_ui_regs->cfg[0].attr);
171 writel(size, &de_ui_regs->cfg[0].size);
172 writel(0, &de_ui_regs->cfg[0].coord);
173 writel((bpp / 8) * mode->hactive.typ, &de_ui_regs->cfg[0].pitch);
174 writel(address, &de_ui_regs->cfg[0].top_laddr);
175 writel(size, &de_ui_regs->ovl_size);
176
177 /* apply settings */
178 writel(1, &de_glb_regs->dbuff);
179 }
180
sunxi_de2_init(struct udevice * dev,ulong fbbase,enum video_log2_bpp l2bpp,struct udevice * disp,int mux,bool is_composite)181 static int sunxi_de2_init(struct udevice *dev, ulong fbbase,
182 enum video_log2_bpp l2bpp,
183 struct udevice *disp, int mux, bool is_composite)
184 {
185 struct video_priv *uc_priv = dev_get_uclass_priv(dev);
186 struct display_timing timing;
187 struct display_plat *disp_uc_plat;
188 int ret;
189
190 disp_uc_plat = dev_get_uclass_plat(disp);
191 debug("Using device '%s', disp_uc_priv=%p\n", disp->name, disp_uc_plat);
192 if (display_in_use(disp)) {
193 debug(" - device in use\n");
194 return -EBUSY;
195 }
196
197 disp_uc_plat->source_id = mux;
198
199 ret = display_read_timing(disp, &timing);
200 if (ret) {
201 debug("%s: Failed to read timings\n", __func__);
202 return ret;
203 }
204
205 sunxi_de2_composer_init();
206 sunxi_de2_mode_set(mux, &timing, 1 << l2bpp, fbbase, is_composite);
207
208 ret = display_enable(disp, 1 << l2bpp, &timing);
209 if (ret) {
210 debug("%s: Failed to enable display\n", __func__);
211 return ret;
212 }
213
214 uc_priv->xsize = timing.hactive.typ;
215 uc_priv->ysize = timing.vactive.typ;
216 uc_priv->bpix = l2bpp;
217 debug("fb=%lx, size=%d %d\n", fbbase, uc_priv->xsize, uc_priv->ysize);
218
219 #ifdef CONFIG_EFI_LOADER
220 efi_add_memory_map(fbbase,
221 timing.hactive.typ * timing.vactive.typ *
222 (1 << l2bpp) / 8,
223 EFI_RESERVED_MEMORY_TYPE);
224 #endif
225
226 return 0;
227 }
228
sunxi_de2_probe(struct udevice * dev)229 static int sunxi_de2_probe(struct udevice *dev)
230 {
231 struct video_uc_plat *plat = dev_get_uclass_plat(dev);
232 struct udevice *disp;
233 int ret;
234
235 /* Before relocation we don't need to do anything */
236 if (!(gd->flags & GD_FLG_RELOC))
237 return 0;
238
239 ret = uclass_get_device_by_driver(UCLASS_DISPLAY,
240 DM_DRIVER_GET(sunxi_lcd), &disp);
241 if (!ret) {
242 int mux;
243
244 mux = 0;
245
246 ret = sunxi_de2_init(dev, plat->base, VIDEO_BPP32, disp, mux,
247 false);
248 if (!ret) {
249 video_set_flush_dcache(dev, 1);
250 return 0;
251 }
252 }
253
254 debug("%s: lcd display not found (ret=%d)\n", __func__, ret);
255
256 ret = uclass_get_device_by_driver(UCLASS_DISPLAY,
257 DM_DRIVER_GET(sunxi_dw_hdmi), &disp);
258 if (!ret) {
259 int mux;
260 if (IS_ENABLED(CONFIG_MACH_SUNXI_H3_H5))
261 mux = 0;
262 else
263 mux = 1;
264
265 ret = sunxi_de2_init(dev, plat->base, VIDEO_BPP32, disp, mux,
266 false);
267 if (!ret) {
268 video_set_flush_dcache(dev, 1);
269 return 0;
270 }
271 }
272
273 debug("%s: hdmi display not found (ret=%d)\n", __func__, ret);
274
275 return -ENODEV;
276 }
277
sunxi_de2_bind(struct udevice * dev)278 static int sunxi_de2_bind(struct udevice *dev)
279 {
280 struct video_uc_plat *plat = dev_get_uclass_plat(dev);
281
282 plat->size = LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
283 (1 << LCD_MAX_LOG2_BPP) / 8;
284
285 return 0;
286 }
287
288 static const struct video_ops sunxi_de2_ops = {
289 };
290
291 U_BOOT_DRIVER(sunxi_de2) = {
292 .name = "sunxi_de2",
293 .id = UCLASS_VIDEO,
294 .ops = &sunxi_de2_ops,
295 .bind = sunxi_de2_bind,
296 .probe = sunxi_de2_probe,
297 .flags = DM_FLAG_PRE_RELOC,
298 };
299
300 U_BOOT_DRVINFO(sunxi_de2) = {
301 .name = "sunxi_de2"
302 };
303
304 /*
305 * Simplefb support.
306 */
307 #if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_VIDEO_DT_SIMPLEFB)
sunxi_simplefb_setup(void * blob)308 int sunxi_simplefb_setup(void *blob)
309 {
310 struct udevice *de2, *hdmi, *lcd;
311 struct video_priv *de2_priv;
312 struct video_uc_plat *de2_plat;
313 int mux;
314 int offset, ret;
315 u64 start, size;
316 const char *pipeline = NULL;
317
318 debug("Setting up simplefb\n");
319
320 if (IS_ENABLED(CONFIG_MACH_SUNXI_H3_H5))
321 mux = 0;
322 else
323 mux = 1;
324
325 /* Skip simplefb setting if DE2 / HDMI is not present */
326 ret = uclass_get_device_by_driver(UCLASS_VIDEO,
327 DM_DRIVER_GET(sunxi_de2), &de2);
328 if (ret) {
329 debug("DE2 not present\n");
330 return 0;
331 } else if (!device_active(de2)) {
332 debug("DE2 present but not probed\n");
333 return 0;
334 }
335
336 ret = uclass_get_device_by_driver(UCLASS_DISPLAY,
337 DM_DRIVER_GET(sunxi_dw_hdmi), &hdmi);
338 if (ret) {
339 debug("HDMI not present\n");
340 } else if (device_active(hdmi)) {
341 if (mux == 0)
342 pipeline = "mixer0-lcd0-hdmi";
343 else
344 pipeline = "mixer1-lcd1-hdmi";
345 } else {
346 debug("HDMI present but not probed\n");
347 }
348
349 ret = uclass_get_device_by_driver(UCLASS_DISPLAY,
350 DM_DRIVER_GET(sunxi_lcd), &lcd);
351 if (ret)
352 debug("LCD not present\n");
353 else if (device_active(lcd))
354 pipeline = "mixer0-lcd0";
355 else
356 debug("LCD present but not probed\n");
357
358 if (!pipeline) {
359 debug("No active display present\n");
360 return 0;
361 }
362
363 de2_priv = dev_get_uclass_priv(de2);
364 de2_plat = dev_get_uclass_plat(de2);
365
366 offset = sunxi_simplefb_fdt_match(blob, pipeline);
367 if (offset < 0) {
368 eprintf("Cannot setup simplefb: node not found\n");
369 return 0; /* Keep older kernels working */
370 }
371
372 start = gd->bd->bi_dram[0].start;
373 size = de2_plat->base - start;
374 ret = fdt_fixup_memory_banks(blob, &start, &size, 1);
375 if (ret) {
376 eprintf("Cannot setup simplefb: Error reserving memory\n");
377 return ret;
378 }
379
380 ret = fdt_setup_simplefb_node(blob, offset, de2_plat->base,
381 de2_priv->xsize, de2_priv->ysize,
382 VNBYTES(de2_priv->bpix) * de2_priv->xsize,
383 "x8r8g8b8");
384 if (ret)
385 eprintf("Cannot setup simplefb: Error setting properties\n");
386
387 return ret;
388 }
389 #endif /* CONFIG_OF_BOARD_SETUP && CONFIG_VIDEO_DT_SIMPLEFB */
390