5 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
7 * IPUv3 Linux framebuffer:
9 * (C) Copyright 2004-2011 Freescale Semiconductor, Inc.
11 * SPDX-License-Identifier: GPL-2.0+
15 #include <asm/errno.h>
16 #include <linux/string.h>
17 #include <linux/list.h>
25 #include "videomodes.h"
27 DECLARE_GLOBAL_DATA_PTR;
29 static int mxcfb_map_video_memory(struct fb_info *fbi);
30 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
32 void lcd_initcolregs(void)
36 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
40 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
41 const struct fb_videomode *mode)
43 var->xres = mode->xres;
44 var->yres = mode->yres;
45 var->xres_virtual = mode->xres;
46 var->yres_virtual = mode->yres;
49 var->pixclock = mode->pixclock;
50 var->left_margin = mode->left_margin;
51 var->right_margin = mode->right_margin;
52 var->upper_margin = mode->upper_margin;
53 var->lower_margin = mode->lower_margin;
54 var->hsync_len = mode->hsync_len;
55 var->vsync_len = mode->vsync_len;
56 var->sync = mode->sync;
57 var->vmode = mode->vmode & FB_VMODE_MASK;
61 * Structure containing the MXC specific framebuffer information.
68 unsigned char overlay;
69 unsigned char alpha_chan_en;
70 dma_addr_t alpha_phy_addr0;
71 dma_addr_t alpha_phy_addr1;
72 void *alpha_virt_addr0;
73 void *alpha_virt_addr1;
74 uint32_t alpha_mem_len;
76 uint32_t cur_ipu_alpha_buf;
78 u32 pseudo_palette[16];
88 static unsigned long default_bpp = 16;
89 static unsigned char g_dp_in_use;
90 static struct fb_info *mxcfb_info[3];
91 static int ext_clk_used;
93 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
97 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
100 return fbi->var.nonstd;
102 switch (fbi->var.bits_per_pixel) {
104 pixfmt = IPU_PIX_FMT_BGR24;
107 pixfmt = IPU_PIX_FMT_BGR32;
110 pixfmt = IPU_PIX_FMT_RGB565;
113 pixfmt = IPU_PIX_FMT_GENERIC;
119 * Set fixed framebuffer parameters based on variable settings.
121 * @param info framebuffer information pointer
123 static int mxcfb_set_fix(struct fb_info *info)
125 struct fb_fix_screeninfo *fix = &info->fix;
126 struct fb_var_screeninfo *var = &info->var;
128 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
130 fix->type = FB_TYPE_PACKED_PIXELS;
131 fix->accel = FB_ACCEL_NONE;
132 fix->visual = FB_VISUAL_TRUECOLOR;
139 static int setup_disp_channel1(struct fb_info *fbi)
141 ipu_channel_params_t params;
142 struct mxcfb_info *mxc_fbi = fbi->par;
144 memset(¶ms, 0, sizeof(params));
145 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
147 debug("%s called\n", __func__);
149 * Assuming interlaced means yuv output, below setting also
150 * valid for mem_dc_sync. FG should have the same vmode as BG.
152 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
153 params.mem_dp_bg_sync.interlaced = 1;
154 params.mem_dp_bg_sync.out_pixel_fmt =
157 if (mxc_fbi->ipu_di_pix_fmt) {
158 params.mem_dp_bg_sync.out_pixel_fmt =
159 mxc_fbi->ipu_di_pix_fmt;
161 params.mem_dp_bg_sync.out_pixel_fmt =
165 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
166 if (mxc_fbi->alpha_chan_en)
167 params.mem_dp_bg_sync.alpha_chan_en = 1;
169 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms);
174 static int setup_disp_channel2(struct fb_info *fbi)
177 struct mxcfb_info *mxc_fbi = fbi->par;
179 mxc_fbi->cur_ipu_buf = 1;
180 if (mxc_fbi->alpha_chan_en)
181 mxc_fbi->cur_ipu_alpha_buf = 1;
183 fbi->var.xoffset = fbi->var.yoffset = 0;
185 debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
190 fbi->fix.line_length,
192 fbi->fix.smem_start +
193 (fbi->fix.line_length * fbi->var.yres) - 1);
195 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
197 fbi->var.xres, fbi->var.yres,
198 fbi->fix.line_length,
199 fbi->fix.smem_start +
200 (fbi->fix.line_length * fbi->var.yres),
204 printf("ipu_init_channel_buffer error %d\n", retval);
210 * Set framebuffer parameters and change the operating mode.
212 * @param info framebuffer information pointer
214 static int mxcfb_set_par(struct fb_info *fbi)
218 ipu_di_signal_cfg_t sig_cfg;
219 struct mxcfb_info *mxc_fbi = fbi->par;
220 uint32_t out_pixel_fmt;
222 ipu_disable_channel(mxc_fbi->ipu_ch);
223 ipu_uninit_channel(mxc_fbi->ipu_ch);
226 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
227 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
228 if (fbi->fix.smem_start)
229 mxcfb_unmap_video_memory(fbi);
231 if (mxcfb_map_video_memory(fbi) < 0)
235 setup_disp_channel1(fbi);
237 memset(&sig_cfg, 0, sizeof(sig_cfg));
238 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
239 sig_cfg.interlaced = 1;
240 out_pixel_fmt = IPU_PIX_FMT_YUV444;
242 if (mxc_fbi->ipu_di_pix_fmt)
243 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
245 out_pixel_fmt = IPU_PIX_FMT_RGB666;
247 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
248 sig_cfg.odd_field_first = 1;
249 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
251 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
252 sig_cfg.Hsync_pol = 1;
253 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
254 sig_cfg.Vsync_pol = 1;
255 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
257 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
258 sig_cfg.data_pol = 1;
259 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
260 sig_cfg.enable_pol = 1;
261 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
262 sig_cfg.clkidle_en = 1;
264 debug("pixclock = %lu.%03lu MHz\n",
265 PICOS2KHZ(fbi->var.pixclock) / 1000,
266 PICOS2KHZ(fbi->var.pixclock) % 1000);
268 retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
269 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
270 fbi->var.xres, fbi->var.yres,
272 fbi->var.left_margin,
274 fbi->var.right_margin,
275 fbi->var.upper_margin,
277 fbi->var.lower_margin,
280 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
284 retval = setup_disp_channel2(fbi);
288 if (mxc_fbi->blank == FB_BLANK_UNBLANK)
289 ipu_enable_channel(mxc_fbi->ipu_ch);
295 * Check framebuffer variable parameters and adjust to valid values.
297 * @param var framebuffer variable parameters
299 * @param info framebuffer information pointer
301 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
306 if (var->xres_virtual < var->xres)
307 var->xres_virtual = var->xres;
308 if (var->yres_virtual < var->yres)
309 var->yres_virtual = var->yres;
311 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
312 (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
313 var->bits_per_pixel = default_bpp;
315 switch (var->bits_per_pixel) {
319 var->red.msb_right = 0;
321 var->green.length = 3;
322 var->green.offset = 2;
323 var->green.msb_right = 0;
325 var->blue.length = 2;
326 var->blue.offset = 0;
327 var->blue.msb_right = 0;
329 var->transp.length = 0;
330 var->transp.offset = 0;
331 var->transp.msb_right = 0;
335 var->red.offset = 11;
336 var->red.msb_right = 0;
338 var->green.length = 6;
339 var->green.offset = 5;
340 var->green.msb_right = 0;
342 var->blue.length = 5;
343 var->blue.offset = 0;
344 var->blue.msb_right = 0;
346 var->transp.length = 0;
347 var->transp.offset = 0;
348 var->transp.msb_right = 0;
352 var->red.offset = 16;
353 var->red.msb_right = 0;
355 var->green.length = 8;
356 var->green.offset = 8;
357 var->green.msb_right = 0;
359 var->blue.length = 8;
360 var->blue.offset = 0;
361 var->blue.msb_right = 0;
363 var->transp.length = 0;
364 var->transp.offset = 0;
365 var->transp.msb_right = 0;
369 var->red.offset = 16;
370 var->red.msb_right = 0;
372 var->green.length = 8;
373 var->green.offset = 8;
374 var->green.msb_right = 0;
376 var->blue.length = 8;
377 var->blue.offset = 0;
378 var->blue.msb_right = 0;
380 var->transp.length = 8;
381 var->transp.offset = 24;
382 var->transp.msb_right = 0;
386 if (var->pixclock < 1000) {
387 htotal = var->xres + var->right_margin + var->hsync_len +
389 vtotal = var->yres + var->lower_margin + var->vsync_len +
391 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
392 var->pixclock = KHZ2PICOS(var->pixclock);
393 printf("pixclock set for 60Hz refresh = %u ps\n",
404 static int mxcfb_map_video_memory(struct fb_info *fbi)
406 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
407 fbi->fix.smem_len = fbi->var.yres_virtual *
408 fbi->fix.line_length;
411 fbi->screen_base = (void *)gd->fb_base;
413 fbi->screen_base = malloc(fbi->fix.smem_len);
414 if (fbi->screen_base == NULL) {
415 puts("Unable to allocate framebuffer memory\n");
416 fbi->fix.smem_len = 0;
419 fbi->fix.smem_start = (unsigned long)fbi->screen_base;
421 debug("allocated fb @ paddr=0x%08X, size=%d.\n",
422 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
424 fbi->screen_size = fbi->fix.smem_len;
429 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
431 fbi->screen_base = 0;
432 fbi->fix.smem_start = 0;
433 fbi->fix.smem_len = 0;
438 * Initializes the framebuffer information pointer. After allocating
439 * sufficient memory for the framebuffer structure, the fields are
440 * filled with custom information passed in from the configurable
441 * structures. This includes information such as bits per pixel,
442 * color maps, screen width/height and RGBA offsets.
444 * @return Framebuffer structure initialized with our information
446 static struct fb_info *mxcfb_init_fbinfo(void)
449 struct mxcfb_info *mxcfbi;
451 int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
452 sizeof(struct fb_info);
454 debug("%s: %d %d %d\n",
457 sizeof(struct mxcfb_info),
458 sizeof(struct fb_info));
460 * Allocate sufficient memory for the fb structure
470 fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
473 debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
476 fbi->var.activate = FB_ACTIVATE_NOW;
478 fbi->flags = FBINFO_FLAG_DEFAULT;
479 fbi->pseudo_palette = mxcfbi->pseudo_palette;
485 * Probe routine for the framebuffer driver. It is called during the
486 * driver binding process. The following functions are performed in
487 * this routine: Framebuffer initialization, Memory allocation and
488 * mapping, Framebuffer registration, IPU initialization.
490 * @return Appropriate error code to the kernel common code
492 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode, int di)
495 struct mxcfb_info *mxcfbi;
498 * Initialize FB structures
500 fbi = mxcfb_init_fbinfo();
507 mxcfbi->ipu_ch = MEM_BG_SYNC;
508 mxcfbi->blank = FB_BLANK_UNBLANK;
510 mxcfbi->ipu_ch = MEM_DC_SYNC;
511 mxcfbi->blank = FB_BLANK_POWERDOWN;
516 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
517 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
518 strcpy(fbi->fix.id, "DISP3 BG");
522 mxcfb_info[mxcfbi->ipu_di] = fbi;
524 /* Need dummy values until real panel is configured */
525 fbi->var.xres = panel_info.vl_col;
526 fbi->var.yres = panel_info.vl_row;
528 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
529 fb_videomode_to_var(&fbi->var, mode);
530 fbi->var.bits_per_pixel = NBITS(panel_info.vl_bpix);
531 fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
532 fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
534 mxcfb_check_var(&fbi->var, fbi);
536 /* Default Y virtual size is 2x panel size */
537 fbi->var.yres_virtual = fbi->var.yres * 2;
541 /* allocate fb first */
542 if (mxcfb_map_video_memory(fbi) < 0)
547 lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
549 debug("MXC IPUV3 configured\n"
550 "XRES = %d YRES = %d BitsXpixel = %d\n",
555 ipu_dump_registers();
560 ulong calc_fbsize(void)
562 return (panel_info.vl_col * panel_info.vl_row *
563 NBITS(panel_info.vl_bpix)) / 8;
566 int ipuv3_fb_init(struct fb_videomode *mode, int di, unsigned int interface_pix_fmt,
567 ipu_di_clk_parent_t di_clk_parent, unsigned long di_clk_val, int bpp)
573 ret = ipu_probe(di, di_clk_parent, di_clk_val);
575 printf("Error initializing IPU\n");
579 return mxcfb_probe(interface_pix_fmt, mode, di);