5 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
7 * MX51 Linux framebuffer:
9 * (C) Copyright 2004-2010 Freescale Semiconductor, Inc.
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/errno.h>
32 #include <linux/string.h>
33 #include <linux/list.h>
38 #include "videomodes.h"
42 static int mxcfb_map_video_memory(struct fb_info *fbi);
43 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
46 static GraphicDevice panel;
47 struct fb_videomode *gmode;
49 void fb_videomode_to_var(struct fb_var_screeninfo *var,
50 const struct fb_videomode *mode)
52 var->xres = mode->xres;
53 var->yres = mode->yres;
54 var->xres_virtual = mode->xres;
55 var->yres_virtual = mode->yres;
58 var->pixclock = mode->pixclock;
59 var->left_margin = mode->left_margin;
60 var->right_margin = mode->right_margin;
61 var->upper_margin = mode->upper_margin;
62 var->lower_margin = mode->lower_margin;
63 var->hsync_len = mode->hsync_len;
64 var->vsync_len = mode->vsync_len;
65 var->sync = mode->sync;
66 var->vmode = mode->vmode & FB_VMODE_MASK;
70 * Structure containing the MXC specific framebuffer information.
77 unsigned char overlay;
78 unsigned char alpha_chan_en;
79 dma_addr_t alpha_phy_addr0;
80 dma_addr_t alpha_phy_addr1;
81 void *alpha_virt_addr0;
82 void *alpha_virt_addr1;
83 uint32_t alpha_mem_len;
85 uint32_t cur_ipu_alpha_buf;
87 u32 pseudo_palette[16];
97 static unsigned long default_bpp = 16;
98 static unsigned char g_dp_in_use;
99 static struct fb_info *mxcfb_info[3];
100 static int ext_clk_used;
102 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
106 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
109 return fbi->var.nonstd;
111 switch (fbi->var.bits_per_pixel) {
113 pixfmt = IPU_PIX_FMT_BGR24;
116 pixfmt = IPU_PIX_FMT_BGR32;
119 pixfmt = IPU_PIX_FMT_RGB565;
126 * Set fixed framebuffer parameters based on variable settings.
128 * @param info framebuffer information pointer
130 static int mxcfb_set_fix(struct fb_info *info)
132 struct fb_fix_screeninfo *fix = &info->fix;
133 struct fb_var_screeninfo *var = &info->var;
135 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
137 fix->type = FB_TYPE_PACKED_PIXELS;
138 fix->accel = FB_ACCEL_NONE;
139 fix->visual = FB_VISUAL_TRUECOLOR;
146 static int setup_disp_channel1(struct fb_info *fbi)
148 ipu_channel_params_t params;
149 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
151 memset(¶ms, 0, sizeof(params));
152 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
154 debug("%s called\n", __func__);
156 * Assuming interlaced means yuv output, below setting also
157 * valid for mem_dc_sync. FG should have the same vmode as BG.
159 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
160 params.mem_dp_bg_sync.interlaced = 1;
161 params.mem_dp_bg_sync.out_pixel_fmt =
164 if (mxc_fbi->ipu_di_pix_fmt) {
165 params.mem_dp_bg_sync.out_pixel_fmt =
166 mxc_fbi->ipu_di_pix_fmt;
168 params.mem_dp_bg_sync.out_pixel_fmt =
172 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
173 if (mxc_fbi->alpha_chan_en)
174 params.mem_dp_bg_sync.alpha_chan_en = 1;
176 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms);
181 static int setup_disp_channel2(struct fb_info *fbi)
184 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
186 mxc_fbi->cur_ipu_buf = 1;
187 if (mxc_fbi->alpha_chan_en)
188 mxc_fbi->cur_ipu_alpha_buf = 1;
190 fbi->var.xoffset = fbi->var.yoffset = 0;
192 debug("%s: %x %d %d %d %lx %lx\n",
197 fbi->fix.line_length,
199 fbi->fix.smem_start +
200 (fbi->fix.line_length * fbi->var.yres));
202 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
204 fbi->var.xres, fbi->var.yres,
205 fbi->fix.line_length,
206 fbi->fix.smem_start +
207 (fbi->fix.line_length * fbi->var.yres),
211 printf("ipu_init_channel_buffer error %d\n", retval);
217 * Set framebuffer parameters and change the operating mode.
219 * @param info framebuffer information pointer
221 static int mxcfb_set_par(struct fb_info *fbi)
225 ipu_di_signal_cfg_t sig_cfg;
226 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
227 uint32_t out_pixel_fmt;
229 ipu_disable_channel(mxc_fbi->ipu_ch);
230 ipu_uninit_channel(mxc_fbi->ipu_ch);
233 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
234 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
235 if (fbi->fix.smem_start)
236 mxcfb_unmap_video_memory(fbi);
238 if (mxcfb_map_video_memory(fbi) < 0)
242 setup_disp_channel1(fbi);
244 memset(&sig_cfg, 0, sizeof(sig_cfg));
245 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
246 sig_cfg.interlaced = 1;
247 out_pixel_fmt = IPU_PIX_FMT_YUV444;
249 if (mxc_fbi->ipu_di_pix_fmt)
250 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
252 out_pixel_fmt = IPU_PIX_FMT_RGB666;
254 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
255 sig_cfg.odd_field_first = 1;
256 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
258 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
259 sig_cfg.Hsync_pol = 1;
260 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
261 sig_cfg.Vsync_pol = 1;
262 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
264 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
265 sig_cfg.data_pol = 1;
266 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
267 sig_cfg.enable_pol = 1;
268 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
269 sig_cfg.clkidle_en = 1;
271 debug("pixclock = %ul Hz\n",
272 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
274 if (ipu_init_sync_panel(mxc_fbi->ipu_di,
275 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
276 fbi->var.xres, fbi->var.yres,
278 fbi->var.left_margin,
280 fbi->var.right_margin,
281 fbi->var.upper_margin,
283 fbi->var.lower_margin,
285 puts("mxcfb: Error initializing panel.\n");
289 retval = setup_disp_channel2(fbi);
293 if (mxc_fbi->blank == FB_BLANK_UNBLANK)
294 ipu_enable_channel(mxc_fbi->ipu_ch);
300 * Check framebuffer variable parameters and adjust to valid values.
302 * @param var framebuffer variable parameters
304 * @param info framebuffer information pointer
306 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
311 if (var->xres_virtual < var->xres)
312 var->xres_virtual = var->xres;
313 if (var->yres_virtual < var->yres)
314 var->yres_virtual = var->yres;
316 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
317 (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
318 var->bits_per_pixel = default_bpp;
320 switch (var->bits_per_pixel) {
324 var->red.msb_right = 0;
326 var->green.length = 3;
327 var->green.offset = 2;
328 var->green.msb_right = 0;
330 var->blue.length = 2;
331 var->blue.offset = 0;
332 var->blue.msb_right = 0;
334 var->transp.length = 0;
335 var->transp.offset = 0;
336 var->transp.msb_right = 0;
340 var->red.offset = 11;
341 var->red.msb_right = 0;
343 var->green.length = 6;
344 var->green.offset = 5;
345 var->green.msb_right = 0;
347 var->blue.length = 5;
348 var->blue.offset = 0;
349 var->blue.msb_right = 0;
351 var->transp.length = 0;
352 var->transp.offset = 0;
353 var->transp.msb_right = 0;
357 var->red.offset = 16;
358 var->red.msb_right = 0;
360 var->green.length = 8;
361 var->green.offset = 8;
362 var->green.msb_right = 0;
364 var->blue.length = 8;
365 var->blue.offset = 0;
366 var->blue.msb_right = 0;
368 var->transp.length = 0;
369 var->transp.offset = 0;
370 var->transp.msb_right = 0;
374 var->red.offset = 16;
375 var->red.msb_right = 0;
377 var->green.length = 8;
378 var->green.offset = 8;
379 var->green.msb_right = 0;
381 var->blue.length = 8;
382 var->blue.offset = 0;
383 var->blue.msb_right = 0;
385 var->transp.length = 8;
386 var->transp.offset = 24;
387 var->transp.msb_right = 0;
391 if (var->pixclock < 1000) {
392 htotal = var->xres + var->right_margin + var->hsync_len +
394 vtotal = var->yres + var->lower_margin + var->vsync_len +
396 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
397 var->pixclock = KHZ2PICOS(var->pixclock);
398 printf("pixclock set for 60Hz refresh = %u ps\n",
409 static int mxcfb_map_video_memory(struct fb_info *fbi)
411 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
412 fbi->fix.smem_len = fbi->var.yres_virtual *
413 fbi->fix.line_length;
416 fbi->screen_base = (char *)malloc(fbi->fix.smem_len);
417 fbi->fix.smem_start = (unsigned long)fbi->screen_base;
418 if (fbi->screen_base == 0) {
419 puts("Unable to allocate framebuffer memory\n");
420 fbi->fix.smem_len = 0;
421 fbi->fix.smem_start = 0;
425 debug("allocated fb @ paddr=0x%08X, size=%d.\n",
426 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
428 fbi->screen_size = fbi->fix.smem_len;
430 /* Clear the screen */
431 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
436 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
438 fbi->screen_base = 0;
439 fbi->fix.smem_start = 0;
440 fbi->fix.smem_len = 0;
445 * Initializes the framebuffer information pointer. After allocating
446 * sufficient memory for the framebuffer structure, the fields are
447 * filled with custom information passed in from the configurable
448 * structures. This includes information such as bits per pixel,
449 * color maps, screen width/height and RGBA offsets.
451 * @return Framebuffer structure initialized with our information
453 static struct fb_info *mxcfb_init_fbinfo(void)
455 #define BYTES_PER_LONG 4
456 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
458 struct mxcfb_info *mxcfbi;
460 int size = sizeof(struct mxcfb_info) + PADDING +
461 sizeof(struct fb_info);
463 debug("%s: %d %d %d %d\n",
467 sizeof(struct mxcfb_info),
468 sizeof(struct fb_info));
470 * Allocate sufficient memory for the fb structure
479 fbi = (struct fb_info *)p;
480 fbi->par = p + sizeof(struct fb_info) + PADDING;
482 mxcfbi = (struct mxcfb_info *)fbi->par;
483 debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
484 (unsigned int)fbi, (unsigned int)mxcfbi);
486 fbi->var.activate = FB_ACTIVATE_NOW;
488 fbi->flags = FBINFO_FLAG_DEFAULT;
489 fbi->pseudo_palette = mxcfbi->pseudo_palette;
495 * Probe routine for the framebuffer driver. It is called during the
496 * driver binding process. The following functions are performed in
497 * this routine: Framebuffer initialization, Memory allocation and
498 * mapping, Framebuffer registration, IPU initialization.
500 * @return Appropriate error code to the kernel common code
502 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode)
505 struct mxcfb_info *mxcfbi;
509 * Initialize FB structures
511 fbi = mxcfb_init_fbinfo();
516 mxcfbi = (struct mxcfb_info *)fbi->par;
519 mxcfbi->ipu_ch = MEM_BG_SYNC;
520 mxcfbi->blank = FB_BLANK_UNBLANK;
522 mxcfbi->ipu_ch = MEM_DC_SYNC;
523 mxcfbi->blank = FB_BLANK_POWERDOWN;
528 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
529 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
530 strcpy(fbi->fix.id, "DISP3 BG");
534 mxcfb_info[mxcfbi->ipu_di] = fbi;
536 /* Need dummy values until real panel is configured */
538 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
539 fb_videomode_to_var(&fbi->var, mode);
540 fbi->var.bits_per_pixel = 16;
541 fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
542 fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
544 mxcfb_check_var(&fbi->var, fbi);
546 /* Default Y virtual size is 2x panel size */
547 fbi->var.yres_virtual = fbi->var.yres * 2;
551 /* alocate fb first */
552 if (mxcfb_map_video_memory(fbi) < 0)
557 panel.winSizeX = mode->xres;
558 panel.winSizeY = mode->yres;
559 panel.plnSizeX = mode->xres;
560 panel.plnSizeY = mode->yres;
562 panel.frameAdrs = (u32)fbi->screen_base;
563 panel.memSize = fbi->screen_size;
565 panel.gdfBytesPP = 2;
566 panel.gdfIndex = GDF_16BIT_565RGB;
568 ipu_dump_registers();
576 void *video_hw_init(void)
582 puts("Error initializing IPU\n");
584 ret = mxcfb_probe(IPU_PIX_FMT_RGB666, gmode);
585 debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
587 return (void *)&panel;
590 void video_set_lut(unsigned int index, /* color number */
591 unsigned char r, /* red */
592 unsigned char g, /* green */
593 unsigned char b /* blue */
599 int mx51_fb_init(struct fb_videomode *mode)