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 static struct fb_videomode *gmode;
49 static uint32_t gpixfmt;
51 void fb_videomode_to_var(struct fb_var_screeninfo *var,
52 const struct fb_videomode *mode)
54 var->xres = mode->xres;
55 var->yres = mode->yres;
56 var->xres_virtual = mode->xres;
57 var->yres_virtual = mode->yres;
60 var->pixclock = mode->pixclock;
61 var->left_margin = mode->left_margin;
62 var->right_margin = mode->right_margin;
63 var->upper_margin = mode->upper_margin;
64 var->lower_margin = mode->lower_margin;
65 var->hsync_len = mode->hsync_len;
66 var->vsync_len = mode->vsync_len;
67 var->sync = mode->sync;
68 var->vmode = mode->vmode & FB_VMODE_MASK;
72 * Structure containing the MXC specific framebuffer information.
79 unsigned char overlay;
80 unsigned char alpha_chan_en;
81 dma_addr_t alpha_phy_addr0;
82 dma_addr_t alpha_phy_addr1;
83 void *alpha_virt_addr0;
84 void *alpha_virt_addr1;
85 uint32_t alpha_mem_len;
87 uint32_t cur_ipu_alpha_buf;
89 u32 pseudo_palette[16];
99 static unsigned long default_bpp = 16;
100 static unsigned char g_dp_in_use;
101 static struct fb_info *mxcfb_info[3];
102 static int ext_clk_used;
104 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
108 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
111 return fbi->var.nonstd;
113 switch (fbi->var.bits_per_pixel) {
115 pixfmt = IPU_PIX_FMT_BGR32;
118 pixfmt = IPU_PIX_FMT_RGB565;
125 * Set fixed framebuffer parameters based on variable settings.
127 * @param info framebuffer information pointer
129 static int mxcfb_set_fix(struct fb_info *info)
131 struct fb_fix_screeninfo *fix = &info->fix;
132 struct fb_var_screeninfo *var = &info->var;
134 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
136 fix->type = FB_TYPE_PACKED_PIXELS;
137 fix->accel = FB_ACCEL_NONE;
138 fix->visual = FB_VISUAL_TRUECOLOR;
145 static int setup_disp_channel1(struct fb_info *fbi)
147 ipu_channel_params_t params;
148 struct mxcfb_info *mxc_fbi = fbi->par;
150 memset(¶ms, 0, sizeof(params));
151 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
153 debug("%s called\n", __func__);
155 * Assuming interlaced means yuv output, below setting also
156 * valid for mem_dc_sync. FG should have the same vmode as BG.
158 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
159 params.mem_dp_bg_sync.interlaced = 1;
160 params.mem_dp_bg_sync.out_pixel_fmt =
163 if (mxc_fbi->ipu_di_pix_fmt) {
164 params.mem_dp_bg_sync.out_pixel_fmt =
165 mxc_fbi->ipu_di_pix_fmt;
167 params.mem_dp_bg_sync.out_pixel_fmt =
171 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
172 if (mxc_fbi->alpha_chan_en)
173 params.mem_dp_bg_sync.alpha_chan_en = 1;
175 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms);
180 static int setup_disp_channel2(struct fb_info *fbi)
183 struct mxcfb_info *mxc_fbi = fbi->par;
185 mxc_fbi->cur_ipu_buf = 1;
186 if (mxc_fbi->alpha_chan_en)
187 mxc_fbi->cur_ipu_alpha_buf = 1;
189 fbi->var.xoffset = fbi->var.yoffset = 0;
191 debug("%s: %x %d %d %d %lx %lx\n",
196 fbi->fix.line_length,
198 fbi->fix.smem_start +
199 (fbi->fix.line_length * fbi->var.yres));
201 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
203 fbi->var.xres, fbi->var.yres,
204 fbi->fix.line_length,
205 fbi->fix.smem_start +
206 (fbi->fix.line_length * fbi->var.yres),
210 printf("ipu_init_channel_buffer error %d\n", retval);
216 * Set framebuffer parameters and change the operating mode.
218 * @param info framebuffer information pointer
220 static int mxcfb_set_par(struct fb_info *fbi)
224 ipu_di_signal_cfg_t sig_cfg;
225 struct mxcfb_info *mxc_fbi = fbi->par;
226 uint32_t out_pixel_fmt;
228 ipu_disable_channel(mxc_fbi->ipu_ch);
229 ipu_uninit_channel(mxc_fbi->ipu_ch);
232 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
233 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
234 if (fbi->fix.smem_start)
235 mxcfb_unmap_video_memory(fbi);
237 if (mxcfb_map_video_memory(fbi) < 0)
241 setup_disp_channel1(fbi);
243 memset(&sig_cfg, 0, sizeof(sig_cfg));
244 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
245 sig_cfg.interlaced = 1;
246 out_pixel_fmt = IPU_PIX_FMT_YUV444;
248 if (mxc_fbi->ipu_di_pix_fmt)
249 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
251 out_pixel_fmt = IPU_PIX_FMT_RGB666;
253 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
254 sig_cfg.odd_field_first = 1;
255 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
257 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
258 sig_cfg.Hsync_pol = 1;
259 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
260 sig_cfg.Vsync_pol = 1;
261 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
263 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
264 sig_cfg.data_pol = 1;
265 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
266 sig_cfg.enable_pol = 1;
267 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
268 sig_cfg.clkidle_en = 1;
270 debug("pixclock = %ul Hz\n",
271 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
273 if (ipu_init_sync_panel(mxc_fbi->ipu_di,
274 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
275 fbi->var.xres, fbi->var.yres,
277 fbi->var.left_margin,
279 fbi->var.right_margin,
280 fbi->var.upper_margin,
282 fbi->var.lower_margin,
284 puts("mxcfb: Error initializing panel.\n");
288 retval = setup_disp_channel2(fbi);
292 if (mxc_fbi->blank == FB_BLANK_UNBLANK)
293 ipu_enable_channel(mxc_fbi->ipu_ch);
299 * Check framebuffer variable parameters and adjust to valid values.
301 * @param var framebuffer variable parameters
303 * @param info framebuffer information pointer
305 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
310 if (var->xres_virtual < var->xres)
311 var->xres_virtual = var->xres;
312 if (var->yres_virtual < var->yres)
313 var->yres_virtual = var->yres;
315 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 16) &&
316 (var->bits_per_pixel != 8))
317 var->bits_per_pixel = default_bpp;
319 switch (var->bits_per_pixel) {
323 var->red.msb_right = 0;
325 var->green.length = 3;
326 var->green.offset = 2;
327 var->green.msb_right = 0;
329 var->blue.length = 2;
330 var->blue.offset = 0;
331 var->blue.msb_right = 0;
333 var->transp.length = 0;
334 var->transp.offset = 0;
335 var->transp.msb_right = 0;
339 var->red.offset = 11;
340 var->red.msb_right = 0;
342 var->green.length = 6;
343 var->green.offset = 5;
344 var->green.msb_right = 0;
346 var->blue.length = 5;
347 var->blue.offset = 0;
348 var->blue.msb_right = 0;
350 var->transp.length = 0;
351 var->transp.offset = 0;
352 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 = 8;
369 var->transp.offset = 24;
370 var->transp.msb_right = 0;
374 if (var->pixclock < 1000) {
375 htotal = var->xres + var->right_margin + var->hsync_len +
377 vtotal = var->yres + var->lower_margin + var->vsync_len +
379 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
380 var->pixclock = KHZ2PICOS(var->pixclock);
381 printf("pixclock set for 60Hz refresh = %u ps\n",
392 static int mxcfb_map_video_memory(struct fb_info *fbi)
394 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
395 fbi->fix.smem_len = fbi->var.yres_virtual *
396 fbi->fix.line_length;
399 fbi->screen_base = (char *)malloc(fbi->fix.smem_len);
400 fbi->fix.smem_start = (unsigned long)fbi->screen_base;
401 if (fbi->screen_base == 0) {
402 puts("Unable to allocate framebuffer memory\n");
403 fbi->fix.smem_len = 0;
404 fbi->fix.smem_start = 0;
408 debug("allocated fb @ paddr=0x%08X, size=%d.\n",
409 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
411 fbi->screen_size = fbi->fix.smem_len;
413 /* Clear the screen */
414 memset(fbi->screen_base, 0, fbi->fix.smem_len);
419 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
421 fbi->screen_base = 0;
422 fbi->fix.smem_start = 0;
423 fbi->fix.smem_len = 0;
428 * Initializes the framebuffer information pointer. After allocating
429 * sufficient memory for the framebuffer structure, the fields are
430 * filled with custom information passed in from the configurable
431 * structures. This includes information such as bits per pixel,
432 * color maps, screen width/height and RGBA offsets.
434 * @return Framebuffer structure initialized with our information
436 static struct fb_info *mxcfb_init_fbinfo(void)
439 struct mxcfb_info *mxcfbi;
441 int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
442 sizeof(struct fb_info);
444 debug("%s: %d %d %d\n",
447 sizeof(struct mxcfb_info),
448 sizeof(struct fb_info));
450 * Allocate sufficient memory for the fb structure
460 fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
462 mxcfbi = (struct mxcfb_info *)fbi->par;
463 debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
466 fbi->var.activate = FB_ACTIVATE_NOW;
468 fbi->flags = FBINFO_FLAG_DEFAULT;
469 fbi->pseudo_palette = mxcfbi->pseudo_palette;
475 * Probe routine for the framebuffer driver. It is called during the
476 * driver binding process. The following functions are performed in
477 * this routine: Framebuffer initialization, Memory allocation and
478 * mapping, Framebuffer registration, IPU initialization.
480 * @return Appropriate error code to the kernel common code
482 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
483 struct fb_videomode *mode)
486 struct mxcfb_info *mxcfbi;
490 * Initialize FB structures
492 fbi = mxcfb_init_fbinfo();
497 mxcfbi = (struct mxcfb_info *)fbi->par;
500 mxcfbi->ipu_ch = MEM_BG_SYNC;
501 mxcfbi->blank = FB_BLANK_UNBLANK;
503 mxcfbi->ipu_ch = MEM_DC_SYNC;
504 mxcfbi->blank = FB_BLANK_POWERDOWN;
507 mxcfbi->ipu_di = disp;
509 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
510 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
511 strcpy(fbi->fix.id, "DISP3 BG");
515 mxcfb_info[mxcfbi->ipu_di] = fbi;
517 /* Need dummy values until real panel is configured */
519 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
520 fb_videomode_to_var(&fbi->var, mode);
521 fbi->var.bits_per_pixel = default_bpp;
522 fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
523 fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
525 mxcfb_check_var(&fbi->var, fbi);
527 /* Default Y virtual size is 2x panel size */
528 fbi->var.yres_virtual = fbi->var.yres * 2;
532 /* alocate fb first */
533 if (mxcfb_map_video_memory(fbi) < 0)
538 panel.winSizeX = mode->xres;
539 panel.winSizeY = mode->yres;
540 panel.plnSizeX = mode->xres;
541 panel.plnSizeY = mode->yres;
543 panel.frameAdrs = (u32)fbi->screen_base;
544 panel.memSize = fbi->screen_size;
546 switch (fbi->var.bits_per_pixel) {
548 panel.gdfBytesPP = 1;
549 panel.gdfIndex = GDF__8BIT_INDEX;
553 panel.gdfBytesPP = 2;
554 panel.gdfIndex = GDF_16BIT_565RGB;
558 panel.gdfBytesPP = 4;
559 panel.gdfIndex = GDF_32BIT_X888RGB;
566 ipu_dump_registers();
574 void *video_hw_init(void)
580 puts("Error initializing IPU\n");
582 ret = mxcfb_probe(gpixfmt, gdisp, gmode);
583 debug("Framebuffer at 0x%08x\n", panel.frameAdrs);
588 void video_set_lut(unsigned int index, /* color number */
589 unsigned char r, /* red */
590 unsigned char g, /* green */
591 unsigned char b /* blue */
597 int mx5_fb_init(struct fb_videomode *mode, uint8_t disp, uint32_t pixfmt, int bpp)