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 DECLARE_GLOBAL_DATA_PTR;
44 static int mxcfb_map_video_memory(struct fb_info *fbi);
45 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
48 static GraphicDevice panel;
49 static struct fb_videomode *gmode;
51 static uint32_t gpixfmt;
53 void fb_videomode_to_var(struct fb_var_screeninfo *var,
54 const struct fb_videomode *mode)
56 var->xres = mode->xres;
57 var->yres = mode->yres;
58 var->xres_virtual = mode->xres;
59 var->yres_virtual = mode->yres;
62 var->pixclock = mode->pixclock;
63 var->left_margin = mode->left_margin;
64 var->right_margin = mode->right_margin;
65 var->upper_margin = mode->upper_margin;
66 var->lower_margin = mode->lower_margin;
67 var->hsync_len = mode->hsync_len;
68 var->vsync_len = mode->vsync_len;
69 var->sync = mode->sync;
70 var->vmode = mode->vmode & FB_VMODE_MASK;
74 * Structure containing the MXC specific framebuffer information.
81 unsigned char overlay;
82 unsigned char alpha_chan_en;
83 dma_addr_t alpha_phy_addr0;
84 dma_addr_t alpha_phy_addr1;
85 void *alpha_virt_addr0;
86 void *alpha_virt_addr1;
87 uint32_t alpha_mem_len;
89 uint32_t cur_ipu_alpha_buf;
91 u32 pseudo_palette[16];
101 static unsigned long default_bpp = 16;
102 static unsigned char g_dp_in_use;
103 static struct fb_info *mxcfb_info[3];
104 static int ext_clk_used;
106 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
110 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
113 return fbi->var.nonstd;
115 switch (fbi->var.bits_per_pixel) {
117 pixfmt = IPU_PIX_FMT_BGR32;
120 pixfmt = IPU_PIX_FMT_RGB565;
127 * Set fixed framebuffer parameters based on variable settings.
129 * @param info framebuffer information pointer
131 static int mxcfb_set_fix(struct fb_info *info)
133 struct fb_fix_screeninfo *fix = &info->fix;
134 struct fb_var_screeninfo *var = &info->var;
136 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
138 fix->type = FB_TYPE_PACKED_PIXELS;
139 fix->accel = FB_ACCEL_NONE;
140 fix->visual = FB_VISUAL_TRUECOLOR;
147 static int setup_disp_channel1(struct fb_info *fbi)
149 ipu_channel_params_t params;
150 struct mxcfb_info *mxc_fbi = fbi->par;
152 memset(¶ms, 0, sizeof(params));
153 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
155 debug("%s called\n", __func__);
157 * Assuming interlaced means yuv output, below setting also
158 * valid for mem_dc_sync. FG should have the same vmode as BG.
160 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
161 params.mem_dp_bg_sync.interlaced = 1;
162 params.mem_dp_bg_sync.out_pixel_fmt =
165 if (mxc_fbi->ipu_di_pix_fmt) {
166 params.mem_dp_bg_sync.out_pixel_fmt =
167 mxc_fbi->ipu_di_pix_fmt;
169 params.mem_dp_bg_sync.out_pixel_fmt =
173 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
174 if (mxc_fbi->alpha_chan_en)
175 params.mem_dp_bg_sync.alpha_chan_en = 1;
177 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms);
182 static int setup_disp_channel2(struct fb_info *fbi)
185 struct mxcfb_info *mxc_fbi = fbi->par;
187 mxc_fbi->cur_ipu_buf = 1;
188 if (mxc_fbi->alpha_chan_en)
189 mxc_fbi->cur_ipu_alpha_buf = 1;
191 fbi->var.xoffset = fbi->var.yoffset = 0;
193 debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
198 fbi->fix.line_length,
200 fbi->fix.smem_start +
201 (fbi->fix.line_length * fbi->var.yres) - 1);
203 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
205 fbi->var.xres, fbi->var.yres,
206 fbi->fix.line_length,
207 fbi->fix.smem_start +
208 (fbi->fix.line_length * fbi->var.yres),
212 printf("ipu_init_channel_buffer error %d\n", retval);
218 * Set framebuffer parameters and change the operating mode.
220 * @param info framebuffer information pointer
222 static int mxcfb_set_par(struct fb_info *fbi)
226 ipu_di_signal_cfg_t sig_cfg;
227 struct mxcfb_info *mxc_fbi = fbi->par;
228 uint32_t out_pixel_fmt;
230 ipu_disable_channel(mxc_fbi->ipu_ch);
231 ipu_uninit_channel(mxc_fbi->ipu_ch);
234 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
235 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
236 if (fbi->fix.smem_start)
237 mxcfb_unmap_video_memory(fbi);
239 if (mxcfb_map_video_memory(fbi) < 0)
243 setup_disp_channel1(fbi);
245 memset(&sig_cfg, 0, sizeof(sig_cfg));
246 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
247 sig_cfg.interlaced = 1;
248 out_pixel_fmt = IPU_PIX_FMT_YUV444;
250 if (mxc_fbi->ipu_di_pix_fmt)
251 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
253 out_pixel_fmt = IPU_PIX_FMT_RGB666;
255 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
256 sig_cfg.odd_field_first = 1;
257 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
259 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
260 sig_cfg.Hsync_pol = 1;
261 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
262 sig_cfg.Vsync_pol = 1;
263 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
265 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
266 sig_cfg.data_pol = 1;
267 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
268 sig_cfg.enable_pol = 1;
269 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
270 sig_cfg.clkidle_en = 1;
272 debug("pixclock = %lu.%03lu MHz\n",
273 PICOS2KHZ(fbi->var.pixclock) / 1000,
274 PICOS2KHZ(fbi->var.pixclock) % 1000);
276 retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
277 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
278 fbi->var.xres, fbi->var.yres,
280 fbi->var.left_margin,
282 fbi->var.right_margin,
283 fbi->var.upper_margin,
285 fbi->var.lower_margin,
288 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
292 retval = setup_disp_channel2(fbi);
296 if (mxc_fbi->blank == FB_BLANK_UNBLANK)
297 ipu_enable_channel(mxc_fbi->ipu_ch);
303 * Check framebuffer variable parameters and adjust to valid values.
305 * @param var framebuffer variable parameters
307 * @param info framebuffer information pointer
309 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
314 if (var->xres_virtual < var->xres)
315 var->xres_virtual = var->xres;
316 if (var->yres_virtual < var->yres)
317 var->yres_virtual = var->yres;
319 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 16) &&
320 (var->bits_per_pixel != 8))
321 var->bits_per_pixel = default_bpp;
323 switch (var->bits_per_pixel) {
327 var->red.msb_right = 0;
329 var->green.length = 3;
330 var->green.offset = 2;
331 var->green.msb_right = 0;
333 var->blue.length = 2;
334 var->blue.offset = 0;
335 var->blue.msb_right = 0;
337 var->transp.length = 0;
338 var->transp.offset = 0;
339 var->transp.msb_right = 0;
343 var->red.offset = 11;
344 var->red.msb_right = 0;
346 var->green.length = 6;
347 var->green.offset = 5;
348 var->green.msb_right = 0;
350 var->blue.length = 5;
351 var->blue.offset = 0;
352 var->blue.msb_right = 0;
354 var->transp.length = 0;
355 var->transp.offset = 0;
356 var->transp.msb_right = 0;
361 var->red.offset = 16;
362 var->red.msb_right = 0;
364 var->green.length = 8;
365 var->green.offset = 8;
366 var->green.msb_right = 0;
368 var->blue.length = 8;
369 var->blue.offset = 0;
370 var->blue.msb_right = 0;
372 var->transp.length = 8;
373 var->transp.offset = 24;
374 var->transp.msb_right = 0;
378 if (var->pixclock < 1000) {
379 htotal = var->xres + var->right_margin + var->hsync_len +
381 vtotal = var->yres + var->lower_margin + var->vsync_len +
383 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
384 var->pixclock = KHZ2PICOS(var->pixclock);
385 printf("pixclock set for 60Hz refresh = %u ps\n",
396 static int mxcfb_map_video_memory(struct fb_info *fbi)
398 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
399 fbi->fix.smem_len = fbi->var.yres_virtual *
400 fbi->fix.line_length;
403 fbi->screen_base = (void *)gd->fb_base;
405 fbi->screen_base = malloc(fbi->fix.smem_len);
406 if (fbi->screen_base == 0) {
407 puts("Unable to allocate framebuffer memory\n");
408 fbi->fix.smem_len = 0;
411 fbi->fix.smem_start = (unsigned long)fbi->screen_base;
413 debug("allocated fb @ paddr=0x%08X, size=%d.\n",
414 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
416 fbi->screen_size = fbi->fix.smem_len;
418 /* Clear the screen */
419 memset(fbi->screen_base, 0, fbi->fix.smem_len);
424 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
426 fbi->screen_base = 0;
427 fbi->fix.smem_start = 0;
428 fbi->fix.smem_len = 0;
433 * Initializes the framebuffer information pointer. After allocating
434 * sufficient memory for the framebuffer structure, the fields are
435 * filled with custom information passed in from the configurable
436 * structures. This includes information such as bits per pixel,
437 * color maps, screen width/height and RGBA offsets.
439 * @return Framebuffer structure initialized with our information
441 static struct fb_info *mxcfb_init_fbinfo(void)
444 struct mxcfb_info *mxcfbi;
446 int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
447 sizeof(struct fb_info);
449 debug("%s: %d %d %d\n",
452 sizeof(struct mxcfb_info),
453 sizeof(struct fb_info));
455 * Allocate sufficient memory for the fb structure
465 fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
467 mxcfbi = (struct mxcfb_info *)fbi->par;
468 debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
471 fbi->var.activate = FB_ACTIVATE_NOW;
473 fbi->flags = FBINFO_FLAG_DEFAULT;
474 fbi->pseudo_palette = mxcfbi->pseudo_palette;
480 * Probe routine for the framebuffer driver. It is called during the
481 * driver binding process. The following functions are performed in
482 * this routine: Framebuffer initialization, Memory allocation and
483 * mapping, Framebuffer registration, IPU initialization.
485 * @return Appropriate error code to the kernel common code
487 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
488 struct fb_videomode *mode)
491 struct mxcfb_info *mxcfbi;
495 * Initialize FB structures
497 fbi = mxcfb_init_fbinfo();
502 mxcfbi = (struct mxcfb_info *)fbi->par;
505 mxcfbi->ipu_ch = MEM_BG_SYNC;
506 mxcfbi->blank = FB_BLANK_UNBLANK;
508 mxcfbi->ipu_ch = MEM_DC_SYNC;
509 mxcfbi->blank = FB_BLANK_POWERDOWN;
512 mxcfbi->ipu_di = disp;
514 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
515 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
516 strcpy(fbi->fix.id, "DISP3 BG");
520 mxcfb_info[mxcfbi->ipu_di] = fbi;
522 /* Need dummy values until real panel is configured */
524 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
525 fb_videomode_to_var(&fbi->var, mode);
526 fbi->var.bits_per_pixel = default_bpp;
527 fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
528 fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
530 mxcfb_check_var(&fbi->var, fbi);
532 /* Default Y virtual size is 2x panel size */
533 fbi->var.yres_virtual = fbi->var.yres * 2;
537 /* alocate fb first */
538 if (mxcfb_map_video_memory(fbi) < 0)
543 panel.winSizeX = mode->xres;
544 panel.winSizeY = mode->yres;
545 panel.plnSizeX = mode->xres;
546 panel.plnSizeY = mode->yres;
548 panel.frameAdrs = (u32)fbi->screen_base;
549 panel.memSize = fbi->screen_size;
551 switch (fbi->var.bits_per_pixel) {
553 panel.gdfBytesPP = 1;
554 panel.gdfIndex = GDF__8BIT_INDEX;
558 panel.gdfBytesPP = 2;
559 panel.gdfIndex = GDF_16BIT_565RGB;
563 panel.gdfBytesPP = 4;
564 panel.gdfIndex = GDF_32BIT_X888RGB;
571 ipu_dump_registers();
579 void *video_hw_init(void)
585 puts("Error initializing IPU\n");
587 ret = mxcfb_probe(gpixfmt, gdisp, gmode);
588 debug("Framebuffer at 0x%08x\n", panel.frameAdrs);
593 void video_set_lut(unsigned int index, /* color number */
594 unsigned char r, /* red */
595 unsigned char g, /* green */
596 unsigned char b /* blue */
602 int mx5_fb_init(struct fb_videomode *mode, uint8_t disp, uint32_t pixfmt, int bpp)