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+
16 #include <asm/errno.h>
17 #include <asm/global_data.h>
18 #include <linux/string.h>
19 #include <linux/list.h>
29 #include "videomodes.h"
31 DECLARE_GLOBAL_DATA_PTR;
33 static int mxcfb_map_video_memory(struct fb_info *fbi);
34 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
36 void lcd_initcolregs(void)
40 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
44 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
45 const struct fb_videomode *mode)
47 var->xres = mode->xres;
48 var->yres = mode->yres;
49 var->xres_virtual = mode->xres;
50 var->yres_virtual = mode->yres;
53 var->pixclock = mode->pixclock;
54 var->left_margin = mode->left_margin;
55 var->right_margin = mode->right_margin;
56 var->upper_margin = mode->upper_margin;
57 var->lower_margin = mode->lower_margin;
58 var->hsync_len = mode->hsync_len;
59 var->vsync_len = mode->vsync_len;
60 var->sync = mode->sync;
61 var->vmode = mode->vmode & FB_VMODE_MASK;
65 * Structure containing the MXC specific framebuffer information.
72 unsigned char overlay;
73 unsigned char alpha_chan_en;
74 dma_addr_t alpha_phy_addr0;
75 dma_addr_t alpha_phy_addr1;
76 void *alpha_virt_addr0;
77 void *alpha_virt_addr1;
78 uint32_t alpha_mem_len;
80 uint32_t cur_ipu_alpha_buf;
82 u32 pseudo_palette[16];
92 static unsigned long default_bpp = 16;
93 static unsigned char g_dp_in_use;
94 static struct fb_info *mxcfb_info[3];
95 static int ext_clk_used;
97 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
101 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
104 return fbi->var.nonstd;
106 switch (fbi->var.bits_per_pixel) {
108 pixfmt = IPU_PIX_FMT_BGR24;
111 pixfmt = IPU_PIX_FMT_BGR32;
114 pixfmt = IPU_PIX_FMT_RGB565;
117 pixfmt = IPU_PIX_FMT_GENERIC;
123 * Set fixed framebuffer parameters based on variable settings.
125 * @param info framebuffer information pointer
127 static int mxcfb_set_fix(struct fb_info *info)
129 struct fb_fix_screeninfo *fix = &info->fix;
130 struct fb_var_screeninfo *var = &info->var;
132 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
134 fix->type = FB_TYPE_PACKED_PIXELS;
135 fix->accel = FB_ACCEL_NONE;
136 fix->visual = FB_VISUAL_TRUECOLOR;
143 static int setup_disp_channel1(struct fb_info *fbi)
145 ipu_channel_params_t params;
146 struct mxcfb_info *mxc_fbi = fbi->par;
148 memset(¶ms, 0, sizeof(params));
149 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
151 debug("%s called\n", __func__);
153 * Assuming interlaced means yuv output, below setting also
154 * valid for mem_dc_sync. FG should have the same vmode as BG.
156 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
157 params.mem_dp_bg_sync.interlaced = 1;
158 params.mem_dp_bg_sync.out_pixel_fmt =
161 if (mxc_fbi->ipu_di_pix_fmt) {
162 params.mem_dp_bg_sync.out_pixel_fmt =
163 mxc_fbi->ipu_di_pix_fmt;
165 params.mem_dp_bg_sync.out_pixel_fmt =
169 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
170 if (mxc_fbi->alpha_chan_en)
171 params.mem_dp_bg_sync.alpha_chan_en = 1;
173 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms);
178 static int setup_disp_channel2(struct fb_info *fbi)
181 struct mxcfb_info *mxc_fbi = fbi->par;
183 mxc_fbi->cur_ipu_buf = 1;
184 if (mxc_fbi->alpha_chan_en)
185 mxc_fbi->cur_ipu_alpha_buf = 1;
187 fbi->var.xoffset = fbi->var.yoffset = 0;
189 debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
194 fbi->fix.line_length,
196 fbi->fix.smem_start +
197 (fbi->fix.line_length * fbi->var.yres) - 1);
199 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
201 fbi->var.xres, fbi->var.yres,
202 fbi->fix.line_length,
203 fbi->fix.smem_start +
204 (fbi->fix.line_length * fbi->var.yres),
208 printf("ipu_init_channel_buffer error %d\n", retval);
214 * Set framebuffer parameters and change the operating mode.
216 * @param info framebuffer information pointer
218 static int mxcfb_set_par(struct fb_info *fbi)
222 ipu_di_signal_cfg_t sig_cfg;
223 struct mxcfb_info *mxc_fbi = fbi->par;
224 uint32_t out_pixel_fmt;
226 ipu_disable_channel(mxc_fbi->ipu_ch);
227 ipu_uninit_channel(mxc_fbi->ipu_ch);
230 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
231 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
232 if (fbi->fix.smem_start)
233 mxcfb_unmap_video_memory(fbi);
235 if (mxcfb_map_video_memory(fbi) < 0)
239 setup_disp_channel1(fbi);
241 memset(&sig_cfg, 0, sizeof(sig_cfg));
242 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
243 sig_cfg.interlaced = 1;
244 out_pixel_fmt = IPU_PIX_FMT_YUV444;
246 if (mxc_fbi->ipu_di_pix_fmt)
247 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
249 out_pixel_fmt = IPU_PIX_FMT_RGB666;
251 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
252 sig_cfg.odd_field_first = 1;
253 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
255 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
256 sig_cfg.Hsync_pol = 1;
257 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
258 sig_cfg.Vsync_pol = 1;
259 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
261 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
262 sig_cfg.data_pol = 1;
263 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
264 sig_cfg.enable_pol = 1;
265 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
266 sig_cfg.clkidle_en = 1;
268 debug("pixclock = %lu.%03lu MHz\n",
269 PICOS2KHZ(fbi->var.pixclock) / 1000,
270 PICOS2KHZ(fbi->var.pixclock) % 1000);
272 retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
273 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
274 fbi->var.xres, fbi->var.yres,
276 fbi->var.left_margin,
278 fbi->var.right_margin,
279 fbi->var.upper_margin,
281 fbi->var.lower_margin,
284 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
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 != 24) &&
316 (var->bits_per_pixel != 16) && (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;
356 var->red.offset = 16;
357 var->red.msb_right = 0;
359 var->green.length = 8;
360 var->green.offset = 8;
361 var->green.msb_right = 0;
363 var->blue.length = 8;
364 var->blue.offset = 0;
365 var->blue.msb_right = 0;
367 var->transp.length = 0;
368 var->transp.offset = 0;
369 var->transp.msb_right = 0;
373 var->red.offset = 16;
374 var->red.msb_right = 0;
376 var->green.length = 8;
377 var->green.offset = 8;
378 var->green.msb_right = 0;
380 var->blue.length = 8;
381 var->blue.offset = 0;
382 var->blue.msb_right = 0;
384 var->transp.length = 8;
385 var->transp.offset = 24;
386 var->transp.msb_right = 0;
390 if (var->pixclock < 1000) {
391 htotal = var->xres + var->right_margin + var->hsync_len +
393 vtotal = var->yres + var->lower_margin + var->vsync_len +
395 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
396 var->pixclock = KHZ2PICOS(var->pixclock);
397 printf("pixclock set for 60Hz refresh = %u ps\n",
408 static int mxcfb_map_video_memory(struct fb_info *fbi)
410 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
411 fbi->fix.smem_len = fbi->var.yres_virtual *
412 fbi->fix.line_length;
415 fbi->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN);
417 fbi->screen_base = (void *)gd->fb_base;
419 fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
421 if (fbi->screen_base == NULL) {
422 puts("Unable to allocate framebuffer memory\n");
423 fbi->fix.smem_len = 0;
426 fbi->fix.smem_start = (unsigned long)fbi->screen_base;
428 debug("allocated fb @ paddr=0x%08X, size=%d.\n",
429 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
431 fbi->screen_size = fbi->fix.smem_len;
433 gd->fb_base = fbi->fix.smem_start;
438 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
440 fbi->screen_base = 0;
441 fbi->fix.smem_start = 0;
442 fbi->fix.smem_len = 0;
447 * Initializes the framebuffer information pointer. After allocating
448 * sufficient memory for the framebuffer structure, the fields are
449 * filled with custom information passed in from the configurable
450 * structures. This includes information such as bits per pixel,
451 * color maps, screen width/height and RGBA offsets.
453 * @return Framebuffer structure initialized with our information
455 static struct fb_info *mxcfb_init_fbinfo(void)
458 struct mxcfb_info *mxcfbi;
460 int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
461 sizeof(struct fb_info);
463 debug("%s: %d %d %d\n",
466 sizeof(struct mxcfb_info),
467 sizeof(struct fb_info));
469 * Allocate sufficient memory for the fb structure
479 fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
482 debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
485 fbi->var.activate = FB_ACTIVATE_NOW;
487 fbi->flags = FBINFO_FLAG_DEFAULT;
488 fbi->pseudo_palette = mxcfbi->pseudo_palette;
494 * Probe routine for the framebuffer driver. It is called during the
495 * driver binding process. The following functions are performed in
496 * this routine: Framebuffer initialization, Memory allocation and
497 * mapping, Framebuffer registration, IPU initialization.
499 * @return Appropriate error code to the kernel common code
501 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode, int di)
504 struct mxcfb_info *mxcfbi;
507 * Initialize FB structures
509 fbi = mxcfb_init_fbinfo();
516 mxcfbi->ipu_ch = MEM_BG_SYNC;
517 mxcfbi->blank = FB_BLANK_UNBLANK;
519 mxcfbi->ipu_ch = MEM_DC_SYNC;
520 mxcfbi->blank = FB_BLANK_POWERDOWN;
525 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
526 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
527 strcpy(fbi->fix.id, "DISP3 BG");
531 mxcfb_info[mxcfbi->ipu_di] = fbi;
533 /* Need dummy values until real panel is configured */
534 fbi->var.xres = panel_info.vl_col;
535 fbi->var.yres = panel_info.vl_row;
537 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
538 fb_videomode_to_var(&fbi->var, mode);
539 fbi->var.bits_per_pixel = NBITS(panel_info.vl_bpix);
540 fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
541 fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
543 mxcfb_check_var(&fbi->var, fbi);
545 /* Default Y virtual size is 2x panel size */
546 fbi->var.yres_virtual = fbi->var.yres * 2;
550 /* allocate fb first */
551 if (mxcfb_map_video_memory(fbi) < 0)
556 lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
558 debug("MXC IPUV3 configured\n"
559 "XRES = %d YRES = %d BitsXpixel = %d\n",
564 ipu_dump_registers();
569 ulong calc_fbsize(void)
571 return (panel_info.vl_col * panel_info.vl_row *
572 NBITS(panel_info.vl_bpix)) / 8;
575 void ipuv3_fb_shutdown(void)
578 struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
580 for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
581 struct fb_info *fbi = mxcfb_info[i];
583 struct mxcfb_info *mxc_fbi = fbi->par;
584 ipu_disable_channel(mxc_fbi->ipu_ch);
585 ipu_uninit_channel(mxc_fbi->ipu_ch);
588 clk_enable(g_ipu_clk);
589 for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
590 __raw_writel(__raw_readl(&stat->int_stat[i]),
593 clk_disable(g_ipu_clk);
596 int ipuv3_fb_init(struct fb_videomode *mode, int di, unsigned int interface_pix_fmt,
597 ipu_di_clk_parent_t di_clk_parent, unsigned long di_clk_val, int bpp)
603 ret = ipu_probe(di, di_clk_parent, di_clk_val);
605 printf("Error initializing IPU\n");
609 return mxcfb_probe(interface_pix_fmt, mode, di);