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 <linux/string.h>
18 #include <linux/list.h>
26 #include "videomodes.h"
28 DECLARE_GLOBAL_DATA_PTR;
30 static int mxcfb_map_video_memory(struct fb_info *fbi);
31 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
33 void lcd_initcolregs(void)
37 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
41 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
42 const struct fb_videomode *mode)
44 var->xres = mode->xres;
45 var->yres = mode->yres;
46 var->xres_virtual = mode->xres;
47 var->yres_virtual = mode->yres;
50 var->pixclock = mode->pixclock;
51 var->left_margin = mode->left_margin;
52 var->right_margin = mode->right_margin;
53 var->upper_margin = mode->upper_margin;
54 var->lower_margin = mode->lower_margin;
55 var->hsync_len = mode->hsync_len;
56 var->vsync_len = mode->vsync_len;
57 var->sync = mode->sync;
58 var->vmode = mode->vmode & FB_VMODE_MASK;
62 * Structure containing the MXC specific framebuffer information.
69 unsigned char overlay;
70 unsigned char alpha_chan_en;
71 dma_addr_t alpha_phy_addr0;
72 dma_addr_t alpha_phy_addr1;
73 void *alpha_virt_addr0;
74 void *alpha_virt_addr1;
75 uint32_t alpha_mem_len;
77 uint32_t cur_ipu_alpha_buf;
79 u32 pseudo_palette[16];
89 static unsigned long default_bpp = 16;
90 static unsigned char g_dp_in_use;
91 static struct fb_info *mxcfb_info[3];
92 static int ext_clk_used;
94 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
98 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
101 return fbi->var.nonstd;
103 switch (fbi->var.bits_per_pixel) {
105 pixfmt = IPU_PIX_FMT_BGR24;
108 pixfmt = IPU_PIX_FMT_BGR32;
111 pixfmt = IPU_PIX_FMT_RGB565;
114 pixfmt = IPU_PIX_FMT_GENERIC;
120 * Set fixed framebuffer parameters based on variable settings.
122 * @param info framebuffer information pointer
124 static int mxcfb_set_fix(struct fb_info *info)
126 struct fb_fix_screeninfo *fix = &info->fix;
127 struct fb_var_screeninfo *var = &info->var;
129 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
131 fix->type = FB_TYPE_PACKED_PIXELS;
132 fix->accel = FB_ACCEL_NONE;
133 fix->visual = FB_VISUAL_TRUECOLOR;
140 static int setup_disp_channel1(struct fb_info *fbi)
142 ipu_channel_params_t params;
143 struct mxcfb_info *mxc_fbi = fbi->par;
145 memset(¶ms, 0, sizeof(params));
146 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
148 debug("%s called\n", __func__);
150 * Assuming interlaced means yuv output, below setting also
151 * valid for mem_dc_sync. FG should have the same vmode as BG.
153 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
154 params.mem_dp_bg_sync.interlaced = 1;
155 params.mem_dp_bg_sync.out_pixel_fmt =
158 if (mxc_fbi->ipu_di_pix_fmt) {
159 params.mem_dp_bg_sync.out_pixel_fmt =
160 mxc_fbi->ipu_di_pix_fmt;
162 params.mem_dp_bg_sync.out_pixel_fmt =
166 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
167 if (mxc_fbi->alpha_chan_en)
168 params.mem_dp_bg_sync.alpha_chan_en = 1;
170 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms);
175 static int setup_disp_channel2(struct fb_info *fbi)
178 struct mxcfb_info *mxc_fbi = fbi->par;
180 mxc_fbi->cur_ipu_buf = 1;
181 if (mxc_fbi->alpha_chan_en)
182 mxc_fbi->cur_ipu_alpha_buf = 1;
184 fbi->var.xoffset = fbi->var.yoffset = 0;
186 debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
191 fbi->fix.line_length,
193 fbi->fix.smem_start +
194 (fbi->fix.line_length * fbi->var.yres) - 1);
196 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
198 fbi->var.xres, fbi->var.yres,
199 fbi->fix.line_length,
200 fbi->fix.smem_start +
201 (fbi->fix.line_length * fbi->var.yres),
205 printf("ipu_init_channel_buffer error %d\n", retval);
211 * Set framebuffer parameters and change the operating mode.
213 * @param info framebuffer information pointer
215 static int mxcfb_set_par(struct fb_info *fbi)
219 ipu_di_signal_cfg_t sig_cfg;
220 struct mxcfb_info *mxc_fbi = fbi->par;
221 uint32_t out_pixel_fmt;
223 ipu_disable_channel(mxc_fbi->ipu_ch);
224 ipu_uninit_channel(mxc_fbi->ipu_ch);
227 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
228 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
229 if (fbi->fix.smem_start)
230 mxcfb_unmap_video_memory(fbi);
232 if (mxcfb_map_video_memory(fbi) < 0)
236 setup_disp_channel1(fbi);
238 memset(&sig_cfg, 0, sizeof(sig_cfg));
239 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
240 sig_cfg.interlaced = 1;
241 out_pixel_fmt = IPU_PIX_FMT_YUV444;
243 if (mxc_fbi->ipu_di_pix_fmt)
244 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
246 out_pixel_fmt = IPU_PIX_FMT_RGB666;
248 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
249 sig_cfg.odd_field_first = 1;
250 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
252 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
253 sig_cfg.Hsync_pol = 1;
254 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
255 sig_cfg.Vsync_pol = 1;
256 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
258 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
259 sig_cfg.data_pol = 1;
260 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
261 sig_cfg.enable_pol = 1;
262 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
263 sig_cfg.clkidle_en = 1;
265 debug("pixclock = %lu.%03lu MHz\n",
266 PICOS2KHZ(fbi->var.pixclock) / 1000,
267 PICOS2KHZ(fbi->var.pixclock) % 1000);
269 retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
270 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
271 fbi->var.xres, fbi->var.yres,
273 fbi->var.left_margin,
275 fbi->var.right_margin,
276 fbi->var.upper_margin,
278 fbi->var.lower_margin,
281 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
285 retval = setup_disp_channel2(fbi);
289 if (mxc_fbi->blank == FB_BLANK_UNBLANK)
290 ipu_enable_channel(mxc_fbi->ipu_ch);
296 * Check framebuffer variable parameters and adjust to valid values.
298 * @param var framebuffer variable parameters
300 * @param info framebuffer information pointer
302 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
307 if (var->xres_virtual < var->xres)
308 var->xres_virtual = var->xres;
309 if (var->yres_virtual < var->yres)
310 var->yres_virtual = var->yres;
312 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
313 (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
314 var->bits_per_pixel = default_bpp;
316 switch (var->bits_per_pixel) {
320 var->red.msb_right = 0;
322 var->green.length = 3;
323 var->green.offset = 2;
324 var->green.msb_right = 0;
326 var->blue.length = 2;
327 var->blue.offset = 0;
328 var->blue.msb_right = 0;
330 var->transp.length = 0;
331 var->transp.offset = 0;
332 var->transp.msb_right = 0;
336 var->red.offset = 11;
337 var->red.msb_right = 0;
339 var->green.length = 6;
340 var->green.offset = 5;
341 var->green.msb_right = 0;
343 var->blue.length = 5;
344 var->blue.offset = 0;
345 var->blue.msb_right = 0;
347 var->transp.length = 0;
348 var->transp.offset = 0;
349 var->transp.msb_right = 0;
353 var->red.offset = 16;
354 var->red.msb_right = 0;
356 var->green.length = 8;
357 var->green.offset = 8;
358 var->green.msb_right = 0;
360 var->blue.length = 8;
361 var->blue.offset = 0;
362 var->blue.msb_right = 0;
364 var->transp.length = 0;
365 var->transp.offset = 0;
366 var->transp.msb_right = 0;
370 var->red.offset = 16;
371 var->red.msb_right = 0;
373 var->green.length = 8;
374 var->green.offset = 8;
375 var->green.msb_right = 0;
377 var->blue.length = 8;
378 var->blue.offset = 0;
379 var->blue.msb_right = 0;
381 var->transp.length = 8;
382 var->transp.offset = 24;
383 var->transp.msb_right = 0;
387 if (var->pixclock < 1000) {
388 htotal = var->xres + var->right_margin + var->hsync_len +
390 vtotal = var->yres + var->lower_margin + var->vsync_len +
392 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
393 var->pixclock = KHZ2PICOS(var->pixclock);
394 printf("pixclock set for 60Hz refresh = %u ps\n",
405 static int mxcfb_map_video_memory(struct fb_info *fbi)
407 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
408 fbi->fix.smem_len = fbi->var.yres_virtual *
409 fbi->fix.line_length;
412 fbi->screen_base = (void *)gd->fb_base;
414 fbi->screen_base = malloc(fbi->fix.smem_len);
415 if (fbi->screen_base == NULL) {
416 puts("Unable to allocate framebuffer memory\n");
417 fbi->fix.smem_len = 0;
420 fbi->fix.smem_start = (unsigned long)fbi->screen_base;
422 debug("allocated fb @ paddr=0x%08X, size=%d.\n",
423 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
425 fbi->screen_size = fbi->fix.smem_len;
430 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
432 fbi->screen_base = 0;
433 fbi->fix.smem_start = 0;
434 fbi->fix.smem_len = 0;
439 * Initializes the framebuffer information pointer. After allocating
440 * sufficient memory for the framebuffer structure, the fields are
441 * filled with custom information passed in from the configurable
442 * structures. This includes information such as bits per pixel,
443 * color maps, screen width/height and RGBA offsets.
445 * @return Framebuffer structure initialized with our information
447 static struct fb_info *mxcfb_init_fbinfo(void)
450 struct mxcfb_info *mxcfbi;
452 int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
453 sizeof(struct fb_info);
455 debug("%s: %d %d %d\n",
458 sizeof(struct mxcfb_info),
459 sizeof(struct fb_info));
461 * Allocate sufficient memory for the fb structure
471 fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
474 debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
477 fbi->var.activate = FB_ACTIVATE_NOW;
479 fbi->flags = FBINFO_FLAG_DEFAULT;
480 fbi->pseudo_palette = mxcfbi->pseudo_palette;
486 * Probe routine for the framebuffer driver. It is called during the
487 * driver binding process. The following functions are performed in
488 * this routine: Framebuffer initialization, Memory allocation and
489 * mapping, Framebuffer registration, IPU initialization.
491 * @return Appropriate error code to the kernel common code
493 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode, int di)
496 struct mxcfb_info *mxcfbi;
499 * Initialize FB structures
501 fbi = mxcfb_init_fbinfo();
508 mxcfbi->ipu_ch = MEM_BG_SYNC;
509 mxcfbi->blank = FB_BLANK_UNBLANK;
511 mxcfbi->ipu_ch = MEM_DC_SYNC;
512 mxcfbi->blank = FB_BLANK_POWERDOWN;
517 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
518 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
519 strcpy(fbi->fix.id, "DISP3 BG");
523 mxcfb_info[mxcfbi->ipu_di] = fbi;
525 /* Need dummy values until real panel is configured */
526 fbi->var.xres = panel_info.vl_col;
527 fbi->var.yres = panel_info.vl_row;
529 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
530 fb_videomode_to_var(&fbi->var, mode);
531 fbi->var.bits_per_pixel = NBITS(panel_info.vl_bpix);
532 fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
533 fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
535 mxcfb_check_var(&fbi->var, fbi);
537 /* Default Y virtual size is 2x panel size */
538 fbi->var.yres_virtual = fbi->var.yres * 2;
542 /* allocate fb first */
543 if (mxcfb_map_video_memory(fbi) < 0)
548 lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
550 debug("MXC IPUV3 configured\n"
551 "XRES = %d YRES = %d BitsXpixel = %d\n",
556 ipu_dump_registers();
561 ulong calc_fbsize(void)
563 return (panel_info.vl_col * panel_info.vl_row *
564 NBITS(panel_info.vl_bpix)) / 8;
567 int ipuv3_fb_init(struct fb_videomode *mode, int di, unsigned int interface_pix_fmt,
568 ipu_di_clk_parent_t di_clk_parent, unsigned long di_clk_val, int bpp)
574 ret = ipu_probe(di, di_clk_parent, di_clk_val);
576 printf("Error initializing IPU\n");
580 return mxcfb_probe(interface_pix_fmt, mode, di);