5 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
7 * MX51 Linux framebuffer:
9 * (C) Copyright 2004-2010 Freescale Semiconductor, Inc.
11 * SPDX-License-Identifier: GPL-2.0+
15 #include <linux/errno.h>
16 #include <asm/global_data.h>
17 #include <linux/string.h>
18 #include <linux/list.h>
23 #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
);
34 static GraphicDevice panel
;
35 static struct fb_videomode
const *gmode
;
37 static uint32_t gpixfmt
;
39 static void fb_videomode_to_var(struct fb_var_screeninfo
*var
,
40 const struct fb_videomode
*mode
)
42 var
->xres
= mode
->xres
;
43 var
->yres
= mode
->yres
;
44 var
->xres_virtual
= mode
->xres
;
45 var
->yres_virtual
= mode
->yres
;
48 var
->pixclock
= mode
->pixclock
;
49 var
->left_margin
= mode
->left_margin
;
50 var
->right_margin
= mode
->right_margin
;
51 var
->upper_margin
= mode
->upper_margin
;
52 var
->lower_margin
= mode
->lower_margin
;
53 var
->hsync_len
= mode
->hsync_len
;
54 var
->vsync_len
= mode
->vsync_len
;
55 var
->sync
= mode
->sync
;
56 var
->vmode
= mode
->vmode
& FB_VMODE_MASK
;
60 * Structure containing the MXC specific framebuffer information.
67 unsigned char overlay
;
68 unsigned char alpha_chan_en
;
69 dma_addr_t alpha_phy_addr0
;
70 dma_addr_t alpha_phy_addr1
;
71 void *alpha_virt_addr0
;
72 void *alpha_virt_addr1
;
73 uint32_t alpha_mem_len
;
75 uint32_t cur_ipu_alpha_buf
;
77 u32 pseudo_palette
[16];
87 static unsigned long default_bpp
= 16;
88 static unsigned char g_dp_in_use
;
89 static struct fb_info
*mxcfb_info
[3];
90 static int ext_clk_used
;
92 static uint32_t bpp_to_pixfmt(struct fb_info
*fbi
)
96 debug("bpp_to_pixfmt: %d\n", fbi
->var
.bits_per_pixel
);
99 return fbi
->var
.nonstd
;
101 switch (fbi
->var
.bits_per_pixel
) {
103 pixfmt
= IPU_PIX_FMT_BGR24
;
106 pixfmt
= IPU_PIX_FMT_BGR32
;
109 pixfmt
= IPU_PIX_FMT_RGB565
;
116 * Set fixed framebuffer parameters based on variable settings.
118 * @param info framebuffer information pointer
120 static int mxcfb_set_fix(struct fb_info
*info
)
122 struct fb_fix_screeninfo
*fix
= &info
->fix
;
123 struct fb_var_screeninfo
*var
= &info
->var
;
125 fix
->line_length
= var
->xres_virtual
* var
->bits_per_pixel
/ 8;
127 fix
->type
= FB_TYPE_PACKED_PIXELS
;
128 fix
->accel
= FB_ACCEL_NONE
;
129 fix
->visual
= FB_VISUAL_TRUECOLOR
;
136 static int setup_disp_channel1(struct fb_info
*fbi
)
138 ipu_channel_params_t params
;
139 struct mxcfb_info
*mxc_fbi
= (struct mxcfb_info
*)fbi
->par
;
141 memset(¶ms
, 0, sizeof(params
));
142 params
.mem_dp_bg_sync
.di
= mxc_fbi
->ipu_di
;
144 debug("%s called\n", __func__
);
146 * Assuming interlaced means yuv output, below setting also
147 * valid for mem_dc_sync. FG should have the same vmode as BG.
149 if (fbi
->var
.vmode
& FB_VMODE_INTERLACED
) {
150 params
.mem_dp_bg_sync
.interlaced
= 1;
151 params
.mem_dp_bg_sync
.out_pixel_fmt
=
154 if (mxc_fbi
->ipu_di_pix_fmt
) {
155 params
.mem_dp_bg_sync
.out_pixel_fmt
=
156 mxc_fbi
->ipu_di_pix_fmt
;
158 params
.mem_dp_bg_sync
.out_pixel_fmt
=
162 params
.mem_dp_bg_sync
.in_pixel_fmt
= bpp_to_pixfmt(fbi
);
163 if (mxc_fbi
->alpha_chan_en
)
164 params
.mem_dp_bg_sync
.alpha_chan_en
= 1;
166 ipu_init_channel(mxc_fbi
->ipu_ch
, ¶ms
);
171 static int setup_disp_channel2(struct fb_info
*fbi
)
174 struct mxcfb_info
*mxc_fbi
= (struct mxcfb_info
*)fbi
->par
;
176 mxc_fbi
->cur_ipu_buf
= 1;
177 if (mxc_fbi
->alpha_chan_en
)
178 mxc_fbi
->cur_ipu_alpha_buf
= 1;
180 fbi
->var
.xoffset
= fbi
->var
.yoffset
= 0;
182 debug("%s: %x %d %d %d %lx %lx\n",
187 fbi
->fix
.line_length
,
189 fbi
->fix
.smem_start
+
190 (fbi
->fix
.line_length
* fbi
->var
.yres
));
192 retval
= ipu_init_channel_buffer(mxc_fbi
->ipu_ch
, IPU_INPUT_BUFFER
,
194 fbi
->var
.xres
, fbi
->var
.yres
,
195 fbi
->fix
.line_length
,
196 fbi
->fix
.smem_start
+
197 (fbi
->fix
.line_length
* fbi
->var
.yres
),
201 printf("ipu_init_channel_buffer error %d\n", retval
);
207 * Set framebuffer parameters and change the operating mode.
209 * @param info framebuffer information pointer
211 static int mxcfb_set_par(struct fb_info
*fbi
)
215 ipu_di_signal_cfg_t sig_cfg
;
216 struct mxcfb_info
*mxc_fbi
= (struct mxcfb_info
*)fbi
->par
;
217 uint32_t out_pixel_fmt
;
219 ipu_disable_channel(mxc_fbi
->ipu_ch
);
220 ipu_uninit_channel(mxc_fbi
->ipu_ch
);
223 mem_len
= fbi
->var
.yres_virtual
* fbi
->fix
.line_length
;
224 if (!fbi
->fix
.smem_start
|| (mem_len
> fbi
->fix
.smem_len
)) {
225 if (fbi
->fix
.smem_start
)
226 mxcfb_unmap_video_memory(fbi
);
228 if (mxcfb_map_video_memory(fbi
) < 0)
232 setup_disp_channel1(fbi
);
234 memset(&sig_cfg
, 0, sizeof(sig_cfg
));
235 if (fbi
->var
.vmode
& FB_VMODE_INTERLACED
) {
236 sig_cfg
.interlaced
= 1;
237 out_pixel_fmt
= IPU_PIX_FMT_YUV444
;
239 if (mxc_fbi
->ipu_di_pix_fmt
)
240 out_pixel_fmt
= mxc_fbi
->ipu_di_pix_fmt
;
242 out_pixel_fmt
= IPU_PIX_FMT_RGB666
;
244 if (fbi
->var
.vmode
& FB_VMODE_ODD_FLD_FIRST
) /* PAL */
245 sig_cfg
.odd_field_first
= 1;
246 if ((fbi
->var
.sync
& FB_SYNC_EXT
) || ext_clk_used
)
248 if (fbi
->var
.sync
& FB_SYNC_HOR_HIGH_ACT
)
249 sig_cfg
.Hsync_pol
= 1;
250 if (fbi
->var
.sync
& FB_SYNC_VERT_HIGH_ACT
)
251 sig_cfg
.Vsync_pol
= 1;
252 if (!(fbi
->var
.sync
& FB_SYNC_CLK_LAT_FALL
))
254 if (fbi
->var
.sync
& FB_SYNC_DATA_INVERT
)
255 sig_cfg
.data_pol
= 1;
256 if (!(fbi
->var
.sync
& FB_SYNC_OE_LOW_ACT
))
257 sig_cfg
.enable_pol
= 1;
258 if (fbi
->var
.sync
& FB_SYNC_CLK_IDLE_EN
)
259 sig_cfg
.clkidle_en
= 1;
261 debug("pixclock = %lu Hz\n", PICOS2KHZ(fbi
->var
.pixclock
) * 1000UL);
263 if (ipu_init_sync_panel(mxc_fbi
->ipu_di
,
264 (PICOS2KHZ(fbi
->var
.pixclock
)) * 1000UL,
265 fbi
->var
.xres
, fbi
->var
.yres
,
267 fbi
->var
.left_margin
,
269 fbi
->var
.right_margin
,
270 fbi
->var
.upper_margin
,
272 fbi
->var
.lower_margin
,
274 puts("mxcfb: Error initializing panel.\n");
278 retval
= setup_disp_channel2(fbi
);
282 if (mxc_fbi
->blank
== FB_BLANK_UNBLANK
)
283 ipu_enable_channel(mxc_fbi
->ipu_ch
);
289 * Check framebuffer variable parameters and adjust to valid values.
291 * @param var framebuffer variable parameters
293 * @param info framebuffer information pointer
295 static int mxcfb_check_var(struct fb_var_screeninfo
*var
, struct fb_info
*info
)
300 if (var
->xres_virtual
< var
->xres
)
301 var
->xres_virtual
= var
->xres
;
302 if (var
->yres_virtual
< var
->yres
)
303 var
->yres_virtual
= var
->yres
;
305 if ((var
->bits_per_pixel
!= 32) && (var
->bits_per_pixel
!= 24) &&
306 (var
->bits_per_pixel
!= 16) && (var
->bits_per_pixel
!= 8))
307 var
->bits_per_pixel
= default_bpp
;
309 switch (var
->bits_per_pixel
) {
313 var
->red
.msb_right
= 0;
315 var
->green
.length
= 3;
316 var
->green
.offset
= 2;
317 var
->green
.msb_right
= 0;
319 var
->blue
.length
= 2;
320 var
->blue
.offset
= 0;
321 var
->blue
.msb_right
= 0;
323 var
->transp
.length
= 0;
324 var
->transp
.offset
= 0;
325 var
->transp
.msb_right
= 0;
329 var
->red
.offset
= 11;
330 var
->red
.msb_right
= 0;
332 var
->green
.length
= 6;
333 var
->green
.offset
= 5;
334 var
->green
.msb_right
= 0;
336 var
->blue
.length
= 5;
337 var
->blue
.offset
= 0;
338 var
->blue
.msb_right
= 0;
340 var
->transp
.length
= 0;
341 var
->transp
.offset
= 0;
342 var
->transp
.msb_right
= 0;
346 var
->red
.offset
= 16;
347 var
->red
.msb_right
= 0;
349 var
->green
.length
= 8;
350 var
->green
.offset
= 8;
351 var
->green
.msb_right
= 0;
353 var
->blue
.length
= 8;
354 var
->blue
.offset
= 0;
355 var
->blue
.msb_right
= 0;
357 var
->transp
.length
= 0;
358 var
->transp
.offset
= 0;
359 var
->transp
.msb_right
= 0;
363 var
->red
.offset
= 16;
364 var
->red
.msb_right
= 0;
366 var
->green
.length
= 8;
367 var
->green
.offset
= 8;
368 var
->green
.msb_right
= 0;
370 var
->blue
.length
= 8;
371 var
->blue
.offset
= 0;
372 var
->blue
.msb_right
= 0;
374 var
->transp
.length
= 8;
375 var
->transp
.offset
= 24;
376 var
->transp
.msb_right
= 0;
380 if (var
->pixclock
< 1000) {
381 htotal
= var
->xres
+ var
->right_margin
+ var
->hsync_len
+
383 vtotal
= var
->yres
+ var
->lower_margin
+ var
->vsync_len
+
385 var
->pixclock
= (vtotal
* htotal
* 6UL) / 100UL;
386 var
->pixclock
= KHZ2PICOS(var
->pixclock
);
387 printf("pixclock set for 60Hz refresh = %u ps\n",
398 static int mxcfb_map_video_memory(struct fb_info
*fbi
)
400 if (fbi
->fix
.smem_len
< fbi
->var
.yres_virtual
* fbi
->fix
.line_length
) {
401 fbi
->fix
.smem_len
= fbi
->var
.yres_virtual
*
402 fbi
->fix
.line_length
;
404 fbi
->fix
.smem_len
= roundup(fbi
->fix
.smem_len
, ARCH_DMA_MINALIGN
);
405 fbi
->screen_base
= (char *)memalign(ARCH_DMA_MINALIGN
,
407 fbi
->fix
.smem_start
= (unsigned long)fbi
->screen_base
;
408 if (fbi
->screen_base
== 0) {
409 puts("Unable to allocate framebuffer memory\n");
410 fbi
->fix
.smem_len
= 0;
411 fbi
->fix
.smem_start
= 0;
415 debug("allocated fb @ paddr=0x%08X, size=%d.\n",
416 (uint32_t) fbi
->fix
.smem_start
, fbi
->fix
.smem_len
);
418 fbi
->screen_size
= fbi
->fix
.smem_len
;
420 gd
->fb_base
= fbi
->fix
.smem_start
;
422 /* Clear the screen */
423 memset((char *)fbi
->screen_base
, 0, fbi
->fix
.smem_len
);
428 static int mxcfb_unmap_video_memory(struct fb_info
*fbi
)
430 fbi
->screen_base
= 0;
431 fbi
->fix
.smem_start
= 0;
432 fbi
->fix
.smem_len
= 0;
437 * Initializes the framebuffer information pointer. After allocating
438 * sufficient memory for the framebuffer structure, the fields are
439 * filled with custom information passed in from the configurable
440 * structures. This includes information such as bits per pixel,
441 * color maps, screen width/height and RGBA offsets.
443 * @return Framebuffer structure initialized with our information
445 static struct fb_info
*mxcfb_init_fbinfo(void)
447 #define BYTES_PER_LONG 4
448 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
450 struct mxcfb_info
*mxcfbi
;
452 int size
= sizeof(struct mxcfb_info
) + PADDING
+
453 sizeof(struct fb_info
);
455 debug("%s: %d %d %d %d\n",
459 sizeof(struct mxcfb_info
),
460 sizeof(struct fb_info
));
462 * Allocate sufficient memory for the fb structure
471 fbi
= (struct fb_info
*)p
;
472 fbi
->par
= p
+ sizeof(struct fb_info
) + PADDING
;
474 mxcfbi
= (struct mxcfb_info
*)fbi
->par
;
475 debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
476 (unsigned int)fbi
, (unsigned int)mxcfbi
);
478 fbi
->var
.activate
= FB_ACTIVATE_NOW
;
480 fbi
->flags
= FBINFO_FLAG_DEFAULT
;
481 fbi
->pseudo_palette
= mxcfbi
->pseudo_palette
;
487 * Probe routine for the framebuffer driver. It is called during the
488 * driver binding process. The following functions are performed in
489 * this routine: Framebuffer initialization, Memory allocation and
490 * mapping, Framebuffer registration, IPU initialization.
492 * @return Appropriate error code to the kernel common code
494 static int mxcfb_probe(u32 interface_pix_fmt
, uint8_t disp
,
495 struct fb_videomode
const *mode
)
498 struct mxcfb_info
*mxcfbi
;
502 * Initialize FB structures
504 fbi
= mxcfb_init_fbinfo();
509 mxcfbi
= (struct mxcfb_info
*)fbi
->par
;
512 mxcfbi
->ipu_ch
= MEM_BG_SYNC
;
513 mxcfbi
->blank
= FB_BLANK_UNBLANK
;
515 mxcfbi
->ipu_ch
= MEM_DC_SYNC
;
516 mxcfbi
->blank
= FB_BLANK_POWERDOWN
;
519 mxcfbi
->ipu_di
= disp
;
521 ipu_disp_set_global_alpha(mxcfbi
->ipu_ch
, 1, 0x80);
522 ipu_disp_set_color_key(mxcfbi
->ipu_ch
, 0, 0);
523 strcpy(fbi
->fix
.id
, "DISP3 BG");
527 mxcfb_info
[mxcfbi
->ipu_di
] = fbi
;
529 /* Need dummy values until real panel is configured */
531 mxcfbi
->ipu_di_pix_fmt
= interface_pix_fmt
;
532 fb_videomode_to_var(&fbi
->var
, mode
);
533 fbi
->var
.bits_per_pixel
= 16;
534 fbi
->fix
.line_length
= fbi
->var
.xres
* (fbi
->var
.bits_per_pixel
/ 8);
535 fbi
->fix
.smem_len
= fbi
->var
.yres_virtual
* fbi
->fix
.line_length
;
537 mxcfb_check_var(&fbi
->var
, fbi
);
539 /* Default Y virtual size is 2x panel size */
540 fbi
->var
.yres_virtual
= fbi
->var
.yres
* 2;
544 /* allocate fb first */
545 if (mxcfb_map_video_memory(fbi
) < 0)
550 panel
.winSizeX
= mode
->xres
;
551 panel
.winSizeY
= mode
->yres
;
552 panel
.plnSizeX
= mode
->xres
;
553 panel
.plnSizeY
= mode
->yres
;
555 panel
.frameAdrs
= (u32
)fbi
->screen_base
;
556 panel
.memSize
= fbi
->screen_size
;
558 panel
.gdfBytesPP
= 2;
559 panel
.gdfIndex
= GDF_16BIT_565RGB
;
561 ipu_dump_registers();
569 void ipuv3_fb_shutdown(void)
572 struct ipu_stat
*stat
= (struct ipu_stat
*)IPU_STAT
;
574 for (i
= 0; i
< ARRAY_SIZE(mxcfb_info
); i
++) {
575 struct fb_info
*fbi
= mxcfb_info
[i
];
577 struct mxcfb_info
*mxc_fbi
= fbi
->par
;
578 ipu_disable_channel(mxc_fbi
->ipu_ch
);
579 ipu_uninit_channel(mxc_fbi
->ipu_ch
);
582 for (i
= 0; i
< ARRAY_SIZE(stat
->int_stat
); i
++) {
583 __raw_writel(__raw_readl(&stat
->int_stat
[i
]),
588 void *video_hw_init(void)
594 puts("Error initializing IPU\n");
596 ret
= mxcfb_probe(gpixfmt
, gdisp
, gmode
);
597 debug("Framebuffer at 0x%x\n", (unsigned int)panel
.frameAdrs
);
599 return (void *)&panel
;
602 int ipuv3_fb_init(struct fb_videomode
const *mode
,