1 // SPDX-License-Identifier: GPL-2.0+
6 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
8 * MX51 Linux framebuffer:
10 * (C) Copyright 2004-2010 Freescale Semiconductor, Inc.
14 #include <linux/errno.h>
15 #include <asm/global_data.h>
16 #include <linux/string.h>
17 #include <linux/list.h>
22 #include "videomodes.h"
27 DECLARE_GLOBAL_DATA_PTR
;
29 static int mxcfb_map_video_memory(struct fb_info
*fbi
);
30 static int mxcfb_unmap_video_memory(struct fb_info
*fbi
);
33 static GraphicDevice panel
;
34 static struct fb_videomode
const *gmode
;
36 static uint32_t gpixfmt
;
38 static void fb_videomode_to_var(struct fb_var_screeninfo
*var
,
39 const struct fb_videomode
*mode
)
41 var
->xres
= mode
->xres
;
42 var
->yres
= mode
->yres
;
43 var
->xres_virtual
= mode
->xres
;
44 var
->yres_virtual
= mode
->yres
;
47 var
->pixclock
= mode
->pixclock
;
48 var
->left_margin
= mode
->left_margin
;
49 var
->right_margin
= mode
->right_margin
;
50 var
->upper_margin
= mode
->upper_margin
;
51 var
->lower_margin
= mode
->lower_margin
;
52 var
->hsync_len
= mode
->hsync_len
;
53 var
->vsync_len
= mode
->vsync_len
;
54 var
->sync
= mode
->sync
;
55 var
->vmode
= mode
->vmode
& FB_VMODE_MASK
;
59 * Structure containing the MXC specific framebuffer information.
66 unsigned char overlay
;
67 unsigned char alpha_chan_en
;
68 dma_addr_t alpha_phy_addr0
;
69 dma_addr_t alpha_phy_addr1
;
70 void *alpha_virt_addr0
;
71 void *alpha_virt_addr1
;
72 uint32_t alpha_mem_len
;
74 uint32_t cur_ipu_alpha_buf
;
76 u32 pseudo_palette
[16];
86 static unsigned long default_bpp
= 16;
87 static unsigned char g_dp_in_use
;
88 static struct fb_info
*mxcfb_info
[3];
89 static int ext_clk_used
;
91 static uint32_t bpp_to_pixfmt(struct fb_info
*fbi
)
95 debug("bpp_to_pixfmt: %d\n", fbi
->var
.bits_per_pixel
);
98 return fbi
->var
.nonstd
;
100 switch (fbi
->var
.bits_per_pixel
) {
102 pixfmt
= IPU_PIX_FMT_BGR24
;
105 pixfmt
= IPU_PIX_FMT_BGR32
;
108 pixfmt
= IPU_PIX_FMT_RGB565
;
115 * Set fixed framebuffer parameters based on variable settings.
117 * @param info framebuffer information pointer
119 static int mxcfb_set_fix(struct fb_info
*info
)
121 struct fb_fix_screeninfo
*fix
= &info
->fix
;
122 struct fb_var_screeninfo
*var
= &info
->var
;
124 fix
->line_length
= var
->xres_virtual
* var
->bits_per_pixel
/ 8;
126 fix
->type
= FB_TYPE_PACKED_PIXELS
;
127 fix
->accel
= FB_ACCEL_NONE
;
128 fix
->visual
= FB_VISUAL_TRUECOLOR
;
135 static int setup_disp_channel1(struct fb_info
*fbi
)
137 ipu_channel_params_t params
;
138 struct mxcfb_info
*mxc_fbi
= (struct mxcfb_info
*)fbi
->par
;
140 memset(¶ms
, 0, sizeof(params
));
141 params
.mem_dp_bg_sync
.di
= mxc_fbi
->ipu_di
;
143 debug("%s called\n", __func__
);
145 * Assuming interlaced means yuv output, below setting also
146 * valid for mem_dc_sync. FG should have the same vmode as BG.
148 if (fbi
->var
.vmode
& FB_VMODE_INTERLACED
) {
149 params
.mem_dp_bg_sync
.interlaced
= 1;
150 params
.mem_dp_bg_sync
.out_pixel_fmt
=
153 if (mxc_fbi
->ipu_di_pix_fmt
) {
154 params
.mem_dp_bg_sync
.out_pixel_fmt
=
155 mxc_fbi
->ipu_di_pix_fmt
;
157 params
.mem_dp_bg_sync
.out_pixel_fmt
=
161 params
.mem_dp_bg_sync
.in_pixel_fmt
= bpp_to_pixfmt(fbi
);
162 if (mxc_fbi
->alpha_chan_en
)
163 params
.mem_dp_bg_sync
.alpha_chan_en
= 1;
165 ipu_init_channel(mxc_fbi
->ipu_ch
, ¶ms
);
170 static int setup_disp_channel2(struct fb_info
*fbi
)
173 struct mxcfb_info
*mxc_fbi
= (struct mxcfb_info
*)fbi
->par
;
175 mxc_fbi
->cur_ipu_buf
= 1;
176 if (mxc_fbi
->alpha_chan_en
)
177 mxc_fbi
->cur_ipu_alpha_buf
= 1;
179 fbi
->var
.xoffset
= fbi
->var
.yoffset
= 0;
181 debug("%s: %x %d %d %d %lx %lx\n",
186 fbi
->fix
.line_length
,
188 fbi
->fix
.smem_start
+
189 (fbi
->fix
.line_length
* fbi
->var
.yres
));
191 retval
= ipu_init_channel_buffer(mxc_fbi
->ipu_ch
, IPU_INPUT_BUFFER
,
193 fbi
->var
.xres
, fbi
->var
.yres
,
194 fbi
->fix
.line_length
,
195 fbi
->fix
.smem_start
+
196 (fbi
->fix
.line_length
* fbi
->var
.yres
),
200 printf("ipu_init_channel_buffer error %d\n", retval
);
206 * Set framebuffer parameters and change the operating mode.
208 * @param info framebuffer information pointer
210 static int mxcfb_set_par(struct fb_info
*fbi
)
214 ipu_di_signal_cfg_t sig_cfg
;
215 struct mxcfb_info
*mxc_fbi
= (struct mxcfb_info
*)fbi
->par
;
216 uint32_t out_pixel_fmt
;
218 ipu_disable_channel(mxc_fbi
->ipu_ch
);
219 ipu_uninit_channel(mxc_fbi
->ipu_ch
);
222 mem_len
= fbi
->var
.yres_virtual
* fbi
->fix
.line_length
;
223 if (!fbi
->fix
.smem_start
|| (mem_len
> fbi
->fix
.smem_len
)) {
224 if (fbi
->fix
.smem_start
)
225 mxcfb_unmap_video_memory(fbi
);
227 if (mxcfb_map_video_memory(fbi
) < 0)
231 setup_disp_channel1(fbi
);
233 memset(&sig_cfg
, 0, sizeof(sig_cfg
));
234 if (fbi
->var
.vmode
& FB_VMODE_INTERLACED
) {
235 sig_cfg
.interlaced
= 1;
236 out_pixel_fmt
= IPU_PIX_FMT_YUV444
;
238 if (mxc_fbi
->ipu_di_pix_fmt
)
239 out_pixel_fmt
= mxc_fbi
->ipu_di_pix_fmt
;
241 out_pixel_fmt
= IPU_PIX_FMT_RGB666
;
243 if (fbi
->var
.vmode
& FB_VMODE_ODD_FLD_FIRST
) /* PAL */
244 sig_cfg
.odd_field_first
= 1;
245 if ((fbi
->var
.sync
& FB_SYNC_EXT
) || ext_clk_used
)
247 if (fbi
->var
.sync
& FB_SYNC_HOR_HIGH_ACT
)
248 sig_cfg
.Hsync_pol
= 1;
249 if (fbi
->var
.sync
& FB_SYNC_VERT_HIGH_ACT
)
250 sig_cfg
.Vsync_pol
= 1;
251 if (!(fbi
->var
.sync
& FB_SYNC_CLK_LAT_FALL
))
253 if (fbi
->var
.sync
& FB_SYNC_DATA_INVERT
)
254 sig_cfg
.data_pol
= 1;
255 if (!(fbi
->var
.sync
& FB_SYNC_OE_LOW_ACT
))
256 sig_cfg
.enable_pol
= 1;
257 if (fbi
->var
.sync
& FB_SYNC_CLK_IDLE_EN
)
258 sig_cfg
.clkidle_en
= 1;
260 debug("pixclock = %lu Hz\n", PICOS2KHZ(fbi
->var
.pixclock
) * 1000UL);
262 if (ipu_init_sync_panel(mxc_fbi
->ipu_di
,
263 (PICOS2KHZ(fbi
->var
.pixclock
)) * 1000UL,
264 fbi
->var
.xres
, fbi
->var
.yres
,
266 fbi
->var
.left_margin
,
268 fbi
->var
.right_margin
,
269 fbi
->var
.upper_margin
,
271 fbi
->var
.lower_margin
,
273 puts("mxcfb: Error initializing panel.\n");
277 retval
= setup_disp_channel2(fbi
);
281 if (mxc_fbi
->blank
== FB_BLANK_UNBLANK
)
282 ipu_enable_channel(mxc_fbi
->ipu_ch
);
288 * Check framebuffer variable parameters and adjust to valid values.
290 * @param var framebuffer variable parameters
292 * @param info framebuffer information pointer
294 static int mxcfb_check_var(struct fb_var_screeninfo
*var
, struct fb_info
*info
)
299 if (var
->xres_virtual
< var
->xres
)
300 var
->xres_virtual
= var
->xres
;
301 if (var
->yres_virtual
< var
->yres
)
302 var
->yres_virtual
= var
->yres
;
304 if ((var
->bits_per_pixel
!= 32) && (var
->bits_per_pixel
!= 24) &&
305 (var
->bits_per_pixel
!= 16) && (var
->bits_per_pixel
!= 8))
306 var
->bits_per_pixel
= default_bpp
;
308 switch (var
->bits_per_pixel
) {
312 var
->red
.msb_right
= 0;
314 var
->green
.length
= 3;
315 var
->green
.offset
= 2;
316 var
->green
.msb_right
= 0;
318 var
->blue
.length
= 2;
319 var
->blue
.offset
= 0;
320 var
->blue
.msb_right
= 0;
322 var
->transp
.length
= 0;
323 var
->transp
.offset
= 0;
324 var
->transp
.msb_right
= 0;
328 var
->red
.offset
= 11;
329 var
->red
.msb_right
= 0;
331 var
->green
.length
= 6;
332 var
->green
.offset
= 5;
333 var
->green
.msb_right
= 0;
335 var
->blue
.length
= 5;
336 var
->blue
.offset
= 0;
337 var
->blue
.msb_right
= 0;
339 var
->transp
.length
= 0;
340 var
->transp
.offset
= 0;
341 var
->transp
.msb_right
= 0;
345 var
->red
.offset
= 16;
346 var
->red
.msb_right
= 0;
348 var
->green
.length
= 8;
349 var
->green
.offset
= 8;
350 var
->green
.msb_right
= 0;
352 var
->blue
.length
= 8;
353 var
->blue
.offset
= 0;
354 var
->blue
.msb_right
= 0;
356 var
->transp
.length
= 0;
357 var
->transp
.offset
= 0;
358 var
->transp
.msb_right
= 0;
362 var
->red
.offset
= 16;
363 var
->red
.msb_right
= 0;
365 var
->green
.length
= 8;
366 var
->green
.offset
= 8;
367 var
->green
.msb_right
= 0;
369 var
->blue
.length
= 8;
370 var
->blue
.offset
= 0;
371 var
->blue
.msb_right
= 0;
373 var
->transp
.length
= 8;
374 var
->transp
.offset
= 24;
375 var
->transp
.msb_right
= 0;
379 if (var
->pixclock
< 1000) {
380 htotal
= var
->xres
+ var
->right_margin
+ var
->hsync_len
+
382 vtotal
= var
->yres
+ var
->lower_margin
+ var
->vsync_len
+
384 var
->pixclock
= (vtotal
* htotal
* 6UL) / 100UL;
385 var
->pixclock
= KHZ2PICOS(var
->pixclock
);
386 printf("pixclock set for 60Hz refresh = %u ps\n",
397 static int mxcfb_map_video_memory(struct fb_info
*fbi
)
399 if (fbi
->fix
.smem_len
< fbi
->var
.yres_virtual
* fbi
->fix
.line_length
) {
400 fbi
->fix
.smem_len
= fbi
->var
.yres_virtual
*
401 fbi
->fix
.line_length
;
403 fbi
->fix
.smem_len
= roundup(fbi
->fix
.smem_len
, ARCH_DMA_MINALIGN
);
404 fbi
->screen_base
= (char *)memalign(ARCH_DMA_MINALIGN
,
406 fbi
->fix
.smem_start
= (unsigned long)fbi
->screen_base
;
407 if (fbi
->screen_base
== 0) {
408 puts("Unable to allocate framebuffer memory\n");
409 fbi
->fix
.smem_len
= 0;
410 fbi
->fix
.smem_start
= 0;
414 debug("allocated fb @ paddr=0x%08X, size=%d.\n",
415 (uint32_t) fbi
->fix
.smem_start
, fbi
->fix
.smem_len
);
417 fbi
->screen_size
= fbi
->fix
.smem_len
;
419 gd
->fb_base
= fbi
->fix
.smem_start
;
421 /* Clear the screen */
422 memset((char *)fbi
->screen_base
, 0, fbi
->fix
.smem_len
);
427 static int mxcfb_unmap_video_memory(struct fb_info
*fbi
)
429 fbi
->screen_base
= 0;
430 fbi
->fix
.smem_start
= 0;
431 fbi
->fix
.smem_len
= 0;
436 * Initializes the framebuffer information pointer. After allocating
437 * sufficient memory for the framebuffer structure, the fields are
438 * filled with custom information passed in from the configurable
439 * structures. This includes information such as bits per pixel,
440 * color maps, screen width/height and RGBA offsets.
442 * @return Framebuffer structure initialized with our information
444 static struct fb_info
*mxcfb_init_fbinfo(void)
446 #define BYTES_PER_LONG 4
447 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
449 struct mxcfb_info
*mxcfbi
;
451 int size
= sizeof(struct mxcfb_info
) + PADDING
+
452 sizeof(struct fb_info
);
454 debug("%s: %d %d %d %d\n",
458 sizeof(struct mxcfb_info
),
459 sizeof(struct fb_info
));
461 * Allocate sufficient memory for the fb structure
470 fbi
= (struct fb_info
*)p
;
471 fbi
->par
= p
+ sizeof(struct fb_info
) + PADDING
;
473 mxcfbi
= (struct mxcfb_info
*)fbi
->par
;
474 debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
475 (unsigned int)fbi
, (unsigned int)mxcfbi
);
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
, uint8_t disp
,
494 struct fb_videomode
const *mode
)
497 struct mxcfb_info
*mxcfbi
;
501 * Initialize FB structures
503 fbi
= mxcfb_init_fbinfo();
508 mxcfbi
= (struct mxcfb_info
*)fbi
->par
;
511 mxcfbi
->ipu_ch
= MEM_BG_SYNC
;
512 mxcfbi
->blank
= FB_BLANK_UNBLANK
;
514 mxcfbi
->ipu_ch
= MEM_DC_SYNC
;
515 mxcfbi
->blank
= FB_BLANK_POWERDOWN
;
518 mxcfbi
->ipu_di
= disp
;
520 ipu_disp_set_global_alpha(mxcfbi
->ipu_ch
, 1, 0x80);
521 ipu_disp_set_color_key(mxcfbi
->ipu_ch
, 0, 0);
522 strcpy(fbi
->fix
.id
, "DISP3 BG");
526 mxcfb_info
[mxcfbi
->ipu_di
] = fbi
;
528 /* Need dummy values until real panel is configured */
530 mxcfbi
->ipu_di_pix_fmt
= interface_pix_fmt
;
531 fb_videomode_to_var(&fbi
->var
, mode
);
532 fbi
->var
.bits_per_pixel
= 16;
533 fbi
->fix
.line_length
= fbi
->var
.xres
* (fbi
->var
.bits_per_pixel
/ 8);
534 fbi
->fix
.smem_len
= fbi
->var
.yres_virtual
* fbi
->fix
.line_length
;
536 mxcfb_check_var(&fbi
->var
, fbi
);
538 /* Default Y virtual size is 2x panel size */
539 fbi
->var
.yres_virtual
= fbi
->var
.yres
* 2;
543 /* allocate fb first */
544 if (mxcfb_map_video_memory(fbi
) < 0)
549 panel
.winSizeX
= mode
->xres
;
550 panel
.winSizeY
= mode
->yres
;
551 panel
.plnSizeX
= mode
->xres
;
552 panel
.plnSizeY
= mode
->yres
;
554 panel
.frameAdrs
= (u32
)fbi
->screen_base
;
555 panel
.memSize
= fbi
->screen_size
;
557 panel
.gdfBytesPP
= 2;
558 panel
.gdfIndex
= GDF_16BIT_565RGB
;
560 ipu_dump_registers();
568 void ipuv3_fb_shutdown(void)
571 struct ipu_stat
*stat
= (struct ipu_stat
*)IPU_STAT
;
573 if (!ipu_clk_enabled())
576 for (i
= 0; i
< ARRAY_SIZE(mxcfb_info
); i
++) {
577 struct fb_info
*fbi
= mxcfb_info
[i
];
579 struct mxcfb_info
*mxc_fbi
= fbi
->par
;
580 ipu_disable_channel(mxc_fbi
->ipu_ch
);
581 ipu_uninit_channel(mxc_fbi
->ipu_ch
);
584 for (i
= 0; i
< ARRAY_SIZE(stat
->int_stat
); i
++) {
585 __raw_writel(__raw_readl(&stat
->int_stat
[i
]),
590 void *video_hw_init(void)
596 puts("Error initializing IPU\n");
598 ret
= mxcfb_probe(gpixfmt
, gdisp
, gmode
);
599 debug("Framebuffer at 0x%x\n", (unsigned int)panel
.frameAdrs
);
601 return (void *)&panel
;
604 int ipuv3_fb_init(struct fb_videomode
const *mode
,