2
* SuperH Mobile LCDC Framebuffer
4
* Copyright (c) 2008 Magnus Damm
6
* This file is subject to the terms and conditions of the GNU General Public
7
* License. See the file "COPYING" in the main directory of this archive
11
#include <linux/kernel.h>
12
#include <linux/init.h>
13
#include <linux/delay.h>
15
#include <linux/clk.h>
16
#include <linux/pm_runtime.h>
17
#include <linux/platform_device.h>
18
#include <linux/dma-mapping.h>
19
#include <linux/interrupt.h>
20
#include <linux/vmalloc.h>
21
#include <linux/ioctl.h>
22
#include <linux/slab.h>
23
#include <linux/console.h>
24
#include <linux/backlight.h>
25
#include <linux/gpio.h>
26
#include <linux/module.h>
27
#include <video/sh_mobile_lcdc.h>
28
#include <video/sh_mobile_meram.h>
29
#include <linux/atomic.h>
31
#include "sh_mobile_lcdcfb.h"
33
#define SIDE_B_OFFSET 0x1000
34
#define MIRROR_OFFSET 0x2000
39
static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
59
static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
77
static const struct fb_videomode default_720p = {
92
.sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
95
struct sh_mobile_lcdc_priv {
101
unsigned long lddckr;
102
struct sh_mobile_lcdc_chan ch[2];
103
struct notifier_block notifier;
105
int forced_bpp; /* 2 channel LCDC must share bpp setting */
106
struct sh_mobile_meram_info *meram_dev;
109
static bool banked(int reg_nr)
129
static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
130
int reg_nr, unsigned long data)
132
iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
134
iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
138
static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
139
int reg_nr, unsigned long data)
141
iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
145
static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
148
return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
151
static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
152
unsigned long reg_offs, unsigned long data)
154
iowrite32(data, priv->base + reg_offs);
157
static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
158
unsigned long reg_offs)
160
return ioread32(priv->base + reg_offs);
163
static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
164
unsigned long reg_offs,
165
unsigned long mask, unsigned long until)
167
while ((lcdc_read(priv, reg_offs) & mask) != until)
171
static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
173
return chan->cfg.chan == LCDC_CHAN_SUBLCD;
176
static void lcdc_sys_write_index(void *handle, unsigned long data)
178
struct sh_mobile_lcdc_chan *ch = handle;
180
lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
181
lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
182
lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
183
(lcdc_chan_is_sublcd(ch) ? 2 : 0));
184
lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
187
static void lcdc_sys_write_data(void *handle, unsigned long data)
189
struct sh_mobile_lcdc_chan *ch = handle;
191
lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
192
lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
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lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
194
(lcdc_chan_is_sublcd(ch) ? 2 : 0));
195
lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
198
static unsigned long lcdc_sys_read_data(void *handle)
200
struct sh_mobile_lcdc_chan *ch = handle;
202
lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
203
lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
204
lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
205
(lcdc_chan_is_sublcd(ch) ? 2 : 0));
207
lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
209
return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
212
struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
213
lcdc_sys_write_index,
218
static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
220
if (atomic_inc_and_test(&priv->hw_usecnt)) {
222
clk_enable(priv->dot_clk);
223
pm_runtime_get_sync(priv->dev);
224
if (priv->meram_dev && priv->meram_dev->pdev)
225
pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
229
static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
231
if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
232
if (priv->meram_dev && priv->meram_dev->pdev)
233
pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
234
pm_runtime_put(priv->dev);
236
clk_disable(priv->dot_clk);
240
static int sh_mobile_lcdc_sginit(struct fb_info *info,
241
struct list_head *pagelist)
243
struct sh_mobile_lcdc_chan *ch = info->par;
244
unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
248
sg_init_table(ch->sglist, nr_pages_max);
250
list_for_each_entry(page, pagelist, lru)
251
sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
256
static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
257
struct list_head *pagelist)
259
struct sh_mobile_lcdc_chan *ch = info->par;
260
struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
262
/* enable clocks before accessing hardware */
263
sh_mobile_lcdc_clk_on(ch->lcdc);
266
* It's possible to get here without anything on the pagelist via
267
* sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
268
* invocation. In the former case, the acceleration routines are
269
* stepped in to when using the framebuffer console causing the
270
* workqueue to be scheduled without any dirty pages on the list.
272
* Despite this, a panel update is still needed given that the
273
* acceleration routines have their own methods for writing in
274
* that still need to be updated.
276
* The fsync() and empty pagelist case could be optimized for,
277
* but we don't bother, as any application exhibiting such
278
* behaviour is fundamentally broken anyways.
280
if (!list_empty(pagelist)) {
281
unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
283
/* trigger panel update */
284
dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
285
if (bcfg->start_transfer)
286
bcfg->start_transfer(bcfg->board_data, ch,
287
&sh_mobile_lcdc_sys_bus_ops);
288
lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
289
dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
291
if (bcfg->start_transfer)
292
bcfg->start_transfer(bcfg->board_data, ch,
293
&sh_mobile_lcdc_sys_bus_ops);
294
lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
298
static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
300
struct fb_deferred_io *fbdefio = info->fbdefio;
303
schedule_delayed_work(&info->deferred_work, fbdefio->delay);
306
static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
308
struct sh_mobile_lcdc_priv *priv = data;
309
struct sh_mobile_lcdc_chan *ch;
310
unsigned long ldintr;
314
/* Acknowledge interrupts and disable further VSYNC End IRQs. */
315
ldintr = lcdc_read(priv, _LDINTR);
316
lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
318
/* figure out if this interrupt is for main or sub lcd */
319
is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
321
/* wake up channel and disable clocks */
322
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
329
if (ldintr & LDINTR_FS) {
330
if (is_sub == lcdc_chan_is_sublcd(ch)) {
332
wake_up(&ch->frame_end_wait);
334
sh_mobile_lcdc_clk_off(priv);
339
if (ldintr & LDINTR_VES)
340
complete(&ch->vsync_completion);
346
static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
349
unsigned long tmp = lcdc_read(priv, _LDCNT2R);
352
/* start or stop the lcdc */
354
lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
356
lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
358
/* wait until power is applied/stopped on all channels */
359
for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
360
if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
362
tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
364
if (start && tmp == LDPMR_LPS)
366
if (!start && tmp == 0)
372
lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
375
static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
377
struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
378
unsigned long h_total, hsync_pos, display_h_total;
381
tmp = ch->ldmt1r_value;
382
tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
383
tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
384
tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
385
tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
386
tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
387
tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
388
tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
389
lcdc_write_chan(ch, LDMT1R, tmp);
392
lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
393
lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
395
/* horizontal configuration */
396
h_total = display_var->xres + display_var->hsync_len +
397
display_var->left_margin + display_var->right_margin;
398
tmp = h_total / 8; /* HTCN */
399
tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
400
lcdc_write_chan(ch, LDHCNR, tmp);
402
hsync_pos = display_var->xres + display_var->right_margin;
403
tmp = hsync_pos / 8; /* HSYNP */
404
tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
405
lcdc_write_chan(ch, LDHSYNR, tmp);
407
/* vertical configuration */
408
tmp = display_var->yres + display_var->vsync_len +
409
display_var->upper_margin + display_var->lower_margin; /* VTLN */
410
tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
411
lcdc_write_chan(ch, LDVLNR, tmp);
413
tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
414
tmp |= display_var->vsync_len << 16; /* VSYNW */
415
lcdc_write_chan(ch, LDVSYNR, tmp);
417
/* Adjust horizontal synchronisation for HDMI */
418
display_h_total = display_var->xres + display_var->hsync_len +
419
display_var->left_margin + display_var->right_margin;
420
tmp = ((display_var->xres & 7) << 24) |
421
((display_h_total & 7) << 16) |
422
((display_var->hsync_len & 7) << 8) |
424
lcdc_write_chan(ch, LDHAJR, tmp);
428
* __sh_mobile_lcdc_start - Configure and tart the LCDC
431
* Configure all enabled channels and start the LCDC device. All external
432
* devices (clocks, MERAM, panels, ...) are not touched by this function.
434
static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
436
struct sh_mobile_lcdc_chan *ch;
441
/* Enable LCDC channels. Read data from external memory, avoid using the
444
lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
446
/* Stop the LCDC first and disable all interrupts. */
447
sh_mobile_lcdc_start_stop(priv, 0);
448
lcdc_write(priv, _LDINTR, 0);
450
/* Configure power supply, dot clocks and start them. */
452
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
458
bpp = ch->info->var.bits_per_pixel;
461
lcdc_write_chan(ch, LDPMR, 0);
463
m = ch->cfg.clock_divider;
467
/* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
470
lcdc_write_chan(ch, LDDCKPAT1R, 0);
471
lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
475
tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
478
lcdc_write(priv, _LDDCKR, tmp);
479
lcdc_write(priv, _LDDCKSTPR, 0);
480
lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
482
/* Setup geometry, format, frame buffer memory and operation mode. */
483
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
488
sh_mobile_lcdc_geometry(ch);
490
if (ch->info->var.nonstd) {
491
tmp = (ch->info->var.nonstd << 16);
492
switch (ch->info->var.bits_per_pixel) {
505
switch (ch->info->var.bits_per_pixel) {
507
tmp = LDDFR_PKF_RGB16;
510
tmp = LDDFR_PKF_RGB24;
514
tmp = LDDFR_PKF_ARGB32;
519
lcdc_write_chan(ch, LDDFR, tmp);
520
lcdc_write_chan(ch, LDMLSR, ch->pitch);
521
lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
522
if (ch->info->var.nonstd)
523
lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
525
/* When using deferred I/O mode, configure the LCDC for one-shot
526
* operation and enable the frame end interrupt. Otherwise use
527
* continuous read mode.
529
if (ch->ldmt1r_value & LDMT1R_IFM &&
530
ch->cfg.sys_bus_cfg.deferred_io_msec) {
531
lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
532
lcdc_write(priv, _LDINTR, LDINTR_FE);
534
lcdc_write_chan(ch, LDSM1R, 0);
538
/* Word and long word swap. */
539
if (priv->ch[0].info->var.nonstd)
540
tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
544
tmp = LDDDSR_LS | LDDDSR_WS;
547
tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
555
lcdc_write(priv, _LDDDSR, tmp);
557
/* Enable the display output. */
558
lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
559
sh_mobile_lcdc_start_stop(priv, 1);
563
static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
565
struct sh_mobile_meram_info *mdev = priv->meram_dev;
566
struct sh_mobile_lcdc_board_cfg *board_cfg;
567
struct sh_mobile_lcdc_chan *ch;
572
/* enable clocks before accessing the hardware */
573
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
574
if (priv->ch[k].enabled)
575
sh_mobile_lcdc_clk_on(priv);
579
lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
580
lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
582
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
588
board_cfg = &ch->cfg.board_cfg;
589
if (board_cfg->setup_sys) {
590
ret = board_cfg->setup_sys(board_cfg->board_data, ch,
591
&sh_mobile_lcdc_sys_bus_ops);
597
/* Compute frame buffer base address and pitch for each channel. */
598
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
599
struct sh_mobile_meram_cfg *cfg;
606
ch->base_addr_y = ch->info->fix.smem_start;
607
ch->base_addr_c = ch->base_addr_y
609
* ch->info->var.yres_virtual;
610
ch->pitch = ch->info->fix.line_length;
612
/* Enable MERAM if possible. */
613
cfg = ch->cfg.meram_cfg;
614
if (mdev == NULL || mdev->ops == NULL || cfg == NULL)
617
/* we need to de-init configured ICBs before we can
618
* re-initialize them.
620
if (ch->meram_enabled) {
621
mdev->ops->meram_unregister(mdev, cfg);
622
ch->meram_enabled = 0;
625
if (!ch->info->var.nonstd)
626
pixelformat = SH_MOBILE_MERAM_PF_RGB;
627
else if (ch->info->var.bits_per_pixel == 24)
628
pixelformat = SH_MOBILE_MERAM_PF_NV24;
630
pixelformat = SH_MOBILE_MERAM_PF_NV;
632
ret = mdev->ops->meram_register(mdev, cfg, ch->pitch,
633
ch->info->var.yres, pixelformat,
634
ch->base_addr_y, ch->base_addr_c,
635
&ch->base_addr_y, &ch->base_addr_c,
638
ch->meram_enabled = 1;
641
/* Start the LCDC. */
642
__sh_mobile_lcdc_start(priv);
644
/* Setup deferred I/O, tell the board code to enable the panels, and
647
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
652
tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
653
if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
654
ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
655
ch->defio.delay = msecs_to_jiffies(tmp);
656
ch->info->fbdefio = &ch->defio;
657
fb_deferred_io_init(ch->info);
660
board_cfg = &ch->cfg.board_cfg;
661
if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
662
board_cfg->display_on(board_cfg->board_data, ch->info);
663
module_put(board_cfg->owner);
667
ch->bl->props.power = FB_BLANK_UNBLANK;
668
backlight_update_status(ch->bl);
675
static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
677
struct sh_mobile_lcdc_chan *ch;
678
struct sh_mobile_lcdc_board_cfg *board_cfg;
681
/* clean up deferred io and ask board code to disable panel */
682
for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
688
* flush frame, and wait for frame end interrupt
689
* clean up deferred io and enable clock
691
if (ch->info && ch->info->fbdefio) {
693
schedule_delayed_work(&ch->info->deferred_work, 0);
694
wait_event(ch->frame_end_wait, ch->frame_end);
695
fb_deferred_io_cleanup(ch->info);
696
ch->info->fbdefio = NULL;
697
sh_mobile_lcdc_clk_on(priv);
701
ch->bl->props.power = FB_BLANK_POWERDOWN;
702
backlight_update_status(ch->bl);
705
board_cfg = &ch->cfg.board_cfg;
706
if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
707
board_cfg->display_off(board_cfg->board_data);
708
module_put(board_cfg->owner);
711
/* disable the meram */
712
if (ch->meram_enabled) {
713
struct sh_mobile_meram_cfg *cfg;
714
struct sh_mobile_meram_info *mdev;
715
cfg = ch->cfg.meram_cfg;
716
mdev = priv->meram_dev;
717
mdev->ops->meram_unregister(mdev, cfg);
718
ch->meram_enabled = 0;
725
sh_mobile_lcdc_start_stop(priv, 0);
730
for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
731
if (priv->ch[k].enabled)
732
sh_mobile_lcdc_clk_off(priv);
735
static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
737
int interface_type = ch->cfg.interface_type;
739
switch (interface_type) {
763
/* SUBLCD only supports SYS interface */
764
if (lcdc_chan_is_sublcd(ch)) {
765
if (!(interface_type & LDMT1R_IFM))
768
interface_type &= ~LDMT1R_IFM;
771
ch->ldmt1r_value = interface_type;
775
static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
777
struct sh_mobile_lcdc_priv *priv)
781
switch (clock_source) {
784
priv->lddckr = LDDCKR_ICKSEL_BUS;
786
case LCDC_CLK_PERIPHERAL:
787
str = "peripheral_clk";
788
priv->lddckr = LDDCKR_ICKSEL_MIPI;
790
case LCDC_CLK_EXTERNAL:
792
priv->lddckr = LDDCKR_ICKSEL_HDMI;
799
priv->dot_clk = clk_get(&pdev->dev, str);
800
if (IS_ERR(priv->dot_clk)) {
801
dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
802
return PTR_ERR(priv->dot_clk);
806
/* Runtime PM support involves two step for this driver:
807
* 1) Enable Runtime PM
808
* 2) Force Runtime PM Resume since hardware is accessed from probe()
810
priv->dev = &pdev->dev;
811
pm_runtime_enable(priv->dev);
812
pm_runtime_resume(priv->dev);
816
static int sh_mobile_lcdc_setcolreg(u_int regno,
817
u_int red, u_int green, u_int blue,
818
u_int transp, struct fb_info *info)
820
u32 *palette = info->pseudo_palette;
822
if (regno >= PALETTE_NR)
825
/* only FB_VISUAL_TRUECOLOR supported */
827
red >>= 16 - info->var.red.length;
828
green >>= 16 - info->var.green.length;
829
blue >>= 16 - info->var.blue.length;
830
transp >>= 16 - info->var.transp.length;
832
palette[regno] = (red << info->var.red.offset) |
833
(green << info->var.green.offset) |
834
(blue << info->var.blue.offset) |
835
(transp << info->var.transp.offset);
840
static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
841
.id = "SH Mobile LCDC",
842
.type = FB_TYPE_PACKED_PIXELS,
843
.visual = FB_VISUAL_TRUECOLOR,
844
.accel = FB_ACCEL_NONE,
850
static void sh_mobile_lcdc_fillrect(struct fb_info *info,
851
const struct fb_fillrect *rect)
853
sys_fillrect(info, rect);
854
sh_mobile_lcdc_deferred_io_touch(info);
857
static void sh_mobile_lcdc_copyarea(struct fb_info *info,
858
const struct fb_copyarea *area)
860
sys_copyarea(info, area);
861
sh_mobile_lcdc_deferred_io_touch(info);
864
static void sh_mobile_lcdc_imageblit(struct fb_info *info,
865
const struct fb_image *image)
867
sys_imageblit(info, image);
868
sh_mobile_lcdc_deferred_io_touch(info);
871
static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
872
struct fb_info *info)
874
struct sh_mobile_lcdc_chan *ch = info->par;
875
struct sh_mobile_lcdc_priv *priv = ch->lcdc;
876
unsigned long ldrcntr;
877
unsigned long new_pan_offset;
878
unsigned long base_addr_y, base_addr_c;
879
unsigned long c_offset;
881
if (!info->var.nonstd)
882
new_pan_offset = var->yoffset * info->fix.line_length
883
+ var->xoffset * (info->var.bits_per_pixel / 8);
885
new_pan_offset = var->yoffset * info->fix.line_length
888
if (new_pan_offset == ch->pan_offset)
889
return 0; /* No change, do nothing */
891
ldrcntr = lcdc_read(priv, _LDRCNTR);
893
/* Set the source address for the next refresh */
894
base_addr_y = ch->dma_handle + new_pan_offset;
895
if (info->var.nonstd) {
897
c_offset = var->yoffset * info->fix.line_length
898
* (info->var.bits_per_pixel - 8) / 8;
899
base_addr_c = ch->dma_handle
900
+ info->var.xres * info->var.yres_virtual
903
if (info->var.bits_per_pixel == 24)
904
base_addr_c += 2 * var->xoffset;
906
base_addr_c += var->xoffset;
909
if (ch->meram_enabled) {
910
struct sh_mobile_meram_cfg *cfg;
911
struct sh_mobile_meram_info *mdev;
914
cfg = ch->cfg.meram_cfg;
915
mdev = priv->meram_dev;
916
ret = mdev->ops->meram_update(mdev, cfg,
917
base_addr_y, base_addr_c,
918
&base_addr_y, &base_addr_c);
923
ch->base_addr_y = base_addr_y;
924
ch->base_addr_c = base_addr_c;
926
lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
927
if (info->var.nonstd)
928
lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
930
if (lcdc_chan_is_sublcd(ch))
931
lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
933
lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
935
ch->pan_offset = new_pan_offset;
937
sh_mobile_lcdc_deferred_io_touch(info);
942
static int sh_mobile_wait_for_vsync(struct fb_info *info)
944
struct sh_mobile_lcdc_chan *ch = info->par;
945
unsigned long ldintr;
948
/* Enable VSync End interrupt and be careful not to acknowledge any
951
ldintr = lcdc_read(ch->lcdc, _LDINTR);
952
ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
953
lcdc_write(ch->lcdc, _LDINTR, ldintr);
955
ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
956
msecs_to_jiffies(100));
963
static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
969
case FBIO_WAITFORVSYNC:
970
retval = sh_mobile_wait_for_vsync(info);
974
retval = -ENOIOCTLCMD;
980
static void sh_mobile_fb_reconfig(struct fb_info *info)
982
struct sh_mobile_lcdc_chan *ch = info->par;
983
struct fb_videomode mode1, mode2;
984
struct fb_event event;
985
int evnt = FB_EVENT_MODE_CHANGE_ALL;
987
if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
988
/* More framebuffer users are active */
991
fb_var_to_videomode(&mode1, &ch->display_var);
992
fb_var_to_videomode(&mode2, &info->var);
994
if (fb_mode_is_equal(&mode1, &mode2))
997
/* Display has been re-plugged, framebuffer is free now, reconfigure */
998
if (fb_set_var(info, &ch->display_var) < 0)
999
/* Couldn't reconfigure, hopefully, can continue as before */
1003
* fb_set_var() calls the notifier change internally, only if
1004
* FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1005
* user event, we have to call the chain ourselves.
1008
event.data = &mode1;
1009
fb_notifier_call_chain(evnt, &event);
1013
* Locking: both .fb_release() and .fb_open() are called with info->lock held if
1014
* user == 1, or with console sem held, if user == 0.
1016
static int sh_mobile_release(struct fb_info *info, int user)
1018
struct sh_mobile_lcdc_chan *ch = info->par;
1020
mutex_lock(&ch->open_lock);
1021
dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1025
/* Nothing to reconfigure, when called from fbcon */
1028
sh_mobile_fb_reconfig(info);
1032
mutex_unlock(&ch->open_lock);
1037
static int sh_mobile_open(struct fb_info *info, int user)
1039
struct sh_mobile_lcdc_chan *ch = info->par;
1041
mutex_lock(&ch->open_lock);
1044
dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1045
mutex_unlock(&ch->open_lock);
1050
static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1052
struct sh_mobile_lcdc_chan *ch = info->par;
1053
struct sh_mobile_lcdc_priv *p = ch->lcdc;
1054
unsigned int best_dist = (unsigned int)-1;
1055
unsigned int best_xres = 0;
1056
unsigned int best_yres = 0;
1059
if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1062
/* If board code provides us with a list of available modes, make sure
1063
* we use one of them. Find the mode closest to the requested one. The
1064
* distance between two modes is defined as the size of the
1065
* non-overlapping parts of the two rectangles.
1067
for (i = 0; i < ch->cfg.num_cfg; ++i) {
1068
const struct fb_videomode *mode = &ch->cfg.lcd_cfg[i];
1071
/* We can only round up. */
1072
if (var->xres > mode->xres || var->yres > mode->yres)
1075
dist = var->xres * var->yres + mode->xres * mode->yres
1076
- 2 * min(var->xres, mode->xres)
1077
* min(var->yres, mode->yres);
1079
if (dist < best_dist) {
1080
best_xres = mode->xres;
1081
best_yres = mode->yres;
1086
/* If no available mode can be used, return an error. */
1087
if (ch->cfg.num_cfg != 0) {
1088
if (best_dist == (unsigned int)-1)
1091
var->xres = best_xres;
1092
var->yres = best_yres;
1095
/* Make sure the virtual resolution is at least as big as the visible
1098
if (var->xres_virtual < var->xres)
1099
var->xres_virtual = var->xres;
1100
if (var->yres_virtual < var->yres)
1101
var->yres_virtual = var->yres;
1103
if (var->bits_per_pixel <= 16) { /* RGB 565 */
1104
var->bits_per_pixel = 16;
1105
var->red.offset = 11;
1106
var->red.length = 5;
1107
var->green.offset = 5;
1108
var->green.length = 6;
1109
var->blue.offset = 0;
1110
var->blue.length = 5;
1111
var->transp.offset = 0;
1112
var->transp.length = 0;
1113
} else if (var->bits_per_pixel <= 24) { /* RGB 888 */
1114
var->bits_per_pixel = 24;
1115
var->red.offset = 16;
1116
var->red.length = 8;
1117
var->green.offset = 8;
1118
var->green.length = 8;
1119
var->blue.offset = 0;
1120
var->blue.length = 8;
1121
var->transp.offset = 0;
1122
var->transp.length = 0;
1123
} else if (var->bits_per_pixel <= 32) { /* RGBA 888 */
1124
var->bits_per_pixel = 32;
1125
var->red.offset = 16;
1126
var->red.length = 8;
1127
var->green.offset = 8;
1128
var->green.length = 8;
1129
var->blue.offset = 0;
1130
var->blue.length = 8;
1131
var->transp.offset = 24;
1132
var->transp.length = 8;
1136
var->red.msb_right = 0;
1137
var->green.msb_right = 0;
1138
var->blue.msb_right = 0;
1139
var->transp.msb_right = 0;
1141
/* Make sure we don't exceed our allocated memory. */
1142
if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1146
/* only accept the forced_bpp for dual channel configurations */
1147
if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
1153
static int sh_mobile_set_par(struct fb_info *info)
1155
struct sh_mobile_lcdc_chan *ch = info->par;
1156
u32 line_length = info->fix.line_length;
1159
sh_mobile_lcdc_stop(ch->lcdc);
1161
if (info->var.nonstd)
1162
info->fix.line_length = info->var.xres;
1164
info->fix.line_length = info->var.xres
1165
* info->var.bits_per_pixel / 8;
1167
ret = sh_mobile_lcdc_start(ch->lcdc);
1169
dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
1170
info->fix.line_length = line_length;
1177
* Screen blanking. Behavior is as follows:
1178
* FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1179
* FB_BLANK_NORMAL: screen blanked, clocks enabled
1182
* FB_BLANK_POWEROFF: screen blanked, clocks disabled
1184
static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1186
struct sh_mobile_lcdc_chan *ch = info->par;
1187
struct sh_mobile_lcdc_priv *p = ch->lcdc;
1189
/* blank the screen? */
1190
if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1191
struct fb_fillrect rect = {
1192
.width = info->var.xres,
1193
.height = info->var.yres,
1195
sh_mobile_lcdc_fillrect(info, &rect);
1197
/* turn clocks on? */
1198
if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1199
sh_mobile_lcdc_clk_on(p);
1201
/* turn clocks off? */
1202
if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1203
/* make sure the screen is updated with the black fill before
1204
* switching the clocks off. one vsync is not enough since
1205
* blanking may occur in the middle of a refresh. deferred io
1206
* mode will reenable the clocks and update the screen in time,
1207
* so it does not need this. */
1208
if (!info->fbdefio) {
1209
sh_mobile_wait_for_vsync(info);
1210
sh_mobile_wait_for_vsync(info);
1212
sh_mobile_lcdc_clk_off(p);
1215
ch->blank_status = blank;
1219
static struct fb_ops sh_mobile_lcdc_ops = {
1220
.owner = THIS_MODULE,
1221
.fb_setcolreg = sh_mobile_lcdc_setcolreg,
1222
.fb_read = fb_sys_read,
1223
.fb_write = fb_sys_write,
1224
.fb_fillrect = sh_mobile_lcdc_fillrect,
1225
.fb_copyarea = sh_mobile_lcdc_copyarea,
1226
.fb_imageblit = sh_mobile_lcdc_imageblit,
1227
.fb_blank = sh_mobile_lcdc_blank,
1228
.fb_pan_display = sh_mobile_fb_pan_display,
1229
.fb_ioctl = sh_mobile_ioctl,
1230
.fb_open = sh_mobile_open,
1231
.fb_release = sh_mobile_release,
1232
.fb_check_var = sh_mobile_check_var,
1233
.fb_set_par = sh_mobile_set_par,
1236
static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
1238
struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1239
struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1240
int brightness = bdev->props.brightness;
1242
if (bdev->props.power != FB_BLANK_UNBLANK ||
1243
bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
1246
return cfg->set_brightness(cfg->board_data, brightness);
1249
static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
1251
struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1252
struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1254
return cfg->get_brightness(cfg->board_data);
1257
static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
1258
struct fb_info *info)
1260
return (info->bl_dev == bdev);
1263
static struct backlight_ops sh_mobile_lcdc_bl_ops = {
1264
.options = BL_CORE_SUSPENDRESUME,
1265
.update_status = sh_mobile_lcdc_update_bl,
1266
.get_brightness = sh_mobile_lcdc_get_brightness,
1267
.check_fb = sh_mobile_lcdc_check_fb,
1270
static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
1271
struct sh_mobile_lcdc_chan *ch)
1273
struct backlight_device *bl;
1275
bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch,
1276
&sh_mobile_lcdc_bl_ops, NULL);
1278
dev_err(parent, "unable to register backlight device: %ld\n",
1283
bl->props.max_brightness = ch->cfg.bl_info.max_brightness;
1284
bl->props.brightness = bl->props.max_brightness;
1285
backlight_update_status(bl);
1290
static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
1292
backlight_device_unregister(bdev);
1295
static int sh_mobile_lcdc_suspend(struct device *dev)
1297
struct platform_device *pdev = to_platform_device(dev);
1299
sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1303
static int sh_mobile_lcdc_resume(struct device *dev)
1305
struct platform_device *pdev = to_platform_device(dev);
1307
return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1310
static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1312
struct platform_device *pdev = to_platform_device(dev);
1313
struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1315
/* turn off LCDC hardware */
1316
lcdc_write(priv, _LDCNT1R, 0);
1321
static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1323
struct platform_device *pdev = to_platform_device(dev);
1324
struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1326
__sh_mobile_lcdc_start(priv);
1331
static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1332
.suspend = sh_mobile_lcdc_suspend,
1333
.resume = sh_mobile_lcdc_resume,
1334
.runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1335
.runtime_resume = sh_mobile_lcdc_runtime_resume,
1338
/* locking: called with info->lock held */
1339
static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1340
unsigned long action, void *data)
1342
struct fb_event *event = data;
1343
struct fb_info *info = event->info;
1344
struct sh_mobile_lcdc_chan *ch = info->par;
1345
struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1347
if (&ch->lcdc->notifier != nb)
1350
dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1351
__func__, action, event->data);
1354
case FB_EVENT_SUSPEND:
1355
if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
1356
board_cfg->display_off(board_cfg->board_data);
1357
module_put(board_cfg->owner);
1359
sh_mobile_lcdc_stop(ch->lcdc);
1361
case FB_EVENT_RESUME:
1362
mutex_lock(&ch->open_lock);
1363
sh_mobile_fb_reconfig(info);
1364
mutex_unlock(&ch->open_lock);
1366
/* HDMI must be enabled before LCDC configuration */
1367
if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
1368
board_cfg->display_on(board_cfg->board_data, info);
1369
module_put(board_cfg->owner);
1372
sh_mobile_lcdc_start(ch->lcdc);
1378
static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1380
struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1381
struct fb_info *info;
1384
fb_unregister_client(&priv->notifier);
1386
for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1387
if (priv->ch[i].info && priv->ch[i].info->dev)
1388
unregister_framebuffer(priv->ch[i].info);
1390
sh_mobile_lcdc_stop(priv);
1392
for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1393
info = priv->ch[i].info;
1395
if (!info || !info->device)
1398
if (priv->ch[i].sglist)
1399
vfree(priv->ch[i].sglist);
1401
if (info->screen_base)
1402
dma_free_coherent(&pdev->dev, info->fix.smem_len,
1404
priv->ch[i].dma_handle);
1405
fb_dealloc_cmap(&info->cmap);
1406
framebuffer_release(info);
1409
for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1411
sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
1415
clk_put(priv->dot_clk);
1418
pm_runtime_disable(priv->dev);
1421
iounmap(priv->base);
1424
free_irq(priv->irq, priv);
1429
static int __devinit sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch,
1432
struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1433
const struct fb_videomode *max_mode;
1434
const struct fb_videomode *mode;
1435
struct fb_var_screeninfo *var;
1436
struct fb_info *info;
1437
unsigned int max_size;
1443
mutex_init(&ch->open_lock);
1445
/* Allocate the frame buffer device. */
1446
ch->info = framebuffer_alloc(0, dev);
1448
dev_err(dev, "unable to allocate fb_info\n");
1453
info->fbops = &sh_mobile_lcdc_ops;
1455
info->pseudo_palette = &ch->pseudo_palette;
1456
info->flags = FBINFO_FLAG_DEFAULT;
1458
/* Iterate through the modes to validate them and find the highest
1464
for (i = 0, mode = cfg->lcd_cfg; i < cfg->num_cfg; i++, mode++) {
1465
unsigned int size = mode->yres * mode->xres;
1467
/* NV12 buffers must have even number of lines */
1468
if ((cfg->nonstd) && cfg->bpp == 12 &&
1469
(mode->yres & 0x1)) {
1470
dev_err(dev, "yres must be multiple of 2 for YCbCr420 "
1475
if (size > max_size) {
1482
max_size = MAX_XRES * MAX_YRES;
1484
dev_dbg(dev, "Found largest videomode %ux%u\n",
1485
max_mode->xres, max_mode->yres);
1487
/* Initialize fixed screen information. Restrict pan to 2 lines steps
1490
info->fix = sh_mobile_lcdc_fix;
1491
info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
1492
if (cfg->nonstd && cfg->bpp == 12)
1493
info->fix.ypanstep = 2;
1495
/* Create the mode list. */
1496
if (cfg->lcd_cfg == NULL) {
1497
mode = &default_720p;
1500
mode = cfg->lcd_cfg;
1501
num_cfg = cfg->num_cfg;
1504
fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1506
/* Initialize variable screen information using the first mode as
1507
* default. The default Y virtual resolution is twice the panel size to
1508
* allow for double-buffering.
1511
fb_videomode_to_var(var, mode);
1512
var->bits_per_pixel = cfg->bpp;
1513
var->width = cfg->lcd_size_cfg.width;
1514
var->height = cfg->lcd_size_cfg.height;
1515
var->yres_virtual = var->yres * 2;
1516
var->activate = FB_ACTIVATE_NOW;
1518
ret = sh_mobile_check_var(var, info);
1522
/* Allocate frame buffer memory and color map. */
1523
buf = dma_alloc_coherent(dev, info->fix.smem_len, &ch->dma_handle,
1526
dev_err(dev, "unable to allocate buffer\n");
1530
ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1532
dev_err(dev, "unable to allocate cmap\n");
1533
dma_free_coherent(dev, info->fix.smem_len,
1534
buf, ch->dma_handle);
1538
info->fix.smem_start = ch->dma_handle;
1540
info->fix.line_length = var->xres;
1542
info->fix.line_length = var->xres * (cfg->bpp / 8);
1544
info->screen_base = buf;
1546
ch->display_var = *var;
1551
static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1553
struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1554
struct sh_mobile_lcdc_priv *priv;
1555
struct resource *res;
1561
dev_err(&pdev->dev, "no platform data defined\n");
1565
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1566
i = platform_get_irq(pdev, 0);
1567
if (!res || i < 0) {
1568
dev_err(&pdev->dev, "cannot get platform resources\n");
1572
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1574
dev_err(&pdev->dev, "cannot allocate device data\n");
1578
platform_set_drvdata(pdev, priv);
1580
error = request_irq(i, sh_mobile_lcdc_irq, 0,
1581
dev_name(&pdev->dev), priv);
1583
dev_err(&pdev->dev, "unable to request irq\n");
1588
atomic_set(&priv->hw_usecnt, -1);
1590
for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1591
struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
1594
memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1596
error = sh_mobile_lcdc_check_interface(ch);
1598
dev_err(&pdev->dev, "unsupported interface type\n");
1601
init_waitqueue_head(&ch->frame_end_wait);
1602
init_completion(&ch->vsync_completion);
1605
/* probe the backlight is there is one defined */
1606
if (ch->cfg.bl_info.max_brightness)
1607
ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
1609
switch (pdata->ch[i].chan) {
1610
case LCDC_CHAN_MAINLCD:
1611
ch->enabled = LDCNT2R_ME;
1612
ch->reg_offs = lcdc_offs_mainlcd;
1615
case LCDC_CHAN_SUBLCD:
1616
ch->enabled = LDCNT2R_SE;
1617
ch->reg_offs = lcdc_offs_sublcd;
1623
if (!num_channels) {
1624
dev_err(&pdev->dev, "no channels defined\n");
1629
/* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
1630
if (num_channels == 2)
1631
priv->forced_bpp = pdata->ch[0].bpp;
1633
priv->base = ioremap_nocache(res->start, resource_size(res));
1637
error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1639
dev_err(&pdev->dev, "unable to setup clocks\n");
1643
priv->meram_dev = pdata->meram_dev;
1645
for (i = 0; i < num_channels; i++) {
1646
struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1648
error = sh_mobile_lcdc_channel_init(ch, &pdev->dev);
1653
error = sh_mobile_lcdc_start(priv);
1655
dev_err(&pdev->dev, "unable to start hardware\n");
1659
for (i = 0; i < num_channels; i++) {
1660
struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1661
struct fb_info *info = ch->info;
1663
if (info->fbdefio) {
1664
ch->sglist = vmalloc(sizeof(struct scatterlist) *
1665
info->fix.smem_len >> PAGE_SHIFT);
1667
dev_err(&pdev->dev, "cannot allocate sglist\n");
1672
info->bl_dev = ch->bl;
1674
error = register_framebuffer(info);
1679
"registered %s/%s as %dx%d %dbpp.\n",
1681
(ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1682
"mainlcd" : "sublcd",
1683
info->var.xres, info->var.yres,
1686
/* deferred io mode: disable clock to save power */
1687
if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1688
sh_mobile_lcdc_clk_off(priv);
1691
/* Failure ignored */
1692
priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1693
fb_register_client(&priv->notifier);
1697
sh_mobile_lcdc_remove(pdev);
1702
static struct platform_driver sh_mobile_lcdc_driver = {
1704
.name = "sh_mobile_lcdc_fb",
1705
.owner = THIS_MODULE,
1706
.pm = &sh_mobile_lcdc_dev_pm_ops,
1708
.probe = sh_mobile_lcdc_probe,
1709
.remove = sh_mobile_lcdc_remove,
1712
static int __init sh_mobile_lcdc_init(void)
1714
return platform_driver_register(&sh_mobile_lcdc_driver);
1717
static void __exit sh_mobile_lcdc_exit(void)
1719
platform_driver_unregister(&sh_mobile_lcdc_driver);
1722
module_init(sh_mobile_lcdc_init);
1723
module_exit(sh_mobile_lcdc_exit);
1725
MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1726
MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1727
MODULE_LICENSE("GPL v2");