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authorInKi Dae <daeinki@gmail.com>2009-06-16 18:34:27 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-16 22:47:58 -0400
commit39000d654c2a22ca51fe92a39003d5fade59e9e4 (patch)
tree889f8915bb326204d4e7f15fec56b40c371c09c0 /drivers/video/s3c-fb.c
parent97b9a5a28b5fd02ceb3fcccee05e39dd62e4f474 (diff)
Samsung SoC Framebuffer driver: add Alpha Channel support
Add support for the ARGB1888 and ARGB4888 hardware to the Samsung SoC Framebuffer driver (s3c-fb.c). ARGB1888 and ARGB4888 is decided by var->transp.length and this variable is set by s3c_fb_check_var(). In s3c_fb_check_var(), if var->vits_per_pixel is 25 or 28, then var->transp.length would be 1 or 3. Therefore alpha mode(ARGB1888 or ARGB4888) could be decided through that variable. For using alpha mode, you need to set the following: This code should be added to your machine code as platform data. static struct s3c_fb_pd_win xxx_fb_win0 = { /* this is to ensure we use win0 */ .win_mode = { .pixclock = (8+8+8+240)*(38+4+38+400), .left_margin = 8, .right_margin = 8, .upper_margin = 38, .lower_margin = 38, .hsync_len = 8, .vsync_len = 4, .xres = 240, .yres = 400, }, .max_bpp = 32, .default_bpp = 24, }; static struct s3c_fb_pd_win xxx_fb_win1 = { .win_mode = { .pixclock = (8+8+8+240)*(38+4+38+400), .left_margin = 8, .right_margin = 8, .upper_margin = 38, .lower_margin = 38, .hsync_len = 8, .vsync_len = 4, .xres = 240, .yres = 400, }, .max_bpp = 32, .default_bpp = 28, }; static struct s3c_fb_platdata xxx_lcd_pdata __initdata = { .win[0] = &ncp_fb_win0, .win[1] = &ncp_fb_win1, .vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB, .vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC, .setup_gpio = xxx_fb_gpio_setup, }; s3c_fb_set_platdata(&xxx_lcd_pdata); The above code sets pixelformat for window0 layer to RGB888 and window1 layer to ARGB4888. Signed-off-by: InKi Dae <inki.dae@samsung.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Kyungmin Park <kmpark@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/s3c-fb.c')
-rw-r--r--drivers/video/s3c-fb.c31
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
index d3a568e6b169..53bca288e836 100644
--- a/drivers/video/s3c-fb.c
+++ b/drivers/video/s3c-fb.c
@@ -358,9 +358,16 @@ static int s3c_fb_set_par(struct fb_info *info)
358 writel(data, regs + VIDOSD_B(win_no)); 358 writel(data, regs + VIDOSD_B(win_no));
359 359
360 data = var->xres * var->yres; 360 data = var->xres * var->yres;
361
362 u32 osdc_data = 0;
363
364 osdc_data = VIDISD14C_ALPHA1_R(0xf) |
365 VIDISD14C_ALPHA1_G(0xf) |
366 VIDISD14C_ALPHA1_B(0xf);
367
361 if (s3c_fb_has_osd_d(win_no)) { 368 if (s3c_fb_has_osd_d(win_no)) {
362 writel(data, regs + VIDOSD_D(win_no)); 369 writel(data, regs + VIDOSD_D(win_no));
363 writel(0, regs + VIDOSD_C(win_no)); 370 writel(osdc_data, regs + VIDOSD_C(win_no));
364 } else 371 } else
365 writel(data, regs + VIDOSD_C(win_no)); 372 writel(data, regs + VIDOSD_C(win_no));
366 373
@@ -409,8 +416,12 @@ static int s3c_fb_set_par(struct fb_info *info)
409 data |= WINCON1_BPPMODE_19BPP_A1666; 416 data |= WINCON1_BPPMODE_19BPP_A1666;
410 else 417 else
411 data |= WINCON1_BPPMODE_18BPP_666; 418 data |= WINCON1_BPPMODE_18BPP_666;
412 } else if (var->transp.length != 0) 419 } else if (var->transp.length == 1)
413 data |= WINCON1_BPPMODE_25BPP_A1888; 420 data |= WINCON1_BPPMODE_25BPP_A1888
421 | WINCON1_BLD_PIX;
422 else if (var->transp.length == 4)
423 data |= WINCON1_BPPMODE_28BPP_A4888
424 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
414 else 425 else
415 data |= WINCON0_BPPMODE_24BPP_888; 426 data |= WINCON0_BPPMODE_24BPP_888;
416 427
@@ -418,6 +429,20 @@ static int s3c_fb_set_par(struct fb_info *info)
418 break; 429 break;
419 } 430 }
420 431
432 /* It has no color key control register for window0 */
433 if (win_no > 0) {
434 u32 keycon0_data = 0, keycon1_data = 0;
435
436 keycon0_data = ~(WxKEYCON0_KEYBL_EN |
437 WxKEYCON0_KEYEN_F |
438 WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
439
440 keycon1_data = WxKEYCON1_COLVAL(0xffffff);
441
442 writel(keycon0_data, regs + WxKEYCONy(win_no-1, 0));
443 writel(keycon1_data, regs + WxKEYCONy(win_no-1, 1));
444 }
445
421 writel(data, regs + WINCON(win_no)); 446 writel(data, regs + WINCON(win_no));
422 writel(0x0, regs + WINxMAP(win_no)); 447 writel(0x0, regs + WINxMAP(win_no));
423 448