diff options
Diffstat (limited to 'drivers/video/atmel_lcdfb.c')
| -rw-r--r-- | drivers/video/atmel_lcdfb.c | 95 |
1 files changed, 60 insertions, 35 deletions
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c index 5a24c6411d34..f8d0a57a07cb 100644 --- a/drivers/video/atmel_lcdfb.c +++ b/drivers/video/atmel_lcdfb.c @@ -208,6 +208,36 @@ static unsigned long compute_hozval(unsigned long xres, unsigned long lcdcon2) return value; } +static void atmel_lcdfb_stop_nowait(struct atmel_lcdfb_info *sinfo) +{ + /* Turn off the LCD controller and the DMA controller */ + lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, + sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET); + + /* Wait for the LCDC core to become idle */ + while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY) + msleep(10); + + lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0); +} + +static void atmel_lcdfb_stop(struct atmel_lcdfb_info *sinfo) +{ + atmel_lcdfb_stop_nowait(sinfo); + + /* Wait for DMA engine to become idle... */ + while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY) + msleep(10); +} + +static void atmel_lcdfb_start(struct atmel_lcdfb_info *sinfo) +{ + lcdc_writel(sinfo, ATMEL_LCDC_DMACON, sinfo->default_dmacon); + lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, + (sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET) + | ATMEL_LCDC_PWR); +} + static void atmel_lcdfb_update_dma(struct fb_info *info, struct fb_var_screeninfo *var) { @@ -342,6 +372,13 @@ static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var, var->transp.offset = var->transp.length = 0; var->xoffset = var->yoffset = 0; + if (info->fix.smem_len) { + unsigned int smem_len = (var->xres_virtual * var->yres_virtual + * ((var->bits_per_pixel + 7) / 8)); + if (smem_len > info->fix.smem_len) + return -EINVAL; + } + /* Saturate vertical and horizontal timings at maximum values */ var->vsync_len = min_t(u32, var->vsync_len, (ATMEL_LCDC_VPW >> ATMEL_LCDC_VPW_OFFSET) + 1); @@ -378,6 +415,10 @@ static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var, var->red.offset = 11; var->blue.offset = 0; var->green.length = 6; + } else if (sinfo->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB555) { + var->red.offset = 10; + var->blue.offset = 0; + var->green.length = 5; } else { /* BGR:555 mode */ var->red.offset = 0; @@ -420,26 +461,8 @@ static void atmel_lcdfb_reset(struct atmel_lcdfb_info *sinfo) { might_sleep(); - /* LCD power off */ - lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET); - - /* wait for the LCDC core to become idle */ - while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY) - msleep(10); - - /* DMA disable */ - lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0); - - /* wait for DMA engine to become idle */ - while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY) - msleep(10); - - /* LCD power on */ - lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, - (sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET) | ATMEL_LCDC_PWR); - - /* DMA enable */ - lcdc_writel(sinfo, ATMEL_LCDC_DMACON, sinfo->default_dmacon); + atmel_lcdfb_stop(sinfo); + atmel_lcdfb_start(sinfo); } /** @@ -471,14 +494,7 @@ static int atmel_lcdfb_set_par(struct fb_info *info) info->var.xres, info->var.yres, info->var.xres_virtual, info->var.yres_virtual); - /* Turn off the LCD controller and the DMA controller */ - lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET); - - /* Wait for the LCDC core to become idle */ - while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY) - msleep(10); - - lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0); + atmel_lcdfb_stop_nowait(sinfo); if (info->var.bits_per_pixel == 1) info->fix.visual = FB_VISUAL_MONO01; @@ -583,13 +599,7 @@ static int atmel_lcdfb_set_par(struct fb_info *info) while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY) msleep(10); - dev_dbg(info->device, " * re-enable DMA engine\n"); - /* ...and enable it with updated configuration */ - lcdc_writel(sinfo, ATMEL_LCDC_DMACON, sinfo->default_dmacon); - - dev_dbg(info->device, " * re-enable LCDC core\n"); - lcdc_writel(sinfo, ATMEL_LCDC_PWRCON, - (sinfo->guard_time << ATMEL_LCDC_GUARDT_OFFSET) | ATMEL_LCDC_PWR); + atmel_lcdfb_start(sinfo); dev_dbg(info->device, " * DONE\n"); @@ -1032,11 +1042,20 @@ static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg) struct fb_info *info = platform_get_drvdata(pdev); struct atmel_lcdfb_info *sinfo = info->par; + /* + * We don't want to handle interrupts while the clock is + * stopped. It may take forever. + */ + lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL); + sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL); lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0); if (sinfo->atmel_lcdfb_power_control) sinfo->atmel_lcdfb_power_control(0); + + atmel_lcdfb_stop(sinfo); atmel_lcdfb_stop_clock(sinfo); + return 0; } @@ -1046,9 +1065,15 @@ static int atmel_lcdfb_resume(struct platform_device *pdev) struct atmel_lcdfb_info *sinfo = info->par; atmel_lcdfb_start_clock(sinfo); + atmel_lcdfb_start(sinfo); if (sinfo->atmel_lcdfb_power_control) sinfo->atmel_lcdfb_power_control(1); lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon); + + /* Enable FIFO & DMA errors */ + lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI + | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI); + return 0; } |