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path: root/drivers/video/atmel_lcdfb.c
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Diffstat (limited to 'drivers/video/atmel_lcdfb.c')
-rw-r--r--drivers/video/atmel_lcdfb.c117
1 files changed, 71 insertions, 46 deletions
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 5b3a15dffb5f..d38fd5217422 100644
--- a/drivers/video/atmel_lcdfb.c
+++ b/drivers/video/atmel_lcdfb.c
@@ -18,9 +18,9 @@
#include <linux/delay.h>
#include <linux/backlight.h>
-#include <asm/arch/board.h>
-#include <asm/arch/cpu.h>
-#include <asm/arch/gpio.h>
+#include <mach/board.h>
+#include <mach/cpu.h>
+#include <mach/gpio.h>
#include <video/atmel_lcdc.h>
@@ -39,7 +39,9 @@
#endif
#if defined(CONFIG_ARCH_AT91)
-#define ATMEL_LCDFB_FBINFO_DEFAULT FBINFO_DEFAULT
+#define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
+ | FBINFO_PARTIAL_PAN_OK \
+ | FBINFO_HWACCEL_YPAN)
static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
struct fb_var_screeninfo *var)
@@ -177,7 +179,7 @@ static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = {
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.xpanstep = 0,
- .ypanstep = 0,
+ .ypanstep = 1,
.ywrapstep = 0,
.accel = FB_ACCEL_NONE,
};
@@ -206,6 +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)
{
@@ -240,9 +272,11 @@ static int atmel_lcdfb_alloc_video_memory(struct atmel_lcdfb_info *sinfo)
{
struct fb_info *info = sinfo->info;
struct fb_var_screeninfo *var = &info->var;
+ unsigned int smem_len;
- info->fix.smem_len = (var->xres_virtual * var->yres_virtual
- * ((var->bits_per_pixel + 7) / 8));
+ smem_len = (var->xres_virtual * var->yres_virtual
+ * ((var->bits_per_pixel + 7) / 8));
+ info->fix.smem_len = max(smem_len, sinfo->smem_len);
info->screen_base = dma_alloc_writecombine(info->device, info->fix.smem_len,
(dma_addr_t *)&info->fix.smem_start, GFP_KERNEL);
@@ -374,6 +408,10 @@ 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;
@@ -416,26 +454,8 @@ 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);
}
/**
@@ -467,14 +487,7 @@ 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;
@@ -579,13 +592,7 @@ 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");
@@ -794,6 +801,7 @@ static int __init atmel_lcdfb_probe(struct platform_device *pdev)
sinfo->default_monspecs = pdata_sinfo->default_monspecs;
sinfo->atmel_lcdfb_power_control = pdata_sinfo->atmel_lcdfb_power_control;
sinfo->guard_time = pdata_sinfo->guard_time;
+ sinfo->smem_len = pdata_sinfo->smem_len;
sinfo->lcdcon_is_backlight = pdata_sinfo->lcdcon_is_backlight;
sinfo->lcd_wiring_mode = pdata_sinfo->lcd_wiring_mode;
} else {
@@ -934,7 +942,7 @@ static int __init atmel_lcdfb_probe(struct platform_device *pdev)
ret = register_framebuffer(info);
if (ret < 0) {
dev_err(dev, "failed to register framebuffer device: %d\n", ret);
- goto free_cmap;
+ goto reset_drvdata;
}
/* add selected videomode to modelist */
@@ -950,7 +958,8 @@ static int __init atmel_lcdfb_probe(struct platform_device *pdev)
return 0;
-
+reset_drvdata:
+ dev_set_drvdata(dev, NULL);
free_cmap:
fb_dealloc_cmap(&info->cmap);
unregister_irqs:
@@ -987,10 +996,11 @@ static int __exit atmel_lcdfb_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct fb_info *info = dev_get_drvdata(dev);
- struct atmel_lcdfb_info *sinfo = info->par;
+ struct atmel_lcdfb_info *sinfo;
- if (!sinfo)
+ if (!info || !info->par)
return 0;
+ sinfo = info->par;
cancel_work_sync(&sinfo->task);
exit_backlight(sinfo);
@@ -1025,11 +1035,20 @@ 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;
}
@@ -1039,9 +1058,15 @@ 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;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 04:28:00 +0100