davinci-fb-frame-buffer-driver-for-ti-da8xx-omap-l1xx-v4

Since the previous version, return values in ioctl() function have been
modified.

[akpm@linux-foundation.org: simplify lcd_disable_raster()]
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Pavel Kiryukhin <pkiryukhin@ru.mvista.com>
Signed-off-by: Steve Chen <schen@mvista.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 21 insertions, 40 deletions

diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index e0bbc66499c8..42e1005e2916 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -107,7 +107,6 @@ static inline void lcdc_write(unsigned int val, unsigned int addr)
 }
 
 struct da8xx_fb_par {
-        wait_queue_head_t da8xx_wq;
         resource_size_t p_palette_base;
         unsigned char *v_palette_base;
         struct clk *lcdc_clk;
@@ -158,6 +157,7 @@ struct da8xx_panel {
         int             vbp;            /* Vertical back porch */
         int             vsw;            /* Vertical Sync Pulse Width */
         int             pxl_clk;        /* Pixel clock */
+        unsigned char   invert_pxl_clk; /* Invert Pixel clock */
 };
 
 static struct da8xx_panel known_lcd_panels[] = {
@@ -173,6 +173,7 @@ static struct da8xx_panel known_lcd_panels[] = {
                 .vbp = 2,
                 .vsw = 0,
                 .pxl_clk = 0x10,
+                .invert_pxl_clk = 1,
         },
         /* Sharp LK043T1DG01 */
         [1] = {
@@ -186,29 +187,18 @@ static struct da8xx_panel known_lcd_panels[] = {
                 .vbp = 2,
                 .vsw = 10,
                 .pxl_clk = 0x12,
+                .invert_pxl_clk = 0,
         },
 };
 
 /* Disable the Raster Engine of the LCD Controller */
-static int lcd_disable_raster(struct da8xx_fb_par *par)
+static void lcd_disable_raster(struct da8xx_fb_par *par)
 {
-        int ret = 0;
         u32 reg;
 
         reg = lcdc_read(LCD_RASTER_CTRL_REG);
-        if (reg & LCD_RASTER_ENABLE) {
+        if (reg & LCD_RASTER_ENABLE)
                 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
-                ret = wait_event_interruptible_timeout(par->da8xx_wq,
-                                                !lcdc_read(LCD_STAT_REG) &
-                                                LCD_END_OF_FRAME0, WSI_TIMEOUT);
-        }
-
-        if (ret < 0)
-                return ret;
-        if (ret == 0)
-                return -ETIMEDOUT;
-
-        return 0;
 }
 
 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
@@ -256,7 +246,7 @@ static int lcd_cfg_dma(int burst_size)
         default:
                 return -EINVAL;
         }
-        lcdc_write(reg | LCD_END_OF_FRAME_INT_ENA, LCD_DMA_CTRL_REG);
+        lcdc_write(reg, LCD_DMA_CTRL_REG);
 
         return 0;
 }
@@ -342,11 +332,6 @@ static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
         else
                 reg &= ~LCD_SYNC_EDGE;
 
-        if (cfg->invert_pxl_clock)
-                reg |= LCD_INVERT_PIXEL_CLOCK;
-        else
-                reg &= ~LCD_INVERT_PIXEL_CLOCK;
-
         if (cfg->invert_line_clock)
                 reg |= LCD_INVERT_LINE_CLOCK;
         else
@@ -456,19 +441,15 @@ static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
         return 0;
 }
 
-static int lcd_reset(struct da8xx_fb_par *par)
+static void lcd_reset(struct da8xx_fb_par *par)
 {
-        int ret = 0;
-
         /* Disable the Raster if previously Enabled */
         if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE)
-                ret = lcd_disable_raster(par);
+                lcd_disable_raster(par);
 
         /* DMA has to be disabled */
         lcdc_write(0, LCD_DMA_CTRL_REG);
         lcdc_write(0, LCD_RASTER_CTRL_REG);
-
-        return ret;
 }
 
 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
@@ -477,14 +458,19 @@ static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
         u32 bpp;
         int ret = 0;
 
-        ret = lcd_reset(par);
-        if (ret != 0)
-                return ret;
+        lcd_reset(par);
 
         /* Configure the LCD clock divisor. */
         lcdc_write(LCD_CLK_DIVISOR(panel->pxl_clk) |
                         (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
 
+        if (panel->invert_pxl_clk)
+                lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
+                        LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
+        else
+                lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
+                        ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
+
         /* Configure the DMA burst size. */
         ret = lcd_cfg_dma(cfg->dma_burst_sz);
         if (ret < 0)
@@ -528,7 +514,6 @@ static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
 static irqreturn_t lcdc_irq_handler(int irq, void *arg)
 {
         u32 stat = lcdc_read(LCD_STAT_REG);
-        struct da8xx_fb_par *par = arg;
         u32 reg;
 
         if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
@@ -539,7 +524,6 @@ static irqreturn_t lcdc_irq_handler(int irq, void *arg)
         } else
                 lcdc_write(stat, LCD_STAT_REG);
 
-        wake_up_interruptible(&par->da8xx_wq);
         return IRQ_HANDLED;
 }
 
@@ -594,13 +578,12 @@ static int fb_check_var(struct fb_var_screeninfo *var,
 static int __devexit fb_remove(struct platform_device *dev)
 {
         struct fb_info *info = dev_get_drvdata(&dev->dev);
-        int ret = 0;
 
         if (info) {
                 struct da8xx_fb_par *par = info->par;
 
                 if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE)
-                        ret = lcd_disable_raster(par);
+                        lcd_disable_raster(par);
                 lcdc_write(0, LCD_RASTER_CTRL_REG);
 
                 /* disable DMA  */
@@ -619,7 +602,7 @@ static int __devexit fb_remove(struct platform_device *dev)
                 release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
 
         }
-        return ret;
+        return 0;
 }
 
 static int fb_ioctl(struct fb_info *info, unsigned int cmd,
@@ -634,11 +617,11 @@ static int fb_ioctl(struct fb_info *info, unsigned int cmd,
         case FBIPUT_BRIGHTNESS:
         case FBIGET_COLOR:
         case FBIPUT_COLOR:
-                return -EINVAL;
+                return -ENOTTY;
         case FBIPUT_HSYNC:
                 if (copy_from_user(&sync_arg, (char *)arg,
                                 sizeof(struct lcd_sync_arg)))
-                        return -EINVAL;
+                        return -EFAULT;
                 lcd_cfg_horizontal_sync(sync_arg.back_porch,
                                         sync_arg.pulse_width,
                                         sync_arg.front_porch);
@@ -646,7 +629,7 @@ static int fb_ioctl(struct fb_info *info, unsigned int cmd,
         case FBIPUT_VSYNC:
                 if (copy_from_user(&sync_arg, (char *)arg,
                                 sizeof(struct lcd_sync_arg)))
-                        return -EINVAL;
+                        return -EFAULT;
                 lcd_cfg_vertical_sync(sync_arg.back_porch,
                                         sync_arg.pulse_width,
                                         sync_arg.front_porch);
@@ -773,8 +756,6 @@ static int __init fb_probe(struct platform_device *device)
 
         par->lcdc_clk = fb_clk;
 
-        init_waitqueue_head(&par->da8xx_wq);
-
         par->irq = platform_get_irq(device, 0);
         if (par->irq < 0) {
                 ret = -ENOENT;