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>
This commit is contained in:
Sudhakar Rajashekhara
Linus Torvalds
Родитель
4ed824d9ae
Коммит
2f93e8f482
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@ -107,7 +107,6 @@ static inline void lcdc_write(unsigned int val, unsigned int addr)
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}
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struct da8xx_fb_par {
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wait_queue_head_t da8xx_wq;
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resource_size_t p_palette_base;
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unsigned char *v_palette_base;
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struct clk *lcdc_clk;
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@ -158,6 +157,7 @@ struct da8xx_panel {
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int vbp; /* Vertical back porch */
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int vsw; /* Vertical Sync Pulse Width */
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int pxl_clk; /* Pixel clock */
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unsigned char invert_pxl_clk; /* Invert Pixel clock */
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};
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static struct da8xx_panel known_lcd_panels[] = {
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@ -173,6 +173,7 @@ static struct da8xx_panel known_lcd_panels[] = {
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.vbp = 2,
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.vsw = 0,
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.pxl_clk = 0x10,
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.invert_pxl_clk = 1,
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},
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/* Sharp LK043T1DG01 */
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[1] = {
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@ -186,29 +187,18 @@ static struct da8xx_panel known_lcd_panels[] = {
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.vbp = 2,
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.vsw = 10,
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.pxl_clk = 0x12,
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.invert_pxl_clk = 0,
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},
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};
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/* Disable the Raster Engine of the LCD Controller */
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static int lcd_disable_raster(struct da8xx_fb_par *par)
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static void lcd_disable_raster(struct da8xx_fb_par *par)
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{
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int ret = 0;
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u32 reg;
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reg = lcdc_read(LCD_RASTER_CTRL_REG);
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if (reg & LCD_RASTER_ENABLE) {
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if (reg & LCD_RASTER_ENABLE)
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lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
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ret = wait_event_interruptible_timeout(par->da8xx_wq,
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!lcdc_read(LCD_STAT_REG) &
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LCD_END_OF_FRAME0, WSI_TIMEOUT);
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}
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if (ret < 0)
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return ret;
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if (ret == 0)
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return -ETIMEDOUT;
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return 0;
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}
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static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
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@ -256,7 +246,7 @@ static int lcd_cfg_dma(int burst_size)
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default:
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return -EINVAL;
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}
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lcdc_write(reg | LCD_END_OF_FRAME_INT_ENA, LCD_DMA_CTRL_REG);
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lcdc_write(reg, LCD_DMA_CTRL_REG);
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return 0;
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}
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@ -342,11 +332,6 @@ static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
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else
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reg &= ~LCD_SYNC_EDGE;
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if (cfg->invert_pxl_clock)
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reg |= LCD_INVERT_PIXEL_CLOCK;
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else
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reg &= ~LCD_INVERT_PIXEL_CLOCK;
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if (cfg->invert_line_clock)
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reg |= LCD_INVERT_LINE_CLOCK;
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else
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@ -456,19 +441,15 @@ static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
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return 0;
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}
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static int lcd_reset(struct da8xx_fb_par *par)
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static void lcd_reset(struct da8xx_fb_par *par)
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{
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int ret = 0;
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/* Disable the Raster if previously Enabled */
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if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE)
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ret = lcd_disable_raster(par);
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lcd_disable_raster(par);
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/* DMA has to be disabled */
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lcdc_write(0, LCD_DMA_CTRL_REG);
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lcdc_write(0, LCD_RASTER_CTRL_REG);
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return ret;
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}
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static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
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@ -477,14 +458,19 @@ static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
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u32 bpp;
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int ret = 0;
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ret = lcd_reset(par);
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if (ret != 0)
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return ret;
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lcd_reset(par);
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/* Configure the LCD clock divisor. */
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lcdc_write(LCD_CLK_DIVISOR(panel->pxl_clk) |
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(LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
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if (panel->invert_pxl_clk)
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lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
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LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
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else
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lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
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~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
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/* Configure the DMA burst size. */
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ret = lcd_cfg_dma(cfg->dma_burst_sz);
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if (ret < 0)
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@ -528,7 +514,6 @@ static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
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static irqreturn_t lcdc_irq_handler(int irq, void *arg)
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{
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u32 stat = lcdc_read(LCD_STAT_REG);
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struct da8xx_fb_par *par = arg;
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u32 reg;
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if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
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@ -539,7 +524,6 @@ static irqreturn_t lcdc_irq_handler(int irq, void *arg)
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} else
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lcdc_write(stat, LCD_STAT_REG);
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wake_up_interruptible(&par->da8xx_wq);
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return IRQ_HANDLED;
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}
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@ -594,13 +578,12 @@ static int fb_check_var(struct fb_var_screeninfo *var,
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static int __devexit fb_remove(struct platform_device *dev)
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{
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struct fb_info *info = dev_get_drvdata(&dev->dev);
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int ret = 0;
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if (info) {
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struct da8xx_fb_par *par = info->par;
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if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE)
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ret = lcd_disable_raster(par);
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lcd_disable_raster(par);
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lcdc_write(0, LCD_RASTER_CTRL_REG);
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/* disable DMA */
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@ -619,7 +602,7 @@ static int __devexit fb_remove(struct platform_device *dev)
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release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
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}
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return ret;
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return 0;
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}
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static int fb_ioctl(struct fb_info *info, unsigned int cmd,
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@ -634,11 +617,11 @@ static int fb_ioctl(struct fb_info *info, unsigned int cmd,
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case FBIPUT_BRIGHTNESS:
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case FBIGET_COLOR:
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case FBIPUT_COLOR:
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return -EINVAL;
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return -ENOTTY;
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case FBIPUT_HSYNC:
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if (copy_from_user(&sync_arg, (char *)arg,
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sizeof(struct lcd_sync_arg)))
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return -EINVAL;
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return -EFAULT;
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lcd_cfg_horizontal_sync(sync_arg.back_porch,
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sync_arg.pulse_width,
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sync_arg.front_porch);
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@ -646,7 +629,7 @@ static int fb_ioctl(struct fb_info *info, unsigned int cmd,
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case FBIPUT_VSYNC:
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if (copy_from_user(&sync_arg, (char *)arg,
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sizeof(struct lcd_sync_arg)))
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return -EINVAL;
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return -EFAULT;
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lcd_cfg_vertical_sync(sync_arg.back_porch,
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sync_arg.pulse_width,
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sync_arg.front_porch);
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@ -773,8 +756,6 @@ static int __init fb_probe(struct platform_device *device)
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par->lcdc_clk = fb_clk;
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init_waitqueue_head(&par->da8xx_wq);
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par->irq = platform_get_irq(device, 0);
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if (par->irq < 0) {
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ret = -ENOENT;
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@ -67,9 +67,6 @@ struct lcd_ctrl_config {
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/* Mono 8-bit Mode: 1=D0-D7 or 0=D0-D3 */
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unsigned char mono_8bit_mode;
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/* Invert pixel clock */
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unsigned char invert_pxl_clock;
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/* Invert line clock */
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unsigned char invert_line_clock;
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