On 08/14/2012 01:21 PM, Manjunathappa, Prakash wrote:
> LCD controller on am335x supports 24bpp raster configuration in addition
> to ones on da850. LCDC also supports 24bpp in unpacked format having
> ARGB:8888 32bpp format data in DDR, but it doesn't interpret alpha
> component of the data.
>
> Signed-off-by: Manjunathappa, Prakash <[email protected]>
> Cc: Anatolij Gustschin <[email protected]>
Applied, although I think it shouldn't set var->transp if the
transparency is not used. But as other drivers seem to do the same I
guess both is okay.
Thanks,
Florian Tobias Schandinat
> ---
> Applies on top of fbdev-next of Florian Tobias Schandinat's tree.
> Since v4:
> Re-define CNVT_TOHW macro.
> Since v3:
> Minor nit, declare pseudo_palette as u32 type.
> Since v2:
> Fixed additional configurations for 24bpp support.
> Since v1:
> Simplified calculation of pseudopalette for FB_VISUAL_TRUECOLOR type.
>
> drivers/video/da8xx-fb.c | 132 +++++++++++++++++++++++++++++++++------------
> 1 files changed, 97 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
> index cb696ff..5c6df7b 100644
> --- a/drivers/video/da8xx-fb.c
> +++ b/drivers/video/da8xx-fb.c
> @@ -87,6 +87,8 @@
> #define LCD_V2_LIDD_CLK_EN BIT(1)
> #define LCD_V2_CORE_CLK_EN BIT(0)
> #define LCD_V2_LPP_B10 26
> +#define LCD_V2_TFT_24BPP_MODE BIT(25)
> +#define LCD_V2_TFT_24BPP_UNPACK BIT(26)
>
> /* LCD Raster Timing 2 Register */
> #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
> @@ -157,7 +159,6 @@ struct da8xx_fb_par {
> unsigned int dma_end;
> struct clk *lcdc_clk;
> int irq;
> - unsigned short pseudo_palette[16];
> unsigned int palette_sz;
> unsigned int pxl_clk;
> int blank;
> @@ -176,6 +177,7 @@ struct da8xx_fb_par {
> unsigned int lcd_fck_rate;
> #endif
> void (*panel_power_ctrl)(int);
> + u32 pseudo_palette[16];
> };
>
> /* Variable Screen Information */
> @@ -528,6 +530,9 @@ static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par,
> u32 width, u32 height,
> {
> u32 reg;
>
> + if (bpp > 16 && lcd_revision == LCD_VERSION_1)
> + return -EINVAL;
> +
> /* Set the Panel Width */
> /* Pixels per line = (PPL + 1)*16 */
> if (lcd_revision == LCD_VERSION_1) {
> @@ -571,14 +576,19 @@ static int lcd_cfg_frame_buffer(struct da8xx_fb_par
> *par, u32 width, u32 height,
> reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
> if (raster_order)
> reg |= LCD_RASTER_ORDER;
> - lcdc_write(reg, LCD_RASTER_CTRL_REG);
> +
> + par->palette_sz = 16 * 2;
>
> switch (bpp) {
> case 1:
> case 2:
> case 4:
> case 16:
> - par->palette_sz = 16 * 2;
> + break;
> + case 24:
> + reg |= LCD_V2_TFT_24BPP_MODE;
> + case 32:
> + reg |= LCD_V2_TFT_24BPP_UNPACK;
> break;
>
> case 8:
> @@ -589,9 +599,12 @@ static int lcd_cfg_frame_buffer(struct da8xx_fb_par
> *par, u32 width, u32 height,
> return -EINVAL;
> }
>
> + lcdc_write(reg, LCD_RASTER_CTRL_REG);
> +
> return 0;
> }
>
> +#define CNVT_TOHW(val, width) ((((val) << (width)) + 0x7FFF - (val)) >> 16)
> static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
> unsigned blue, unsigned transp,
> struct fb_info *info)
> @@ -607,13 +620,38 @@ static int fb_setcolreg(unsigned regno, unsigned red,
> unsigned green,
> if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
> return 1;
>
> - if (info->var.bits_per_pixel == 4) {
> - if (regno > 15)
> - return 1;
> + if (info->var.bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
> + return -EINVAL;
>
> - if (info->var.grayscale) {
> - pal = regno;
> - } else {
> + switch (info->fix.visual) {
> + case FB_VISUAL_TRUECOLOR:
> + red = CNVT_TOHW(red, info->var.red.length);
> + green = CNVT_TOHW(green, info->var.green.length);
> + blue = CNVT_TOHW(blue, info->var.blue.length);
> + break;
> + case FB_VISUAL_PSEUDOCOLOR:
> + switch (info->var.bits_per_pixel) {
> + case 4:
> + if (regno > 15)
> + return -EINVAL;
> +
> + if (info->var.grayscale) {
> + pal = regno;
> + } else {
> + red >>= 4;
> + green >>= 8;
> + blue >>= 12;
> +
> + pal = red & 0x0f00;
> + pal |= green & 0x00f0;
> + pal |= blue & 0x000f;
> + }
> + if (regno == 0)
> + pal |= 0x2000;
> + palette[regno] = pal;
> + break;
> +
> + case 8:
> red >>= 4;
> green >>= 8;
> blue >>= 12;
> @@ -621,36 +659,36 @@ static int fb_setcolreg(unsigned regno, unsigned red,
> unsigned green,
> pal = (red & 0x0f00);
> pal |= (green & 0x00f0);
> pal |= (blue & 0x000f);
> - }
> - if (regno == 0)
> - pal |= 0x2000;
> - palette[regno] = pal;
>
> - } else if (info->var.bits_per_pixel == 8) {
> - red >>= 4;
> - green >>= 8;
> - blue >>= 12;
> -
> - pal = (red & 0x0f00);
> - pal |= (green & 0x00f0);
> - pal |= (blue & 0x000f);
> -
> - if (palette[regno] != pal) {
> - update_hw = 1;
> - palette[regno] = pal;
> + if (palette[regno] != pal) {
> + update_hw = 1;
> + palette[regno] = pal;
> + }
> + break;
> }
> - } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
> - red >>= (16 - info->var.red.length);
> - red <<= info->var.red.offset;
> + break;
> + }
>
> - green >>= (16 - info->var.green.length);
> - green <<= info->var.green.offset;
> + /* Truecolor has hardware independent palette */
> + if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
> + u32 v;
>
> - blue >>= (16 - info->var.blue.length);
> - blue <<= info->var.blue.offset;
> + if (regno > 15)
> + return -EINVAL;
>
> - par->pseudo_palette[regno] = red | green | blue;
> + v = (red << info->var.red.offset) |
> + (green << info->var.green.offset) |
> + (blue << info->var.blue.offset);
>
> + switch (info->var.bits_per_pixel) {
> + case 16:
> + ((u16 *) (info->pseudo_palette))[regno] = v;
> + break;
> + case 24:
> + case 32:
> + ((u32 *) (info->pseudo_palette))[regno] = v;
> + break;
> + }
> if (palette[0] != 0x4000) {
> update_hw = 1;
> palette[0] = 0x4000;
> @@ -663,6 +701,7 @@ static int fb_setcolreg(unsigned regno, unsigned red,
> unsigned green,
>
> return 0;
> }
> +#undef CNVT_TOHW
>
> static void lcd_reset(struct da8xx_fb_par *par)
> {
> @@ -871,6 +910,9 @@ static int fb_check_var(struct fb_var_screeninfo *var,
> {
> int err = 0;
>
> + if (var->bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
> + return -EINVAL;
> +
> switch (var->bits_per_pixel) {
> case 1:
> case 8:
> @@ -906,6 +948,26 @@ static int fb_check_var(struct fb_var_screeninfo *var,
> var->transp.length = 0;
> var->nonstd = 0;
> break;
> + case 24:
> + var->red.offset = 16;
> + var->red.length = 8;
> + var->green.offset = 8;
> + var->green.length = 8;
> + var->blue.offset = 0;
> + var->blue.length = 8;
> + var->nonstd = 0;
> + break;
> + case 32:
> + var->transp.offset = 24;
> + var->transp.length = 8;
> + var->red.offset = 16;
> + var->red.length = 8;
> + var->green.offset = 8;
> + var->green.length = 8;
> + var->blue.offset = 0;
> + var->blue.length = 8;
> + var->nonstd = 0;
> + break;
> default:
> err = -EINVAL;
> }
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