[U-Boot] [PATCH V3 4/4] api: export LCD and video to external apps

[Che-liang Chiou]

Hi Anatolij,

I remove the support of video device from the patch set since I don't
have a board with video output at hand for now. I will leave this to
future work.

Regards,
Che-Liang

On Wed, Oct 19, 2011 at 4:56 PM, Anatolij Gustschin <agust at denx.de> wrote:
> Hi,
>
> On Tue, 18 Oct 2011 17:15:38 +0800
> Che-Liang Chiou <clchiou at chromium.org> wrote:
> ...
>> +int display_get_info(int type, struct display_info *di)
>> +{
>> +#if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
>> +     GraphicDevice *gdev;
>> +#endif
>> +
>> +     switch (type) {
>> +     default:
>> +             debug("%s: unsupport display device type: %d\n",
>> +                             __FILE__, type);
>> +             return API_ENODEV;
>> +
>> +#ifdef CONFIG_LCD
>> +     case DISPLAY_TYPE_LCD:
>> +             di->pixel_width  = panel_info.vl_col;
>> +             di->pixel_height = panel_info.vl_row;
>> +             di->screen_rows = CONSOLE_ROWS;
>> +             di->screen_cols = CONSOLE_COLS;
>> +             break;
>> +#endif
>> +
>> +#if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
>> +     case DISPLAY_TYPE_VIDEO:
>> +             gdev = video_devinfo();
>> +             di->pixel_width  = gdev->winSizeX;
>> +             di->pixel_height = gdev->winSizeY;
>> +             di->screen_rows = CONSOLE_ROWS;
>> +             di->screen_cols = CONSOLE_COLS;
>
> the return value of video_devinfo() should be checked before
> dereferencing gdev pointer (it could be NULL).
>
> Another issue is that CONSOLE_ROWS and CONSOLE_COLS macros
> expand to 'panel_info' structure usage here which is only
> okay for CONFIG_LCD case. For CONFIG_VIDEO case these
> macros are defined in cfb_console.c file and thus can not
> be used here as you currently do (compile breakage again).
>
> ...
>> +
>> +void display_clear(void)
>> +{
>> +#ifdef CONFIG_LCD
>> +     lcd_clear();
>> +#endif
>> +#if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
>> +     video_clear();
>
> video_clear() is used here but it is not defined. Below is
> a small patch included. It shows how video_clear() could look
> like (but this was not tested yet).
>
> Anatolij
>
> diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
> index 4e653b8..5336937 100644
> --- a/drivers/video/cfb_console.c
> +++ b/drivers/video/cfb_console.c
> @@ -1753,6 +1753,23 @@ static int video_init(void)
>        return 0;
>  }
>
> +void video_clear(void)
> +{
> +#ifdef VIDEO_HW_RECTFILL
> +       video_hw_rectfill(VIDEO_PIXEL_SIZE,     /* bytes per pixel */
> +                         0,                    /* dest pos x */
> +                         0,                    /* dest pos y */
> +                         VIDEO_VISIBLE_COLS,   /* frame width */
> +                         VIDEO_VISIBLE_ROWS,   /* frame height */
> +                         CONSOLE_BG_COL        /* fill color */
> +               );
> +#else
> +       memsetl(CONSOLE_ROW_FIRST, CONSOLE_SIZE >> 2, CONSOLE_BG_COL);
> +#endif
> +       console_col = 0;
> +       console_row = 0;
> +}
> +
>  /*
>  * Implement a weak default function for boards that optionally
>  * need to skip the video initialization.
>