This patch is preparation for follow up one to support cases where synchronization can fail.
Suggested-by: Simon Glass sjg@chromium.org Signed-off-by: Michal Simek michal.simek@xilinx.com
---
Changes in v2: - New patch is series
drivers/video/vidconsole-uclass.c | 40 ++++++++++++++++++++++--------- drivers/video/video-uclass.c | 12 +++++++--- include/video.h | 4 +++- 3 files changed, 41 insertions(+), 15 deletions(-)
diff --git a/drivers/video/vidconsole-uclass.c b/drivers/video/vidconsole-uclass.c index 3a07f36ce278..f29c0e58c76d 100644 --- a/drivers/video/vidconsole-uclass.c +++ b/drivers/video/vidconsole-uclass.c @@ -89,9 +89,7 @@ static int vidconsole_back(struct udevice *dev) if (priv->ycur < 0) priv->ycur = 0; } - video_sync(dev->parent, false); - - return 0; + return video_sync(dev->parent, false); }
/* Move to a newline, scrolling the display if necessary */ @@ -101,7 +99,7 @@ static void vidconsole_newline(struct udevice *dev) struct udevice *vid_dev = dev->parent; struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev); const int rows = CONFIG_CONSOLE_SCROLL_LINES; - int i; + int i, ret;
priv->xcur_frac = priv->xstart_frac; priv->ycur += priv->y_charsize; @@ -116,7 +114,12 @@ static void vidconsole_newline(struct udevice *dev) } priv->last_ch = 0;
- video_sync(dev->parent, false); + ret = video_sync(dev->parent, false); + if (ret) { +#ifdef DEBUG + console_puts_select_stderr(true, "[vc err: video_sync]"); +#endif + } }
static const struct vid_rgb colors[VID_COLOR_COUNT] = { @@ -348,8 +351,15 @@ static void vidconsole_escape_char(struct udevice *dev, char ch) parsenum(priv->escape_buf + 1, &mode);
if (mode == 2) { + int ret; + video_clear(dev->parent); - video_sync(dev->parent, false); + ret = video_sync(dev->parent, false); + if (ret) { +#ifdef DEBUG + console_puts_select_stderr(true, "[vc err: video_sync]"); +#endif + } priv->ycur = 0; priv->xcur_frac = priv->xstart_frac; } else { @@ -565,7 +575,12 @@ static void vidconsole_putc(struct stdio_dev *sdev, const char ch) console_puts_select_stderr(true, "[vc err: putc]"); #endif } - video_sync(dev->parent, false); + ret = video_sync(dev->parent, false); + if (ret) { +#ifdef DEBUG + console_puts_select_stderr(true, "[vc err: video_sync]"); +#endif + } }
static void vidconsole_puts(struct stdio_dev *sdev, const char *s) @@ -582,7 +597,12 @@ static void vidconsole_puts(struct stdio_dev *sdev, const char *s) console_puts_select_stderr(true, str); #endif } - video_sync(dev->parent, false); + ret = video_sync(dev->parent, false); + if (ret) { +#ifdef DEBUG + console_puts_select_stderr(true, "[vc err: video_sync]"); +#endif + } }
/* Set up the number of rows and colours (rotated drivers override this) */ @@ -691,9 +711,7 @@ static int do_video_puts(struct cmd_tbl *cmdtp, int flag, int argc, for (s = argv[1]; *s; s++) vidconsole_put_char(dev, *s);
- video_sync(dev->parent, false); - - return 0; + return video_sync(dev->parent, false); }
U_BOOT_CMD( diff --git a/drivers/video/video-uclass.c b/drivers/video/video-uclass.c index 650891e49dd0..6fc412801714 100644 --- a/drivers/video/video-uclass.c +++ b/drivers/video/video-uclass.c @@ -15,6 +15,7 @@ #include <video_console.h> #include <asm/cache.h> #include <dm/lists.h> +#include <dm/device_compat.h> #include <dm/device-internal.h> #include <dm/uclass-internal.h> #ifdef CONFIG_SANDBOX @@ -172,7 +173,7 @@ void video_set_default_colors(struct udevice *dev, bool invert) }
/* Flush video activity to the caches */ -void video_sync(struct udevice *vid, bool force) +int video_sync(struct udevice *vid, bool force) { /* * flush_dcache_range() is declared in common.h but it seems that some @@ -196,17 +197,22 @@ void video_sync(struct udevice *vid, bool force) last_sync = get_timer(0); } #endif + return 0; }
void video_sync_all(void) { struct udevice *dev; + int ret;
for (uclass_find_first_device(UCLASS_VIDEO, &dev); dev; uclass_find_next_device(&dev)) { - if (device_active(dev)) - video_sync(dev, true); + if (device_active(dev)) { + ret = video_sync(dev, true); + if (ret) + dev_dbg(dev, "Video sync failed\n"); + } } }
diff --git a/include/video.h b/include/video.h index 7313b17f7ce8..1bfe6843a805 100644 --- a/include/video.h +++ b/include/video.h @@ -155,11 +155,13 @@ int video_clear(struct udevice *dev); * @force: True to force a sync even if there was one recently (this is * very expensive on sandbox) * + * @return: 0 always + * * Some frame buffers are cached or have a secondary frame buffer. This * function syncs these up so that the current contents of the U-Boot frame * buffer are displayed to the user. */ -void video_sync(struct udevice *vid, bool force); +int video_sync(struct udevice *vid, bool force);
/** * video_sync_all() - Sync all devices' frame buffers with there hardware