[PATCH 2/3] log: use debug uart to output trace before LOG init

[Simon Glass <sjg@chromium.org>]

+Heinrich Schuchardt

On Fri, 6 Nov 2020 at 10:55, Patrick Delaunay <patrick.delaunay@st.com> wrote:
>
> Use the debug uart functions to output the traces before
> the log initialization (when CONFIG_LOG is not activated)
> as it is done in puts/putc function in console.c.
>
> This patch allows to display the first U-Boot traces
> (with macro debug) when CONFIG_DEBUG_UART is activated
> and not only drop them.
>
> For example for traces in board_f.c requested by the macro debug,
> when LOG_DEBUG is defined and CONFIG_LOG is activated.
>
> Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
> ---
>
>  common/log.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)

Reviewed-by: Simon Glass <sjg@chromium.org>

Again this needs a sandbox test

>
> diff --git a/common/log.c b/common/log.c
> index aadf533fb2..aa5505943f 100644
> --- a/common/log.c
> +++ b/common/log.c
> @@ -7,6 +7,7 @@
>   */
>
>  #include <common.h>
> +#include <debug_uart.h>
>  #include <log.h>
>  #include <malloc.h>
>  #include <dm/uclass.h>
> @@ -245,6 +246,16 @@ int _log(enum log_category_t cat, enum log_level_t level, const char *file,
>
>         if (!(gd->flags & GD_FLG_LOG_READY)) {
>                 gd->log_drop_count++;
> +
> +               /* manage droppped trace at default level with debug uart */

dropped


> +               if (IS_ENABLED(CONFIG_DEBUG_UART) &&
> +                   (rec.level <= CONFIG_LOG_DEFAULT_LEVEL || rec.force_debug)) {
> +                       va_start(args, fmt);
> +                       vsnprintf(buf, sizeof(buf), fmt, args);
> +                       printascii(buf);
> +                       va_end(args);
> +               }
> +
>                 return -ENOSYS;
>         }
>         va_start(args, fmt);
> --
> 2.17.1
>