[PATCH v2] drm/dbi: Print errors for mipi_dbi_command()

[Sam Ravnborg]

On Fri, Jul 02, 2021 at 12:04:55PM +0200, Linus Walleij wrote:
> The macro mipi_dbi_command() does not report errors unless you wrap it
> in another macro to do the error reporting.
> 
> Report a rate-limited error so we know what is going on.
> 
> Drop the only user in DRM using mipi_dbi_command() and actually checking
> the error explicitly, let it use mipi_dbi_command_buf() directly
> instead.
> 
> After this any code wishing to send command arrays can rely on
> mipi_dbi_command() providing an appropriate error message if something
> goes wrong.
> 
> Suggested-by: Noralf Trønnes <noralf at tronnes.org>
> Suggested-by: Douglas Anderson <dianders at chromium.org>
> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
Signed-off-by: Sam Ravnborg <sam at ravnborg.org>