[PATCH] drm/panfrost: devfreq: Round frequencies to OPPs

[Rob Herring]

On Mon, Nov 18, 2019 at 11:30 AM Steven Price <steven.price at arm.com> wrote:
>
> Currently when setting a frequency in panfrost_devfreq_target the
> returned frequency is the actual frequency that the clock driver reports
> (the return of clk_get_rate()). However, where the provided OPPs don't
> precisely match the frequencies that the clock actually achieves devfreq
> will then complain (repeatedly):
>
>   devfreq devfreq0: Couldn't update frequency transition information.
>
> To avoid this change panfrost_devfreq_target() to fetch the opp using
> devfreq_recommened_opp() and not actually query the clock for the
> frequency.
>
> A similar problem exists with panfrost_devfreq_get_cur_freq(), but in
> this case because the function is optional we can just remove it and
> devfreq will fall back to using the previously set frequency.
>
> Fixes: 221bc77914cb ("drm/panfrost: Use generic code for devfreq")
> Signed-off-by: Steven Price <steven.price at arm.com>
> ---
>  drivers/gpu/drm/panfrost/panfrost_devfreq.c | 19 ++++++-------------
>  1 file changed, 6 insertions(+), 13 deletions(-)

Applied.

Rob