Dear Yannick,
Thank you for your patch,
In your patch, you have removed clk_disable() & clk_enable().
Could you please double confirm ?
thanks
Philippe :-)
On 5/10/19 5:03 PM, Yannick Fertré wrote:
> Clk_round_rate returns rounded clock without changing
> the hardware in any way.
> This function couldn't replace set_rate/get_rate calls.
> Todo comment has been removed & a new log inserted.
>
> Signed-off-by: Yannick Fertré <yannick.fertre@xxxxxx>
> ---
> drivers/gpu/drm/stm/ltdc.c | 10 +++-------
> 1 file changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> index 97912e2..2f8aa2e 100644
> --- a/drivers/gpu/drm/stm/ltdc.c
> +++ b/drivers/gpu/drm/stm/ltdc.c
> @@ -507,20 +507,16 @@ static bool ltdc_crtc_mode_fixup(struct drm_crtc *crtc,
> struct ltdc_device *ldev = crtc_to_ltdc(crtc);
> int rate = mode->clock * 1000;
>
> - /*
> - * TODO clk_round_rate() does not work yet. When ready, it can
> - * be used instead of clk_set_rate() then clk_get_rate().
> - */
> -
> - clk_disable(ldev->pixel_clk);
> if (clk_set_rate(ldev->pixel_clk, rate) < 0) {
> DRM_ERROR("Cannot set rate (%dHz) for pixel clk\n", rate);
> return false;
> }
> - clk_enable(ldev->pixel_clk);
>
> adjusted_mode->clock = clk_get_rate(ldev->pixel_clk) / 1000;
>
> + DRM_DEBUG_DRIVER("requested clock %dkHz, adjusted clock %dkHz\n",
> + mode->clock, adjusted_mode->clock);
> +
> return true;
> }
>
>
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