On 7/1/20 2:04 PM, Yannick Fertre wrote:
> It is not necessary to suspend or stop the ltdc clocks
> to modify the pixel clock.
> 
> Signed-off-by: Yannick Fertre <yannick.fer...@st.com>
> ---
>   drivers/gpu/drm/stm/ltdc.c | 16 ----------------
>   1 file changed, 16 deletions(-)
> 
> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> index 3f590d916e91..6e28f707092f 100644
> --- a/drivers/gpu/drm/stm/ltdc.c
> +++ b/drivers/gpu/drm/stm/ltdc.c
> @@ -506,15 +506,7 @@ static bool ltdc_crtc_mode_fixup(struct drm_crtc *crtc,
>                                struct drm_display_mode *adjusted_mode)
>   {
>       struct ltdc_device *ldev = crtc_to_ltdc(crtc);
> -     struct drm_device *ddev = crtc->dev;
>       int rate = mode->clock * 1000;
> -     bool runtime_active;
> -     int ret;
> -
> -     runtime_active = pm_runtime_active(ddev->dev);
> -
> -     if (runtime_active)
> -             pm_runtime_put_sync(ddev->dev);
>   
>       if (clk_set_rate(ldev->pixel_clk, rate) < 0) {
>               DRM_ERROR("Cannot set rate (%dHz) for pixel clk\n", rate);
> @@ -523,14 +515,6 @@ static bool ltdc_crtc_mode_fixup(struct drm_crtc *crtc,
>   
>       adjusted_mode->clock = clk_get_rate(ldev->pixel_clk) / 1000;
>   
> -     if (runtime_active) {
> -             ret = pm_runtime_get_sync(ddev->dev);
> -             if (ret) {
> -                     DRM_ERROR("Failed to fixup mode, cannot get sync\n");
> -                     return false;
> -             }
> -     }
> -
>       DRM_DEBUG_DRIVER("requested clock %dkHz, adjusted clock %dkHz\n",
>                        mode->clock, adjusted_mode->clock);
>   
> 
Hi Yannick,
Many thanks for your patch,
Acked-by: Philippe Cornu <philippe.co...@st.com>
Philippe :-)
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