drm/stm: ltdc: remove call of pm-runtime functions

It is not necessary to suspend or stop the ltdc clocks
to modify the pixel clock.

Signed-off-by: Yannick Fertre <yannick.fertre@st.com>
Acked-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200701120402.6444-1-yannick.fertre@st.com

diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index f894968..ef77e14 100644 (file)
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -503,15 +503,7 @@ 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);
@@ -520,14 +512,6 @@ 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);