mirror of https://gitee.com/openkylin/linux.git
drm/tilcdc: cleanup runtime PM handling
Cleanup runtime PM handling. Before the patch the usage of pm_runtime calls was inconsistent and hard to follow. After the update the pm_runtime calls are removed from set_scanout() and called around major operations that access the HW. After the patch the DPMS code does not have pm_runtime_forbid/allow calls any more and pm_runtime_irq_safe() is not set anymore. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> [Added description to the patch] Signed-off-by: Jyri Sarha <jsarha@ti.com>
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29ddd6e171
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drivers/gpu/drm/tilcdc
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@ -71,7 +71,6 @@ static void set_scanout(struct drm_crtc *crtc, int n)
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struct drm_device *dev = crtc->dev;
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struct tilcdc_drm_private *priv = dev->dev_private;
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pm_runtime_get_sync(dev->dev);
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tilcdc_write(dev, base_reg[n], tilcdc_crtc->start);
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tilcdc_write(dev, ceil_reg[n], tilcdc_crtc->end);
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if (tilcdc_crtc->scanout[n]) {
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@ -81,7 +80,6 @@ static void set_scanout(struct drm_crtc *crtc, int n)
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tilcdc_crtc->scanout[n] = crtc->primary->fb;
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drm_framebuffer_reference(tilcdc_crtc->scanout[n]);
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tilcdc_crtc->dirty &= ~stat[n];
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pm_runtime_put_sync(dev->dev);
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}
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static void update_scanout(struct drm_crtc *crtc)
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@ -186,8 +184,13 @@ static int tilcdc_crtc_page_flip(struct drm_crtc *crtc,
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crtc->primary->fb = fb;
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tilcdc_crtc->event = event;
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pm_runtime_get_sync(dev->dev);
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update_scanout(crtc);
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pm_runtime_put_sync(dev->dev);
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return 0;
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}
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@ -206,10 +209,8 @@ void tilcdc_crtc_dpms(struct drm_crtc *crtc, int mode)
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tilcdc_crtc->dpms = mode;
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pm_runtime_get_sync(dev->dev);
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if (mode == DRM_MODE_DPMS_ON) {
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pm_runtime_forbid(dev->dev);
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pm_runtime_get_sync(dev->dev);
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start(crtc);
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} else {
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tilcdc_crtc->frame_done = false;
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@ -227,10 +228,9 @@ void tilcdc_crtc_dpms(struct drm_crtc *crtc, int mode)
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if (ret == 0)
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dev_err(dev->dev, "timeout waiting for framedone\n");
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}
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pm_runtime_allow(dev->dev);
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}
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pm_runtime_put_sync(dev->dev);
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pm_runtime_put_sync(dev->dev);
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}
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}
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static bool tilcdc_crtc_mode_fixup(struct drm_crtc *crtc,
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@ -455,13 +455,16 @@ static int tilcdc_crtc_mode_set(struct drm_crtc *crtc,
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static int tilcdc_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
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struct drm_framebuffer *old_fb)
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{
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struct drm_device *dev = crtc->dev;
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int r;
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r = tilcdc_verify_fb(crtc, crtc->primary->fb);
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if (r)
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return r;
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pm_runtime_get_sync(dev->dev);
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update_scanout(crtc);
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pm_runtime_put_sync(dev->dev);
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return 0;
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}
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@ -230,7 +230,6 @@ static int tilcdc_load(struct drm_device *dev, unsigned long flags)
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DBG("Maximum Pixel Clock Value %dKHz", priv->max_pixelclock);
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pm_runtime_enable(dev->dev);
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pm_runtime_irq_safe(dev->dev);
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/* Determine LCD IP Version */
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pm_runtime_get_sync(dev->dev);
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