On Fri, Nov 01, 2013 at 08:41:26AM -0700, Jesse Barnes wrote: > In some cases we may need to turn off more pipes than just the ones > affected by a connector or encoder change, probably due to modifying > some global resource that requires all pipes to shut down. Add a hook > for this purpose to allow platform code to adjust the prepare_pipes > mask, which allows otherwise active pipes to get shut down for the > duration of the mode set, then restored at the end. > > Signed-off-by: Jesse Barnes <[email protected]> > --- > drivers/gpu/drm/i915/i915_drv.h | 12 ++++++++++++ > drivers/gpu/drm/i915/intel_display.c | 7 +++++++ > 2 files changed, 19 insertions(+) > > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h > index 5edf9bb..7530cd4 100644 > --- a/drivers/gpu/drm/i915/i915_drv.h > +++ b/drivers/gpu/drm/i915/i915_drv.h > @@ -380,6 +380,18 @@ struct drm_i915_display_funcs { > struct drm_crtc *crtc, > uint32_t sprite_width, int pixel_size, > bool enable, bool scaled); > + /** > + * modeset_global_pipes - figure out which pipes need to be disabled > + * @dev: drm device > + * @prepare_pipes: bitmask of pipes to disable > + * > + * In some cases, adjusting a global resource may require shutting > + * down seemingly unrelated pipes on a mode set. This function > + * should determine that and adjust the prepare_pipes bitmask > + * as needed. > + */ > + void (*modeset_global_pipes)(struct drm_device *dev, > + unsigned *prepare_pipes); > void (*modeset_global_resources)(struct drm_device *dev); > /* Returns the active state of the crtc, and if the crtc is active, > * fills out the pipe-config with the hw state. */ > diff --git a/drivers/gpu/drm/i915/intel_display.c > b/drivers/gpu/drm/i915/intel_display.c > index 606a594..faa7548 100644 > --- a/drivers/gpu/drm/i915/intel_display.c > +++ b/drivers/gpu/drm/i915/intel_display.c > @@ -9298,6 +9298,13 @@ static int __intel_set_mode(struct drm_crtc *crtc, > intel_modeset_affected_pipes(crtc, &modeset_pipes, > &prepare_pipes, &disable_pipes); > > + /* > + * See if the config requires any additional preparation, e.g. > + * to adjust global state with pipes off. > + */ > + if (dev_priv->display.modeset_global_pipes) > + dev_priv->display.modeset_global_pipes(dev, &prepare_pipes);
tbh I'd have just added a small callback here - as long as all the global modeset config stuff is still in flux I wouldn't bother with fancy-looking callbacks which we need to change later on anyway. And avoiding the vfunc helps with following the code a bit ... -Daniel > + > *saved_hwmode = crtc->hwmode; > *saved_mode = crtc->mode; > > -- > 1.8.3.1 > > _______________________________________________ > Intel-gfx mailing list > [email protected] > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
