drm/fb-helper: atomic pan_display().. (1edf0269) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/gpu/drm/drm_fb_helper.c

+57 −0

Original line number	Diff line number	Diff line
		@@ -1217,6 +1217,57 @@ int drm_fb_helper_set_par(struct fb_info *info)
		}
		EXPORT_SYMBOL(drm_fb_helper_set_par);

		static int pan_display_atomic(struct fb_var_screeninfo *var,
		struct fb_info *info)
		{
		struct drm_fb_helper *fb_helper = info->par;
		struct drm_device *dev = fb_helper->dev;
		struct drm_atomic_state *state;
		int i, ret;

		state = drm_atomic_state_alloc(dev);
		if (!state)
		return -ENOMEM;

		state->acquire_ctx = dev->mode_config.acquire_ctx;
		retry:
		for(i = 0; i < fb_helper->crtc_count; i++) {
		struct drm_mode_set *mode_set;

		mode_set = &fb_helper->crtc_info[i].mode_set;

		mode_set->x = var->xoffset;
		mode_set->y = var->yoffset;

		ret = __drm_atomic_helper_set_config(mode_set, state);
		if (ret != 0)
		goto fail;
		}

		ret = drm_atomic_commit(state);
		if (ret != 0)
		goto fail;

		info->var.xoffset = var->xoffset;
		info->var.yoffset = var->yoffset;

		return 0;

		fail:
		if (ret == -EDEADLK)
		goto backoff;

		drm_atomic_state_free(state);

		return ret;

		backoff:
		drm_atomic_state_clear(state);
		drm_atomic_legacy_backoff(state);

		goto retry;
		}

		/**
		* drm_fb_helper_pan_display - implementation for ->fb_pan_display
		* @var: updated screen information
		@@ -1240,6 +1291,11 @@ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
		return -EBUSY;
		}

		if (fb_helper->atomic) {
		ret = pan_display_atomic(var, info);
		goto unlock;
		}

		for (i = 0; i < fb_helper->crtc_count; i++) {
		modeset = &fb_helper->crtc_info[i].mode_set;

		@@ -1254,6 +1310,7 @@ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
		}
		}
		}
		unlock:
		drm_modeset_unlock_all(dev);
		return ret;
		}