From a7631c4b9846a433c06422c6cc64a8a5025071a2 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Thu, 30 Nov 2017 14:12:37 +0200 Subject: drm/omap: Filter displays mode based on bandwidth limit If we have memory bandwidth limit configured, reject the modes which would require more bandwidth than the limit if it is used with one full resolution plane (most common use case). This filtering is not providing full protection as it is possible that application would pick smaller crtc resolution with high resolution planes and down scaling, or can enable more smaller planes where the sum of their bandwidth need would be higher than the limit. This patch only allows us to filter out modes which would need more bandwidth if they were used with one full screen plane. Signed-off-by: Peter Ujfalusi Signed-off-by: Tomi Valkeinen --- drivers/gpu/drm/omapdrm/omap_drv.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/gpu/drm/omapdrm/omap_drv.c') diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c index 96857c508ee0..c4bb261dfcd9 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -563,6 +563,11 @@ static int pdev_probe(struct platform_device *pdev) ddev->dev_private = priv; platform_set_drvdata(pdev, ddev); + /* Get memory bandwidth limits */ + if (priv->dispc_ops->get_memory_bandwidth_limit) + priv->max_bandwidth = + priv->dispc_ops->get_memory_bandwidth_limit(); + omap_gem_init(ddev); ret = omap_modeset_init(ddev); -- cgit v1.2.3