From a69c05eb7fb4035e9c5e9d973cac2be69fe94b6e Mon Sep 17 00:00:00 2001 From: Lukas Wunner Date: Sun, 19 Apr 2015 17:18:01 +0200 Subject: [PATCH] drm/nouveau: Pause between setting gpu to D3hot and cutting the power On the MacBook Pro, power of the gpu is cut by a gmux chip. Sometimes the gpu gets stuck in powersaving mode and refuses to wake up ("Refused to change power state, currently in D3"). Inserting a delay between setting the gpu to D3hot and cutting the power seems to help (most of the time). This issue and its (partial) remediation by the patch was observed with an Nvidia GT650M (NVE7 / GK107). Signed-off-by: Lukas Wunner Signed-off-by: Dave Airlie --- drivers/gpu/drm/nouveau/nouveau_drm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 89049335b7383..649024d4daf1d 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -23,6 +23,7 @@ */ #include +#include #include #include #include @@ -666,6 +667,7 @@ nouveau_pmops_suspend(struct device *dev) pci_save_state(pdev); pci_disable_device(pdev); pci_set_power_state(pdev, PCI_D3hot); + udelay(200); return 0; } -- 2.39.5