From 8483d152db61c5baf5452b844ef65b96ee9a6cfb Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Mon, 21 Dec 2015 16:11:44 -0800 Subject: [PATCH] drm/vc4: Remove broken attempt at GPU reset using genpd. I've tested and confirmed that it doesn't actually work. We'll need to sort out how to do this properly later, but for now just remove it since it also caused build breakage due to using CONFIG_PM_SLEEP functions without our Kconfig depending on PM_SLEEP. Signed-off-by: Eric Anholt Acked-by: Sudip Mukherjee --- drivers/gpu/drm/vc4/vc4_v3d.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c index 424d515ffcda..314ff71db978 100644 --- a/drivers/gpu/drm/vc4/vc4_v3d.c +++ b/drivers/gpu/drm/vc4/vc4_v3d.c @@ -144,19 +144,16 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused) } #endif /* CONFIG_DEBUG_FS */ -/* - * Asks the firmware to turn on power to the V3D engine. - * - * This may be doable with just the clocks interface, though this - * packet does some other register setup from the firmware, too. - */ int vc4_v3d_set_power(struct vc4_dev *vc4, bool on) { - if (on) - return pm_generic_poweroff(&vc4->v3d->pdev->dev); - else - return pm_generic_resume(&vc4->v3d->pdev->dev); + /* XXX: This interface is needed for GPU reset, and the way to + * do it is to turn our power domain off and back on. We + * can't just reset from within the driver, because the reset + * bits are in the power domain's register area, and get set + * during the poweron process. + */ + return 0; } static void vc4_v3d_init_hw(struct drm_device *dev)