From 0546d685f07cc4fc5748fd36e57d167877c2842d Mon Sep 17 00:00:00 2001 From: Tomeu Vizoso Date: Fri, 23 Sep 2016 16:06:40 +0200 Subject: [PATCH] drm/rockchip: analogix_dp: Refuse to enable PSR if panel doesn't support it There's no point in enabling PSR when the panel doesn't support it. This also avoids a problem when PSR gets enabled when a CRTC is being disabled, because sometimes in that situation the DSP_HOLD_VALID_INTR interrupt on which we wait will never arrive. This was observed on RK3288 with a panel without PSR (veyron-jaq Chromebook). It's very easy to reproduce by running the kms_rmfb test in IGT a few times. Cc: Yakir Yang Reviewed-by: Sean Paul Signed-off-by: Tomeu Vizoso Signed-off-by: Archit Taneja Link: http://patchwork.freedesktop.org/patch/msgid/1474639600-30090-2-git-send-email-tomeu.vizoso@collabora.com --- drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index e83be157cc2a..8548e8271639 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -85,6 +85,9 @@ static void analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled) struct rockchip_dp_device *dp = to_dp(encoder); unsigned long flags; + if (!analogix_dp_psr_supported(dp->dev)) + return; + dev_dbg(dp->dev, "%s PSR...\n", enabled ? "Entry" : "Exit"); spin_lock_irqsave(&dp->psr_lock, flags); -- 2.20.1