From: Tomeu Vizoso Date: Fri, 23 Sep 2016 14:06:40 +0000 (+0200) Subject: drm/rockchip: analogix_dp: Refuse to enable PSR if panel doesn't support it X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0546d685f07cc4fc5748fd36e57d167877c2842d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git 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 --- 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);