From: Simon Farnsworth <simon.farnsworth@onelan.com>
To: dri-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Cc: Simon Farnsworth <simon.farnsworth@onelan.com>
Subject: [PATCH] DRM: Fix VBlank IRQ on VIA hardware.
Date: Fri, 10 Jul 2009 11:25:16 +0100 [thread overview]
Message-ID: <1247221516-28054-1-git-send-email-simon.farnsworth@onelan.com> (raw)
via_enable_vblank wasn't setting the VBlank enable bit - instead, it
was masking out the rest of the register.
At the same time, fix via_disable_vblank to clear the VBlank enable
bit.
---
drivers/gpu/drm/via/via_irq.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/via/via_irq.c b/drivers/gpu/drm/via/via_irq.c
index c248c1d..5935b88 100644
--- a/drivers/gpu/drm/via/via_irq.c
+++ b/drivers/gpu/drm/via/via_irq.c
@@ -183,7 +183,7 @@ int via_enable_vblank(struct drm_device *dev, int crtc)
}
status = VIA_READ(VIA_REG_INTERRUPT);
- VIA_WRITE(VIA_REG_INTERRUPT, status & VIA_IRQ_VBLANK_ENABLE);
+ VIA_WRITE(VIA_REG_INTERRUPT, status | VIA_IRQ_VBLANK_ENABLE);
VIA_WRITE8(0x83d4, 0x11);
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) | 0x30);
@@ -194,6 +194,10 @@ int via_enable_vblank(struct drm_device *dev, int crtc)
void via_disable_vblank(struct drm_device *dev, int crtc)
{
drm_via_private_t *dev_priv = dev->dev_private;
+ u32 status;
+
+ status = VIA_READ(VIA_REG_INTERRUPT);
+ VIA_WRITE(VIA_REG_INTERRUPT, status & ~VIA_IRQ_VBLANK_ENABLE);
VIA_WRITE8(0x83d4, 0x11);
VIA_WRITE8(0x83d5, VIA_READ8(0x83d5) & ~0x30);
--
1.5.4.1
reply other threads:[~2009-07-10 11:20 UTC|newest]
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