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authorAlan Cox <alan@linux.intel.com>2012-03-05 14:22:16 +0000
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-05 14:53:01 -0800
commit055bf38d3d6069707e2d555cffdde629b8404ff2 (patch)
tree94c99f102d3cbd372fc124c663c311a6669c4ed8
parentaa139092de3bb7d8b81f9b8433e12e87ac1eec3f (diff)
drm, gma500: Fix Cedarview boot failures in 3.3-rc
Production GMA3600/3650 hardware turns out to be subtly different to the development platforms. This combined with a minor driver bug is causing the kernel to hang on these platforms. This patch does the following - turn down a couple of messages that were meant to be debug and are causing much confusion - ensure the hotplug interrupt is disabled on Cedartrail systems. - fix a bug where gtt roll mode called psbfb_sync, which tries to sync the 2D engine. On other devices it is harmless as the 2D engine is present but not in use when in gtt roll mode, on Cedartrail it causes a hang Without these changes 3.3-rc hangs on boot on Cedartrail based systems. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/gpu/drm/gma500/cdv_device.c2
-rw-r--r--drivers/gpu/drm/gma500/framebuffer.c1
-rw-r--r--drivers/gpu/drm/gma500/gtt.c9
3 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpu/drm/gma500/cdv_device.c b/drivers/gpu/drm/gma500/cdv_device.c
index 4a5b099c3bc..53404af2e74 100644
--- a/drivers/gpu/drm/gma500/cdv_device.c
+++ b/drivers/gpu/drm/gma500/cdv_device.c
@@ -321,6 +321,8 @@ static int cdv_chip_setup(struct drm_device *dev)
cdv_get_core_freq(dev);
gma_intel_opregion_init(dev);
psb_intel_init_bios(dev);
+ REG_WRITE(PORT_HOTPLUG_EN, 0);
+ REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
return 0;
}
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 830dfdd6bf1..be616735ec9 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -247,7 +247,6 @@ static struct fb_ops psbfb_roll_ops = {
.fb_imageblit = cfb_imageblit,
.fb_pan_display = psbfb_pan,
.fb_mmap = psbfb_mmap,
- .fb_sync = psbfb_sync,
.fb_ioctl = psbfb_ioctl,
};
diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c
index 5d5330f667f..aff194fbe9f 100644
--- a/drivers/gpu/drm/gma500/gtt.c
+++ b/drivers/gpu/drm/gma500/gtt.c
@@ -446,10 +446,9 @@ int psb_gtt_init(struct drm_device *dev, int resume)
pg->gtt_start = pci_resource_start(dev->pdev, PSB_GTT_RESOURCE);
gtt_pages = pci_resource_len(dev->pdev, PSB_GTT_RESOURCE)
>> PAGE_SHIFT;
- /* Some CDV firmware doesn't report this currently. In which case the
- system has 64 gtt pages */
+ /* CDV doesn't report this. In which case the system has 64 gtt pages */
if (pg->gtt_start == 0 || gtt_pages == 0) {
- dev_err(dev->dev, "GTT PCI BAR not initialized.\n");
+ dev_dbg(dev->dev, "GTT PCI BAR not initialized.\n");
gtt_pages = 64;
pg->gtt_start = dev_priv->pge_ctl;
}
@@ -461,10 +460,10 @@ int psb_gtt_init(struct drm_device *dev, int resume)
if (pg->gatt_pages == 0 || pg->gatt_start == 0) {
static struct resource fudge; /* Preferably peppermint */
- /* This can occur on CDV SDV systems. Fudge it in this case.
+ /* This can occur on CDV systems. Fudge it in this case.
We really don't care what imaginary space is being allocated
at this point */
- dev_err(dev->dev, "GATT PCI BAR not initialized.\n");
+ dev_dbg(dev->dev, "GATT PCI BAR not initialized.\n");
pg->gatt_start = 0x40000000;
pg->gatt_pages = (128 * 1024 * 1024) >> PAGE_SHIFT;
/* This is a little confusing but in fact the GTT is providing