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authorBen Skeggs <bskeggs@redhat.com>2010-02-09 10:22:29 +1000
committerBen Skeggs <bskeggs@redhat.com>2010-02-10 08:19:18 +1000
commit39c9bfb453b748ce220ceefacbe2a5c19fabf67b (patch)
treeadc629eb6e8fb8303e5ce2e950871889e035d06c
parent1ee7698fc3ec3d7949fa55e5154c8f5de8f1c3d9 (diff)
drm/nv50: prevent multiple init tables being parsed at the same time
With DVI and DP plugged, the DVI clock change interrupts being run can cause DP link training to fail. This adds a spinlock around init table parsing to prevent this. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_bios.c17
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_bios.h2
2 files changed, 11 insertions, 8 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index fb4793e65ff..2cd0fad17da 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -3765,7 +3765,6 @@ nouveau_bios_run_display_table(struct drm_device *dev, struct dcb_entry *dcbent,
*/
struct drm_nouveau_private *dev_priv = dev->dev_private;
- struct init_exec iexec = {true, false};
struct nvbios *bios = &dev_priv->VBIOS;
uint8_t *table = &bios->data[bios->display.script_table_ptr];
uint8_t *otable = NULL;
@@ -3845,8 +3844,6 @@ nouveau_bios_run_display_table(struct drm_device *dev, struct dcb_entry *dcbent,
}
}
- bios->display.output = dcbent;
-
if (pxclk == 0) {
script = ROM16(otable[6]);
if (!script) {
@@ -3855,7 +3852,7 @@ nouveau_bios_run_display_table(struct drm_device *dev, struct dcb_entry *dcbent,
}
NV_TRACE(dev, "0x%04X: parsing output script 0\n", script);
- parse_init_table(bios, script, &iexec);
+ nouveau_bios_run_init_table(dev, script, dcbent);
} else
if (pxclk == -1) {
script = ROM16(otable[8]);
@@ -3865,7 +3862,7 @@ nouveau_bios_run_display_table(struct drm_device *dev, struct dcb_entry *dcbent,
}
NV_TRACE(dev, "0x%04X: parsing output script 1\n", script);
- parse_init_table(bios, script, &iexec);
+ nouveau_bios_run_init_table(dev, script, dcbent);
} else
if (pxclk == -2) {
if (table[4] >= 12)
@@ -3878,7 +3875,7 @@ nouveau_bios_run_display_table(struct drm_device *dev, struct dcb_entry *dcbent,
}
NV_TRACE(dev, "0x%04X: parsing output script 2\n", script);
- parse_init_table(bios, script, &iexec);
+ nouveau_bios_run_init_table(dev, script, dcbent);
} else
if (pxclk > 0) {
script = ROM16(otable[table[4] + i*6 + 2]);
@@ -3890,7 +3887,7 @@ nouveau_bios_run_display_table(struct drm_device *dev, struct dcb_entry *dcbent,
}
NV_TRACE(dev, "0x%04X: parsing clock script 0\n", script);
- parse_init_table(bios, script, &iexec);
+ nouveau_bios_run_init_table(dev, script, dcbent);
} else
if (pxclk < 0) {
script = ROM16(otable[table[4] + i*6 + 4]);
@@ -3902,7 +3899,7 @@ nouveau_bios_run_display_table(struct drm_device *dev, struct dcb_entry *dcbent,
}
NV_TRACE(dev, "0x%04X: parsing clock script 1\n", script);
- parse_init_table(bios, script, &iexec);
+ nouveau_bios_run_init_table(dev, script, dcbent);
}
return 0;
@@ -5864,10 +5861,13 @@ nouveau_bios_run_init_table(struct drm_device *dev, uint16_t table,
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nvbios *bios = &dev_priv->VBIOS;
struct init_exec iexec = { true, false };
+ unsigned long flags;
+ spin_lock_irqsave(&bios->lock, flags);
bios->display.output = dcbent;
parse_init_table(bios, table, &iexec);
bios->display.output = NULL;
+ spin_unlock_irqrestore(&bios->lock, flags);
}
static bool NVInitVBIOS(struct drm_device *dev)
@@ -5876,6 +5876,7 @@ static bool NVInitVBIOS(struct drm_device *dev)
struct nvbios *bios = &dev_priv->VBIOS;
memset(bios, 0, sizeof(struct nvbios));
+ spin_lock_init(&bios->lock);
bios->dev = dev;
if (!NVShadowVBIOS(dev, bios->data))
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.h b/drivers/gpu/drm/nouveau/nouveau_bios.h
index 058e98c76d8..68446fd4146 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.h
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.h
@@ -205,6 +205,8 @@ struct nvbios {
struct drm_device *dev;
struct nouveau_bios_info pub;
+ spinlock_t lock;
+
uint8_t data[NV_PROM_SIZE];
unsigned int length;
bool execute;