drm/radeon: make sure mode init is complete in bandwidth_update

commit 8efe82ca908400785253c8f0dfcf301e6bd93488 upstream.

The power management code calls into the display code for
certain things.  If certain power management sysfs attributes
are called before the driver has finished initializing all of
the hardware we can run into problems with uninitialized
modesetting state.  Add a check to make sure modesetting
init has completed to the bandwidth update callbacks to
fix this.  Can be triggered by the tlp and laptop start
up scripts depending on the timing.

bugs:
https://bugzilla.kernel.org/show_bug.cgi?id=83611
https://bugs.freedesktop.org/show_bug.cgi?id=85771

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index e94eb72..ddf70d6 100644 (file)
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -8893,6 +8893,9 @@ void dce8_bandwidth_update(struct radeon_device *rdev)
        u32 num_heads = 0, lb_size;
        int i;
 
+       if (!rdev->mode_info.mode_config_initialized)
+               return;
+
        radeon_update_display_priority(rdev);
 
        for (i = 0; i < rdev->num_crtc; i++) {

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 4b3c5f7..6594cee 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -2362,6 +2362,9 @@ void evergreen_bandwidth_update(struct radeon_device *rdev)
        u32 num_heads = 0, lb_size;
        int i;
 
+       if (!rdev->mode_info.mode_config_initialized)
+               return;
+
        radeon_update_display_priority(rdev);
 
        for (i = 0; i < rdev->num_crtc; i++) {

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 3cc78bb..07620e1 100644 (file)
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -3219,6 +3219,9 @@ void r100_bandwidth_update(struct radeon_device *rdev)
        uint32_t pixel_bytes1 = 0;
        uint32_t pixel_bytes2 = 0;
 
+       if (!rdev->mode_info.mode_config_initialized)
+               return;
+
        radeon_update_display_priority(rdev);
 
        if (rdev->mode_info.crtcs[0]->base.enabled) {

diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c
index 95b693c..e5619d5 100644 (file)
--- a/drivers/gpu/drm/radeon/rs600.c
+++ b/drivers/gpu/drm/radeon/rs600.c
@@ -890,6 +890,9 @@ void rs600_bandwidth_update(struct radeon_device *rdev)
        u32 d1mode_priority_a_cnt, d2mode_priority_a_cnt;
        /* FIXME: implement full support */
 
+       if (!rdev->mode_info.mode_config_initialized)
+               return;
+
        radeon_update_display_priority(rdev);
 
        if (rdev->mode_info.crtcs[0]->base.enabled)

diff --git a/drivers/gpu/drm/radeon/rs690.c b/drivers/gpu/drm/radeon/rs690.c
index 3462b64..0a2d36e 100644 (file)
--- a/drivers/gpu/drm/radeon/rs690.c
+++ b/drivers/gpu/drm/radeon/rs690.c
@@ -579,6 +579,9 @@ void rs690_bandwidth_update(struct radeon_device *rdev)
        u32 d1mode_priority_a_cnt, d1mode_priority_b_cnt;
        u32 d2mode_priority_a_cnt, d2mode_priority_b_cnt;
 
+       if (!rdev->mode_info.mode_config_initialized)
+               return;
+
        radeon_update_display_priority(rdev);
 
        if (rdev->mode_info.crtcs[0]->base.enabled)

diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c
index 237dd29..b49965a 100644 (file)
--- a/drivers/gpu/drm/radeon/rv515.c
+++ b/drivers/gpu/drm/radeon/rv515.c
@@ -1276,6 +1276,9 @@ void rv515_bandwidth_update(struct radeon_device *rdev)
        struct drm_display_mode *mode0 = NULL;
        struct drm_display_mode *mode1 = NULL;
 
+       if (!rdev->mode_info.mode_config_initialized)
+               return;
+
        radeon_update_display_priority(rdev);
 
        if (rdev->mode_info.crtcs[0]->base.enabled)

diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index 559564c..52b64ad 100644 (file)
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -2227,6 +2227,9 @@ void dce6_bandwidth_update(struct radeon_device *rdev)
        u32 num_heads = 0, lb_size;
        int i;
 
+       if (!rdev->mode_info.mode_config_initialized)
+               return;
+
        radeon_update_display_priority(rdev);
 
        for (i = 0; i < rdev->num_crtc; i++) {