diff options
| author | Brian Starkey <brian.starkey@arm.com> | 2016-11-08 11:36:14 +0000 |
|---|---|---|
| committer | Liviu Dudau <Liviu.Dudau@arm.com> | 2016-11-08 11:40:02 +0000 |
| commit | e64053f05eb924db45f90a1556a200d1acb4b01e (patch) | |
| tree | e2c81d2396738319539cf9f66a0bcf98452dd4df /drivers/gpu/drm/arm | |
| parent | ed8b0c0f93fd91447770ced4a7ecac1a1f39eae2 (diff) | |
| download | linux-e64053f05eb924db45f90a1556a200d1acb4b01e.tar.bz2 | |
drm: mali-dp: Clear CVAL when leaving config mode
It's possible for CVAL to get set whilst we are in config mode. If this
happens, afer we leave config mode the HW will latch whatever
configuration is in the registers at the next vsync. Most likely this
will be a partial configuration, as we'll be racing against the ongoing
atomic_commit.
To avoid this, clear CVAL before leaving config mode.
Signed-off-by: Brian Starkey <brian.starkey@arm.com>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Diffstat (limited to 'drivers/gpu/drm/arm')
| -rw-r--r-- | drivers/gpu/drm/arm/malidp_hw.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c index 18c476605c0c..4bdf531f7844 100644 --- a/drivers/gpu/drm/arm/malidp_hw.c +++ b/drivers/gpu/drm/arm/malidp_hw.c @@ -125,6 +125,7 @@ static void malidp500_leave_config_mode(struct malidp_hw_device *hwdev) { u32 status, count = 100; + malidp_hw_clearbits(hwdev, MALIDP_CFG_VALID, MALIDP500_CONFIG_VALID); malidp_hw_clearbits(hwdev, MALIDP500_DC_CONFIG_REQ, MALIDP500_DC_CONTROL); while (count) { status = malidp_hw_read(hwdev, hwdev->map.dc_base + MALIDP_REG_STATUS); @@ -266,6 +267,7 @@ static void malidp550_leave_config_mode(struct malidp_hw_device *hwdev) { u32 status, count = 100; + malidp_hw_clearbits(hwdev, MALIDP_CFG_VALID, MALIDP550_CONFIG_VALID); malidp_hw_clearbits(hwdev, MALIDP550_DC_CONFIG_REQ, MALIDP550_DC_CONTROL); while (count) { status = malidp_hw_read(hwdev, hwdev->map.dc_base + MALIDP_REG_STATUS); |