diff options
| author | Carsten Haitzler <carsten.haitzler@arm.com> | 2022-06-06 14:47:13 +0300 |
|---|---|---|
| committer | Liviu Dudau <liviu.dudau@arm.com> | 2022-07-22 15:12:46 +0300 |
| commit | a8ff2cd916e62b740718a908fbaa1e9ec8a147f1 (patch) | |
| tree | ab0f67708821703e80a2f4f61de6cfd5f958c7ab /drivers/gpu/drm/arm | |
| parent | 000a2f0498f29b0831496bb1fdab3354b00704a2 (diff) | |
| download | linux-a8ff2cd916e62b740718a908fbaa1e9ec8a147f1.tar.xz | |
drm/komeda - At init write GCU control block to handle already on DPU
If something has already set up the DPU before the komeda driver comes
up, it will fail to init because it was just writing to the SRST bit in
the GCU control register and ignoring others. This resulted in TBU
bringup stalling and init failing. By writing completely we also set the
mode back to 0 (inactive) too and thus TBU bringup works.
Signed-off-by: Carsten Haitzler <carsten.haitzler@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220606114714.175499-2-carsten.haitzler@foss.arm.com
Diffstat (limited to 'drivers/gpu/drm/arm')
| -rw-r--r-- | drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c index daa1faccd3e7..6c56f5662bc7 100644 --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c @@ -310,8 +310,7 @@ static int d71_reset(struct d71_dev *d71) u32 __iomem *gcu = d71->gcu_addr; int ret; - malidp_write32_mask(gcu, BLK_CONTROL, - GCU_CONTROL_SRST, GCU_CONTROL_SRST); + malidp_write32(gcu, BLK_CONTROL, GCU_CONTROL_SRST); ret = dp_wait_cond(!(malidp_read32(gcu, BLK_CONTROL) & GCU_CONTROL_SRST), 100, 1000, 10000); |