diff options
| author | Laurentiu Palcu <laurentiu.palcu@nxp.com> | 2018-07-19 14:07:14 +0300 |
|---|---|---|
| committer | Leonard Crestez <leonard.crestez@nxp.com> | 2018-08-24 12:41:33 +0300 |
| commit | 3fd243d252b1f8ea750e78d6d37c7850b075b3a7 (patch) | |
| tree | 454dd54a9de781a5a51461bf877c6a119b6a2c6d /drivers/gpu/imx | |
| parent | c2731f858614bfba872c09a39b9e6771afa87d11 (diff) | |
MLK-18826: drm: imx: dcss: fix hang when dumping registers
If DCSS is suspended, the clocks are disabled. Dumping the registers,
with the following command:
cat /sys/kernel/debug/imx-dcss/dump_registers
will hang the system, because of DTG.
This patch makes sure clocks are enabled before dumping the registers
and will immediately release them afterwards.
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@nxp.com>
Diffstat (limited to 'drivers/gpu/imx')
| -rw-r--r-- | drivers/gpu/imx/dcss/dcss-common.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/imx/dcss/dcss-common.c b/drivers/gpu/imx/dcss/dcss-common.c index 6aeb99340b4e..528ef258f513 100644 --- a/drivers/gpu/imx/dcss/dcss-common.c +++ b/drivers/gpu/imx/dcss/dcss-common.c @@ -447,6 +447,10 @@ static int dcss_trace_dump_open(struct inode *inode, struct file *file) static int dcss_dump_regs_show(struct seq_file *s, void *data) { + struct dcss_soc *dcss = s->private; + + pm_runtime_get_sync(dcss->dev); + dcss_blkctl_dump_regs(s, s->private); dcss_dtrc_dump_regs(s, s->private); dcss_dpr_dump_regs(s, s->private); @@ -458,6 +462,8 @@ static int dcss_dump_regs_show(struct seq_file *s, void *data) dcss_hdr10_dump_regs(s, s->private); dcss_ctxld_dump_regs(s, s->private); + pm_runtime_put_sync(dcss->dev); + return 0; } |