diff options
| author | Mikko Perttunen <mperttunen@nvidia.com> | 2013-07-30 08:35:03 (GMT) |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2013-08-27 08:19:39 (GMT) |
| commit | ccaddfe1a2e10f50aa6f553f9791c2724b6d3c4a (patch) | |
| tree | b882e56d3bc1a777d9785fe760e0789bc7cee8b2 /drivers/gpu/host1x/drm/hdmi.c | |
| parent | 3b2f64d00c46e1e4e9bd0bb9bb12619adac27a4b (diff) | |
| download | linux-ccaddfe1a2e10f50aa6f553f9791c2724b6d3c4a.tar.xz | |
drm/tegra: hdmi: Make sure clock is enabled before dumping registers
The debugfs register dumping function did not enable the HDMI clock.
This led to a possible system hang when reading the debugfs entry
while no HDMI cable was connected to the system. This patch makes
sure that the clock is enabled during the read.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/host1x/drm/hdmi.c')
| -rw-r--r-- | drivers/gpu/host1x/drm/hdmi.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/drm/hdmi.c b/drivers/gpu/host1x/drm/hdmi.c index 01097da..bf7f027 100644 --- a/drivers/gpu/host1x/drm/hdmi.c +++ b/drivers/gpu/host1x/drm/hdmi.c @@ -904,6 +904,11 @@ static int tegra_hdmi_show_regs(struct seq_file *s, void *data) { struct drm_info_node *node = s->private; struct tegra_hdmi *hdmi = node->info_ent->data; + int err; + + err = clk_enable(hdmi->clk); + if (err) + return err; #define DUMP_REG(name) \ seq_printf(s, "%-56s %#05x %08lx\n", #name, name, \ @@ -1069,6 +1074,8 @@ static int tegra_hdmi_show_regs(struct seq_file *s, void *data) #undef DUMP_REG + clk_disable(hdmi->clk); + return 0; } |