diff options
| author | Min-wuk Lee <mlee@nvidia.com> | 2013-09-06 17:43:06 +0900 |
|---|---|---|
| committer | Gabby Lee <galee@nvidia.com> | 2013-10-13 16:33:47 -0700 |
| commit | ee6ed3c4f8d10c4d148619dbfed13a8b9d6b2130 (patch) | |
| tree | 57f5c5f52c3debdb5ce62f075e939eb0c3da8a67 /security | |
| parent | e75f9f1a9c2279a312d9184f319c8e802386ac1d (diff) | |
tegra: video: hdmi: WAR: ensure hdcp register access with clk enabled
There is a race condition between hdcp upstream and hdmi disable
during suspend/resume stress with hdmi plugged-in. WAR by making
host1x/hdmi clk enabled and hdmi clk out of reset.
Bug 1349507
Change-Id: I6870066358900d6f6798b3e20bc59bf5645f25b8
Original-author: Roger Hsieh <rhsieh@nvidia.com>
Signed-off-by: Roger Hsieh <rhsieh@nvidia.com>
Signed-off-by: Min-wuk Lee <mlee@nvidia.com>
Reviewed-on: http://git-master/r/271389
(cherry picked from commit 8a2f117c4472919ec22263c858fbac1a91ee5e72)
Reviewed-on: http://git-master/r/289848
Reviewed-by: Gabby Lee <galee@nvidia.com>
Tested-by: Gabby Lee <galee@nvidia.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/tf_driver/tf_device.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/security/tf_driver/tf_device.c b/security/tf_driver/tf_device.c index 70d6a70a6244..3a10acf93b1f 100644 --- a/security/tf_driver/tf_device.c +++ b/security/tf_driver/tf_device.c @@ -55,6 +55,9 @@ * Forward Declarations *----------------------------------------------------------------------------*/ +extern void tegra_hdmi_enable_clk(void); +extern void tegra_hdmi_disable_clk(void); + /* * Creates and registers the device to be managed by the specified driver. * @@ -743,10 +746,12 @@ static long tf_device_ioctl(struct file *file, unsigned int ioctl_num, break; case TF_MESSAGE_TYPE_INVOKE_CLIENT_COMMAND: + tegra_hdmi_enable_clk(); trace_invoke_client_command(NVSEC_INVOKE_CMD_START); result = tf_invoke_client_command(connection, &command, &answer); trace_invoke_client_command(NVSEC_INVOKE_CMD_DONE); + tegra_hdmi_disable_clk(); break; case TF_MESSAGE_TYPE_CANCEL_CLIENT_COMMAND: |