diff options
| author | Ajay Singh Parmar <aparmar@codeaurora.org> | 2014-01-12 16:52:51 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 20:25:15 -0700 |
| commit | 112fac3fa3f442633f8de4033ed88dba64c8ee1a (patch) | |
| tree | b7040a4fc13bd3f3a4d6e66505622a140ae0038b /drivers/video/fbdev | |
| parent | a8c6d5f6c455d04a50acb7427e8019b47e34aff5 (diff) | |
msm: mdss: hdmi: Support for HPD enable/disable
Provide support for HPD (Hot Plug Detection) enable/disable
using sysfs node. Write 3 to sysfs node "hpd" to disable the
HPD until written 4 to enable it back.
Change-Id: Ib80ea1f55b859e7935e7f187dc06222ab6bea2d8
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>
Diffstat (limited to 'drivers/video/fbdev')
| -rw-r--r-- | drivers/video/fbdev/msm/mdss_hdmi_tx.c | 25 | ||||
| -rw-r--r-- | drivers/video/fbdev/msm/mdss_hdmi_tx.h | 1 |
2 files changed, 25 insertions, 1 deletions
diff --git a/drivers/video/fbdev/msm/mdss_hdmi_tx.c b/drivers/video/fbdev/msm/mdss_hdmi_tx.c index cda1f39c7f1b..ca16e083d1de 100644 --- a/drivers/video/fbdev/msm/mdss_hdmi_tx.c +++ b/drivers/video/fbdev/msm/mdss_hdmi_tx.c @@ -103,7 +103,9 @@ enum msm_hdmi_supported_audio_sample_rates { enum hdmi_tx_hpd_states { HPD_OFF, HPD_ON, - HPD_ON_CONDITIONAL_MTP + HPD_ON_CONDITIONAL_MTP, + HPD_DISABLE, + HPD_ENABLE }; /* parameters for clock regeneration */ @@ -596,6 +598,10 @@ static ssize_t hdmi_tx_sysfs_wta_hpd(struct device *dev, switch (hpd) { case HPD_OFF: + case HPD_DISABLE: + if (hpd == HPD_DISABLE) + hdmi_ctrl->hpd_disabled = true; + if (!hdmi_ctrl->hpd_feature_on) { DEV_DBG("%s: HPD is already off\n", __func__); return ret; @@ -613,6 +619,12 @@ static ssize_t hdmi_tx_sysfs_wta_hpd(struct device *dev, hdmi_ctrl->sdev.state); break; case HPD_ON: + if (hdmi_ctrl->hpd_disabled == true) { + DEV_ERR("%s: hpd is disabled, state %d not allowed\n", + __func__, hpd); + return ret; + } + if (hdmi_ctrl->pdata.cond_power_on) { DEV_ERR("%s: hpd state %d not allowed w/ cond. hpd\n", __func__, hpd); @@ -627,6 +639,12 @@ static ssize_t hdmi_tx_sysfs_wta_hpd(struct device *dev, rc = hdmi_tx_sysfs_enable_hpd(hdmi_ctrl, true); break; case HPD_ON_CONDITIONAL_MTP: + if (hdmi_ctrl->hpd_disabled == true) { + DEV_ERR("%s: hpd is disabled, state %d not allowed\n", + __func__, hpd); + return ret; + } + if (!hdmi_ctrl->pdata.cond_power_on) { DEV_ERR("%s: hpd state %d not allowed w/o cond. hpd\n", __func__, hpd); @@ -640,6 +658,11 @@ static ssize_t hdmi_tx_sysfs_wta_hpd(struct device *dev, rc = hdmi_tx_sysfs_enable_hpd(hdmi_ctrl, true); break; + case HPD_ENABLE: + hdmi_ctrl->hpd_disabled = false; + + rc = hdmi_tx_sysfs_enable_hpd(hdmi_ctrl, true); + break; default: DEV_ERR("%s: Invalid HPD state requested\n", __func__); return ret; diff --git a/drivers/video/fbdev/msm/mdss_hdmi_tx.h b/drivers/video/fbdev/msm/mdss_hdmi_tx.h index 7e31c1f9f4da..366e1a8b4aca 100644 --- a/drivers/video/fbdev/msm/mdss_hdmi_tx.h +++ b/drivers/video/fbdev/msm/mdss_hdmi_tx.h @@ -84,6 +84,7 @@ struct hdmi_tx_ctrl { struct work_struct cable_notify_work; bool hdcp_feature_on; + bool hpd_disabled; u32 present_hdcp; u8 spd_vendor_name[9]; |