diff options
| author | Sandor Yu <Sandor.yu@nxp.com> | 2018-09-27 14:28:58 +0800 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:34:18 +0800 |
| commit | 6699f37c41ec3643aec08f546878dea75a401ac5 (patch) | |
| tree | 55b0951873696dc122a6510c50ba7c4009cd0053 /drivers/video | |
| parent | 6f3a28ffc490852653dc11ecbab13d707addcabc (diff) | |
MLK-18895: hdmi: Reset HDMI PHY when enable/disable HDCP function
Some HDMI Sink may failed to work when running HDCP enable/disable
stress test. HDMI sink may not support change HDCP state on the fly.
So reset HDMI PHY and controller to resolve the issue.
Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/mxc/mxc_hdmi.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/video/fbdev/mxc/mxc_hdmi.c b/drivers/video/fbdev/mxc/mxc_hdmi.c index 9e844805c0d2..c8aeadda0288 100644 --- a/drivers/video/fbdev/mxc/mxc_hdmi.c +++ b/drivers/video/fbdev/mxc/mxc_hdmi.c @@ -194,6 +194,7 @@ extern const struct fb_videomode mxc_cea_mode[64]; extern void mxc_hdmi_cec_handle(u16 cec_stat); static void mxc_hdmi_setup(struct mxc_hdmi *hdmi, unsigned long event); +static void mxc_hdmi_phy_disable(struct mxc_hdmi *hdmi); static void hdmi_enable_overflow_interrupts(void); static void hdmi_disable_overflow_interrupts(void); @@ -337,6 +338,7 @@ static ssize_t mxc_hdmi_store_hdcp_enable(struct device *dev, char event_string[32]; char *envp[] = { event_string, NULL }; unsigned long value; + u8 clkdis; int ret; ret = kstrtoul(buf, 10, &value); @@ -345,6 +347,13 @@ static ssize_t mxc_hdmi_store_hdcp_enable(struct device *dev, hdmi->hdmi_data.hdcp_enable = value; + /* Disable All HDMI clock and HDMI PHY */ + clkdis = hdmi_readb(HDMI_MC_CLKDIS); + clkdis |= 0x5f; + hdmi_writeb(clkdis, HDMI_MC_CLKDIS); + mxc_hdmi_phy_disable(hdmi); + hdmi_disable_overflow_interrupts(); + /* Reconfig HDMI for HDCP */ mxc_hdmi_setup(hdmi, 0); |