evie/android_kernel_oneplus_msm8998
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drm/msm: disable HDCP before turning off timing engine

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As per the hardware programming sequence, HDCP authentication
process must start after turning ON the timing engine and the
authentication process should be stopped before turning OFF
the timing engine.

Implement this sequence during the HDMI turn OFF sequence.

Also, make sure to wait for one frame before disabling the DDC
while turning OFF the HDCP. This is required to make sure we
receive the HDCP encryption disabled interrupt before disabling
the HW.

Change-Id: I3174f51fe1b6ab578db2d38caaf761444e6ebd8f
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
This commit is contained in:
Abhinav Kumar 2017-11-20 21:49:04 -08:00
parent d33ed6b2cc
commit 172ea1ed54
2 changed files with 11 additions and 5 deletions
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6
drivers/gpu/drm/msm/hdmi-staging/sde_hdmi_bridge.c
View file

@ -578,6 +578,9 @@ static void _sde_hdmi_bridge_disable(struct drm_bridge *bridge)
display->sink_hdcp_ver = SDE_HDMI_HDCP_NONE; display->sink_hdcp_ver = SDE_HDMI_HDCP_NONE;
display->sink_hdcp22_support = false; display->sink_hdcp22_support = false;
if (sde_hdmi_tx_is_hdcp_enabled(display))
sde_hdmi_hdcp_off(display);
sde_hdmi_clear_hdr_info(bridge); sde_hdmi_clear_hdr_info(bridge);
mutex_unlock(&display->display_lock); mutex_unlock(&display->display_lock);
} }
@ -592,9 +595,6 @@ static void _sde_hdmi_bridge_post_disable(struct drm_bridge *bridge)
sde_hdmi_notify_clients(display, display->connected); sde_hdmi_notify_clients(display, display->connected);
if (sde_hdmi_tx_is_hdcp_enabled(display))
sde_hdmi_hdcp_off(display);
sde_hdmi_audio_off(hdmi); sde_hdmi_audio_off(hdmi);
DRM_DEBUG("power down"); DRM_DEBUG("power down");

10
drivers/gpu/drm/msm/hdmi-staging/sde_hdmi_hdcp2p2.c
View file

@ -234,10 +234,16 @@ static void sde_hdmi_hdcp2p2_off(void *input)
flush_kthread_worker(&ctrl->worker); flush_kthread_worker(&ctrl->worker);
sde_hdmi_hdcp2p2_ddc_disable((void *)ctrl->init_data.cb_data);
cdata.context = input; cdata.context = input;
sde_hdmi_hdcp2p2_wakeup(&cdata); sde_hdmi_hdcp2p2_wakeup(&cdata);
/* There could be upto one frame delay
* between the time encryption disable is
* requested till the time we get encryption
* disabled interrupt
*/
msleep(20);
sde_hdmi_hdcp2p2_ddc_disable((void *)ctrl->init_data.cb_data);
} }
static int sde_hdmi_hdcp2p2_authenticate(void *input) static int sde_hdmi_hdcp2p2_authenticate(void *input)