drm/msm: Remove too many hdmi_i2c_xfer warnings

On 8996 AUTO platform, too many "hdmi_i2c_xfer" warnings appear
when booting that makes boot time longer and may cause watchdog
bite. The warning is generated by WARN_ON() in hdmi_i2c_xfer()
which prints call stack like:
        hdmi_i2c_xfer+0x44/0x398
        __i2c_transfer+0x270/0x4b4
        i2c_transfer+0x64/0xb0
        hdmi_ddc_read+0x84/0xdc
        sde_hdmi_scdc_write+0xac/0x178
        _sde_hdmi_bridge_mode_set+0x928/0xa34
        drm_bridge_mode_set+0x30/0x54
        complete_commit+0x448/0x938
        _msm_drm_commit_work_cb+0xb0/0x1a0
        kthread_worker_fn+0xcc/0x170
        kthread+0xf8/0x100
        ret_from_fork+0x10/0x20
The reason is the HDMI_CTRL_ENABLE bit of REG_HDMI_CTRL register
is disabled during the reset by the first commit. This reset is
caused by the missing of HPD regulator enabling in HPD call sequence.
So to remove the HDMI i2c warning, the patch enables HPD regulator
to avoid the reset.

Change-Id: I91e853535a972f241c7aa2d28c05785569ae23db
CRs-fixed: 2093649
Signed-off-by: Yujun Zhang <yujunzhang@codeaurora.org>

0 files changed, 0 insertions, 0 deletions