Add #include <linux/seq_file.h> to *_dpm.c files
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This allows you to look at the current DPM state via
debugfs.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

We weren't properly catching errors in dpm_enable()
and dpm_set_power_state().
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Use the new asic callback instead.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This properly implemented dynamic state adjustment by
using a working copy of the requested and current
power states.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Needed to properly handle dynamic state adjustment.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

Use a dedicated copy of the current power state since
we may have to adjust it on the fly.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

v2: fix typo noticed by Dan Carpenter
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

This adds dpm support for trinity asics.  This includes:
- clockgating
- powergating
- dynamic engine clock scaling
- dynamic voltage scaling

set radeon.dpm=1 to enable it.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>