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drm/radeon: fix display handling in radeon_gpu_reset 

If the display hw was reset or a hard reset was used,
we need to re-init some of the common display hardware as well.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2014-08-18 16:51:46 -04:00
parent c940b4476f
commit 73ef0e0d62
1 changed files with 16 additions and 0 deletions
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16
drivers/gpu/drm/radeon/radeon_device.c
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@ -1681,6 +1681,7 @@ int radeon_gpu_reset(struct radeon_device *rdev)
/* block TTM */
resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
radeon_suspend(rdev);
radeon_hpd_fini(rdev);
for (i = 0; i < RADEON_NUM_RINGS; ++i) {
ring_sizes[i] = radeon_ring_backup(rdev, &rdev->ring[i],
@ -1737,6 +1738,21 @@ retry:
radeon_pm_resume(rdev);
}
/* init dig PHYs, disp eng pll */
if (rdev->is_atom_bios) {
radeon_atom_encoder_init(rdev);
radeon_atom_disp_eng_pll_init(rdev);
/* turn on the BL */
if (rdev->mode_info.bl_encoder) {
u8 bl_level = radeon_get_backlight_level(rdev,
rdev->mode_info.bl_encoder);
radeon_set_backlight_level(rdev, rdev->mode_info.bl_encoder,
bl_level);
}
}
/* reset hpd state */
radeon_hpd_init(rdev);
drm_helper_resume_force_mode(rdev->ddev);
/* set the power state here in case we are a PX system or headless */