Re: Patch "drm/amd/powerplay/smu7: disable mclk switching for high refresh rates" has been added to the 4.9-stable tree

[Greg KH <gregkh@linuxfoundation.org>]

Also had to drop this one.



On Mon, Jun 05, 2017 at 02:48:43PM +0200, gregkh@linuxfoundation.org wrote:
> 
> This is a note to let you know that I've just added the patch titled
> 
>     drm/amd/powerplay/smu7: disable mclk switching for high refresh rates
> 
> to the 4.9-stable tree which can be found at:
>     http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
> 
> The filename of the patch is:
>      drm-amd-powerplay-smu7-disable-mclk-switching-for-high-refresh-rates.patch
> and it can be found in the queue-4.9 subdirectory.
> 
> If you, or anyone else, feels it should not be added to the stable tree,
> please let <stable@vger.kernel.org> know about it.
> 
> 
> >From 2275a3a2fe9914ba6d76c8ea490da3c08342bd19 Mon Sep 17 00:00:00 2001
> From: Alex Deucher <alexander.deucher@amd.com>
> Date: Thu, 11 May 2017 13:57:41 -0400
> Subject: drm/amd/powerplay/smu7: disable mclk switching for high refresh rates
> MIME-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 8bit
> 
> From: Alex Deucher <alexander.deucher@amd.com>
> 
> commit 2275a3a2fe9914ba6d76c8ea490da3c08342bd19 upstream.
> 
> Even if the vblank period would allow it, it still seems to
> be problematic on some cards.
> 
> bug: https://bugs.freedesktop.org/show_bug.cgi?id=96868
> 
> Acked-by: Christian K�nig <christian.koenig@amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> 
> ---
>  drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> --- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
> +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
> @@ -2633,7 +2633,8 @@ static int smu7_apply_state_adjust_rules
>  
>  	disable_mclk_switching = ((1 < info.display_count) ||
>  				  disable_mclk_switching_for_frame_lock ||
> -				  smu7_vblank_too_short(hwmgr, mode_info.vblank_time_us));
> +				  smu7_vblank_too_short(hwmgr, mode_info.vblank_time_us) ||
> +				  (mode_info.refresh_rate > 120));
>  
>  	sclk = smu7_ps->performance_levels[0].engine_clock;
>  	mclk = smu7_ps->performance_levels[0].memory_clock;
> 
> 
> Patches currently in stable-queue which might be from alexander.deucher@amd.com are
> 
> queue-4.9/drm-amd-powerplay-smu7-add-vblank-check-for-mclk-switching-v2.patch
> queue-4.9/drm-radeon-fix-vram_size-visible-values-in-drm_radeon_gem_info-ioctl.patch
> queue-4.9/drm-radeon-ci-disable-mclk-switching-for-high-refresh-rates-v2.patch
> queue-4.9/drm-radeon-unbreak-hpd-handling-for-r600.patch
> queue-4.9/drm-amd-powerplay-smu7-disable-mclk-switching-for-high-refresh-rates.patch