On 2018-01-02 10:20 PM, Rex Zhu wrote:
> This patch can fix MultiGPU-Display blank
> out with 1 IGPU-4k display and 2 DGPU-two 4K
> displays.
>
> Change-Id: I41208feb6b275d9e8b45e9ef129e19c9739107a4
> Signed-off-by: Rex Zhu <[email protected]>
> ---
> drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
> b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
> index fa9d161..977fcdf 100644
> --- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
> +++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
> @@ -1425,9 +1425,14 @@ static int pp_get_display_mode_validation_clocks(void
> *handle,
>
> if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps,
> PHM_PlatformCaps_DynamicPatchPowerState))
> ret = phm_get_max_high_clocks(hwmgr, clocks);
> -
> mutex_unlock(&pp_handle->pp_lock);
> - return ret;
> +
> + if (ret) {
Does phm_get_max_high_clocks fail because get_max_high_clocks is not
implemented for dGPU?
> + clocks->memory_max_clock = pp_dpm_get_mclk(handle, false);
> + clocks->engine_max_clock = pp_dpm_get_sclk(handle, false);
Would it make more sense to keep this inside phm_get_max_high_clocks as
fallback when get_max_high_clocks is not implemented? Should we also print a
warning in this case?
Harry
> + }
> +
> + return 0;
> }
>
> const struct amd_pm_funcs pp_dpm_funcs = {
>
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