[PATCH 2/2] drm/amd/display: disable RCO for DCN314

[Harry Wentland]

On 6/14/23 16:42, Hamza Mahfooz wrote:
> From: Daniel Miess <daniel.miess at amd.com>
> 
> [Why]
> RCO is causing error messages on some DCN314 systems
> 
> [How]
> Force disable RCO for DCN314
> 
> Fixes: 0e1961c93839 ("drm/amd/display: Enable dcn314 DPP RCO")
> Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
> Acked-by: Hamza Mahfooz <hamza.mahfooz at amd.com>
> Signed-off-by: Daniel Miess <daniel.miess at amd.com>

Series is
Reviewed-by: Harry Wentland <harry.wentland at amd.com>

Harry

> ---
>  drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c     | 2 +-
>  drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c | 3 +++
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
> index cf23d7bc560a..0746ed31d1d1 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
> @@ -332,7 +332,7 @@ static void dccg314_dpp_root_clock_control(
>  {
>  	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
>  
> -	if (dccg->dpp_clock_gated[dpp_inst] == clock_on)
> +	if (dccg->dpp_clock_gated[dpp_inst] != clock_on)
>  		return;
>  
>  	if (clock_on) {
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
> index ef49b4d7742f..6a9024aa3285 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
> @@ -1908,6 +1908,9 @@ static bool dcn314_resource_construct(
>  	dc->debug.disable_dpp_power_gate = true;
>  	dc->debug.disable_hubp_power_gate = true;
>  
> +	/* Disable root clock optimization */
> +	dc->debug.root_clock_optimization.u32All = 0;
> +
>  	// Init the vm_helper
>  	if (dc->vm_helper)
>  		vm_helper_init(dc->vm_helper, 16);