From: Huang Rui <ray.huang@amd.com>
To: "Su, Jinzhou (Joe)" <Jinzhou.Su@amd.com>
Cc: "amd-gfx@lists.freedesktop.org" <amd-gfx@lists.freedesktop.org>
Subject: Re: [PATCH] drm/amdgpu: Add RLC_PG_DELAY_3 for Vangogh
Date: Wed, 20 Jan 2021 11:14:09 +0800 [thread overview]
Message-ID: <20210120031409.GB611756@hr-amd> (raw)
In-Reply-To: <20210120030911.32646-1-Jinzhou.Su@amd.com>
On Wed, Jan 20, 2021 at 11:09:11AM +0800, Su, Jinzhou (Joe) wrote:
> Driver should enable the CGPG feature for RLC in safe mode to
> prevent any misalignment or conflict in middle of any power
> feature entry/exit sequence.
> Achieved by setting RLC_PG_CNTL.GFX_POWER_GATING_ENABLE = 0x1,
> and RLC_PG_DELAY_3.CGCG_ACTIVE_BEFORE_CGPG to the desired CGPG
> hysteresis value in refclk count.
>
> Signed-off-by: Jinzhou Su <Jinzhou.Su@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> index c4314e25f560..dd102cc2516a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
> @@ -120,6 +120,7 @@
> #define mmSPI_CONFIG_CNTL_Vangogh_BASE_IDX 1
> #define mmGCR_GENERAL_CNTL_Vangogh 0x1580
> #define mmGCR_GENERAL_CNTL_Vangogh_BASE_IDX 0
> +#define RLC_PG_DELAY_3__CGCG_ACTIVE_BEFORE_CGPG_MASK_Vangogh 0x0000FFFFL
>
> #define mmCP_HYP_PFP_UCODE_ADDR 0x5814
> #define mmCP_HYP_PFP_UCODE_ADDR_BASE_IDX 1
> @@ -7829,6 +7830,20 @@ static void gfx_v10_cntl_power_gating(struct amdgpu_device *adev, bool enable)
> data &= ~RLC_PG_CNTL__GFX_POWER_GATING_ENABLE_MASK;
>
> WREG32_SOC15(GC, 0, mmRLC_PG_CNTL, data);
> +
> + /*
> + * CGPG enablement required and the register to program the hysteresis value
> + * RLC_PG_DELAY_3.CGCG_ACTIVE_BEFORE_CGPG to the desired CGPG hysteresis value
> + * in refclk count. Note that RLC FW is modified to take 16 bits from
> + * RLC_PG_DELAY_3[15:0] as the hysteresis instead of just 8 bits.
> + *
> + * The recommendation from RLC team is setting RLC_PG_DELAY_3 to 200us(0x4E20)
> + * as part of CGPG enablement starting point.
> + */
> + if (enable && (adev->pg_flags & AMD_PG_SUPPORT_GFX_PG) && adev->asic_type == CHIP_VANGOGH) {
> + data = 0x4E20 & RLC_PG_DELAY_3__CGCG_ACTIVE_BEFORE_CGPG_MASK_Vangogh;
> + WREG32_SOC15(GC, 0, mmRLC_PG_DELAY_3, data);
> + }
> }
>
> static void gfx_v10_cntl_pg(struct amdgpu_device *adev, bool enable)
> --
> 2.17.1
>
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next prev parent reply other threads:[~2021-01-20 3:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 3:09 [PATCH] drm/amdgpu: Add RLC_PG_DELAY_3 for Vangogh Jinzhou Su
2021-01-20 3:14 ` Huang Rui [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-01-19 10:48 Jinzhou Su
2021-01-19 14:08 ` Huang Rui
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