From: Greg KH <greg@kroah.com>
To: Melissa Wen <mwen@igalia.com>
Cc: stable@vger.kernel.org, Alex Deucher <alexander.deucher@amd.com>
Subject: Re: [PATCH 5.10.y] drm/amd/display: enable cursor degamma for DCN3+ DRM legacy gamma
Date: Wed, 20 Sep 2023 13:13:03 +0200 [thread overview]
Message-ID: <2023092056-parrot-angular-6156@gregkh> (raw)
In-Reply-To: <20230919165936.1256007-1-mwen@igalia.com>
On Tue, Sep 19, 2023 at 03:59:36PM -0100, Melissa Wen wrote:
> For DRM legacy gamma, AMD display manager applies implicit sRGB degamma
> using a pre-defined sRGB transfer function. It works fine for DCN2
> family where degamma ROM and custom curves go to the same color block.
> But, on DCN3+, degamma is split into two blocks: degamma ROM for
> pre-defined TFs and `gamma correction` for user/custom curves and
> degamma ROM settings doesn't apply to cursor plane. To get DRM legacy
> gamma working as expected, enable cursor degamma ROM for implict sRGB
> degamma on HW with this configuration.
>
> Cc: stable@vger.kernel.org
> Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2803
> Fixes: 96b020e2163f ("drm/amd/display: check attr flag before set cursor degamma on DCN3+")
> Signed-off-by: Melissa Wen <mwen@igalia.com>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> (cherry picked from commit 57a943ebfcdb4a97fbb409640234bdb44bfa1953)
> Signed-off-by: Melissa Wen <mwen@igalia.com>
> ---
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
Both now queued up, thanks.
greg k-h
prev parent reply other threads:[~2023-09-20 11:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-16 12:24 FAILED: patch "[PATCH] drm/amd/display: enable cursor degamma for DCN3+ DRM legacy" failed to apply to 5.10-stable tree gregkh
2023-09-19 16:59 ` [PATCH 5.10.y] drm/amd/display: enable cursor degamma for DCN3+ DRM legacy gamma Melissa Wen
2023-09-20 11:13 ` Greg KH [this message]
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