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[46.138.43.24]) by smtp.googlemail.com with ESMTPSA id y13sm266895ljj.33.2021.12.22.11.48.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 22 Dec 2021 11:48:41 -0800 (PST) Subject: Re: [PATCH 1/2] drm/tegra: dpaux: Populate AUX bus To: Thierry Reding Cc: Thomas Graichen , Douglas Anderson , Laurent Pinchart , Jon Hunter , dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org References: <20211220104855.428290-1-thierry.reding@gmail.com> <20211220104855.428290-2-thierry.reding@gmail.com> From: Dmitry Osipenko Message-ID: <707ee652-2a68-9d09-b65d-95b670576298@gmail.com> Date: Wed, 22 Dec 2021 22:48:41 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <20211220104855.428290-2-thierry.reding@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org 20.12.2021 13:48, Thierry Reding пишет: > From: Thierry Reding > > The DPAUX hardware block exposes an DP AUX interface that provides > access to an AUX bus and the devices on that bus. Use the DP AUX bus > infrastructure that was recently introduced to probe devices on this > bus from DT. > > Signed-off-by: Thierry Reding > --- > drivers/gpu/drm/tegra/Kconfig | 1 + > drivers/gpu/drm/tegra/dpaux.c | 7 +++++++ > 2 files changed, 8 insertions(+) > > diff --git a/drivers/gpu/drm/tegra/Kconfig b/drivers/gpu/drm/tegra/Kconfig > index 8cf5aeb9db6c..201f5175ecfe 100644 > --- a/drivers/gpu/drm/tegra/Kconfig > +++ b/drivers/gpu/drm/tegra/Kconfig > @@ -5,6 +5,7 @@ config DRM_TEGRA > depends on COMMON_CLK > depends on DRM > depends on OF > + select DRM_DP_AUX_BUS > select DRM_KMS_HELPER > select DRM_MIPI_DSI > select DRM_PANEL > diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c > index 1f96e416fa08..9da1edcdc835 100644 > --- a/drivers/gpu/drm/tegra/dpaux.c > +++ b/drivers/gpu/drm/tegra/dpaux.c > @@ -18,6 +18,7 @@ > #include > #include > > +#include > #include > #include > > @@ -570,6 +571,12 @@ static int tegra_dpaux_probe(struct platform_device *pdev) > list_add_tail(&dpaux->list, &dpaux_list); > mutex_unlock(&dpaux_lock); > > + err = devm_of_dp_aux_populate_ep_devices(&dpaux->aux); > + if (err < 0) { > + dev_err(dpaux->dev, "failed to populate AUX bus: %d\n", err); > + return err; > + } > + > return 0; > } Needs stable tag for 5.15+.