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Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.0 Subject: Re: [PATCH 2/2] media: platform: mtk-mdp3: Use devicetree phandle to retrieve SCP Content-Language: en-US To: Chen-Yu Tsai Cc: wens@kernel.org, mchehab@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, matthias.bgg@gmail.com, moudy.ho@mediatek.com, hverkuil-cisco@xs4all.nl, sakari.ailus@linux.intel.com, u.kleine-koenig@pengutronix.de, linqiheng@huawei.com, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, kernel@collabora.com References: <20230919095938.70679-1-angelogioacchino.delregno@collabora.com> <20230919095938.70679-3-angelogioacchino.delregno@collabora.com> From: AngeloGioacchino Del Regno In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230919_032821_617520_E0BB0BBC X-CRM114-Status: GOOD ( 21.25 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Il 19/09/23 12:26, Chen-Yu Tsai ha scritto: > On Tue, Sep 19, 2023 at 6:24 PM AngeloGioacchino Del Regno > wrote: >> >> Il 19/09/23 12:21, Chen-Yu Tsai ha scritto: >>> On Tue, Sep 19, 2023 at 6:00 PM AngeloGioacchino Del Regno >>> wrote: >>>> >>>> Instead of walking the entire parent node for something that has the >>>> right compatible, use the scp_get() function provided by the MediaTek >>>> SCP remoteproc driver to retrieve a handle to mtk_scp through the >>>> devicetree "mediatek,scp" (phandle) property. >>>> >>>> In case of multi-core SCP, this also allows to select a specific core. >>>> >>>> Signed-off-by: AngeloGioacchino Del Regno >>>> --- >>>> .../media/platform/mediatek/mdp3/mtk-mdp3-core.c | 16 ++++++++++------ >>>> 1 file changed, 10 insertions(+), 6 deletions(-) >>>> >>>> diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c >>>> index 8677e7fd5083..d93d3833633e 100644 >>>> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c >>>> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c >>>> @@ -254,13 +254,17 @@ static int mdp_probe(struct platform_device *pdev) >>>> goto err_destroy_job_wq; >>>> } >>>> >>>> - mm_pdev = __get_pdev_by_id(pdev, NULL, MDP_INFRA_SCP); >>>> - if (WARN_ON(!mm_pdev)) { >>>> - dev_err(&pdev->dev, "Could not get scp device\n"); >>>> - ret = -ENODEV; >>>> - goto err_destroy_clock_wq; >>>> + mdp->scp = scp_get(pdev); >>>> + if (!mdp->scp) { >>>> + mm_pdev = __get_pdev_by_id(pdev, NULL, MDP_INFRA_SCP); >>>> + if (WARN_ON(!mm_pdev)) { >>>> + dev_err(&pdev->dev, "Could not get scp device\n"); >>>> + ret = -ENODEV; >>>> + goto err_destroy_clock_wq; >>>> + } >>>> + mdp->scp = platform_get_drvdata(mm_pdev); >>> >>> You need to keep the original code as a fallback for old device trees. >>> >> >> I haven't removed the original code, it *is* there as a fallback :-) >> >> mdp->scp = scp_get() <--- new >> if (!mdp->scp) { fallback } > > I see it now. I guess it's time to call it a day... I even replied with > the wrong email ... > > Reviewed-by: Chen-Yu Tsai hahaha! no worries, it happens :-) Thanks for the review btw. Cheers! Angelo > >>> ChenYu >>> >>>> } >>>> - mdp->scp = platform_get_drvdata(mm_pdev); >>>> + >>>> mdp->rproc_handle = scp_get_rproc(mdp->scp); >>>> dev_dbg(&pdev->dev, "MDP rproc_handle: %pK", mdp->rproc_handle); >>>> >>>> -- >>>> 2.42.0 >>>> >>> _______________________________________________ >>> Kernel mailing list -- kernel@mailman.collabora.com >>> To unsubscribe send an email to kernel-leave@mailman.collabora.com >> >>