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Thu, 14 May 2020 10:08:11 +0000 (GMT) From: Marek Szyprowski To: dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH] drm/exynos: mixer: Fix enabling of the runtime power management Date: Thu, 14 May 2020 12:08:12 +0200 Message-Id: <20200514100812.17043-1-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrMIsWRmVeSWpSXmKPExsWy7djP87o9EnvjDNZdl7G4te4cq8XGGetZ La58fc9mMen+BBaLGef3MVmsPXKX3WLG5JdsDuwe97uPM3n0bVnF6PF5k1wAcxSXTUpqTmZZ apG+XQJXxqYVKQX3OSquvnrO0sC4ib2LkZNDQsBEYvaXZSxdjFwcQgIrGCVuTrjICuF8YZTo PPcCyvnMKHFg6zY2mJZJT9aygNhCAssZJZ5/TITrmLPtETNIgk3AUKLrbRdYg4iAm0TT4Zlg k5gFrjNKfPuxCGy5sECQxKJlHWANLAKqEu9XnGXqYuTg4BWwlVj0LgRimbzE6g0HmCHsI2wS sy/mQtguEs3vDjNC2MISr45vgfpHRuL05B6wfyQEmhklHp5byw7h9DBKXG6aAdVhLXHn3C82 kGXMApoS63fpQ4QdJdbPv8cIEpYQ4JO48VYQJMwMZE7aNp0ZIswr0dEmBFGtJjHr+Dq4tQcv XII600PiesttVkj4xEq0dp1gmsAoNwth1wJGxlWM4qmlxbnpqcXGeanlesWJucWleel6yfm5 mxiBUX/63/GvOxj3/Uk6xCjAwajEw/vg+u44IdbEsuLK3EOMEhzMSiK8fuuBQrwpiZVVqUX5 8UWlOanFhxilOViUxHmNF72MFRJITyxJzU5NLUgtgskycXBKNTDuFqhctCjxstmTGT8e71WM PB8X9JPP0NdnwmHr5tPPbWsz/Sakre/v+LZu4YdW8b6+xjUPHde9d4z9ZfNnEZO46tNrabvO X+o69N88nuHdZt5mMwsTYzWxyZ07K5N1D29Zo3u5If7xcknj/1naYVv8lUs+S0hYb3I7xFpY L8QV5rWR2XyWyHclluKMREMt5qLiRABDt4S19gIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrJLMWRmVeSWpSXmKPExsVy+t/xu7o9EnvjDJ5NZba4te4cq8XGGetZ La58fc9mMen+BBaLGef3MVmsPXKX3WLG5JdsDuwe97uPM3n0bVnF6PF5k1wAc5SeTVF+aUmq QkZ+cYmtUrShhZGeoaWFnpGJpZ6hsXmslZGpkr6dTUpqTmZZapG+XYJexqYVKQX3OSquvnrO 0sC4ib2LkZNDQsBEYtKTtSxdjFwcQgJLGSWaNs5khkjISJyc1sAKYQtL/LnWxQZiCwl8YpR4 MoEPxGYTMJToegsRFxHwkGj+dpwdZBCzwG1GiaUf5rGAJIQFAiQ+LTgBZrMIqEq8X3GWqYuR g4NXwFZi0bsQiPnyEqs3HGCewMizgJFhFaNIamlxbnpusZFecWJucWleul5yfu4mRmCwbTv2 c8sOxq53wYcYBTgYlXh4LW7tjhNiTSwrrsw9xCjBwawkwuu3HijEm5JYWZValB9fVJqTWnyI 0RRo90RmKdHkfGAk5JXEG5oamltYGpobmxubWSiJ83YIHIwREkhPLEnNTk0tSC2C6WPi4JRq YJSU2pFySILvUpbhwZjon9bL/rXf38YoE9+UL3aB51fCsvc/KwMvTI+6dMTipZKamfudGBM5 jivft8/K7+T6eC77po1JUkZH0P57CdZ8Vt97a+UaDjs1KnwT/WFq5zvv4I+CaBNHjYd/JV23 R/hqpgUu4IgQ0+zsNmO8ubSzrqFIZYpzQF68EktxRqKhFnNRcSIAVtJokkwCAAA= X-CMS-MailID: 20200514100812eucas1p1d42ad25e93858a4bc801049f93f58250 X-Msg-Generator: CA X-RootMTR: 20200514100812eucas1p1d42ad25e93858a4bc801049f93f58250 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200514100812eucas1p1d42ad25e93858a4bc801049f93f58250 References: X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrzej Hajda , Bartlomiej Zolnierkiewicz , Seung-Woo Kim , Marek Szyprowski MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Runtime power management is essential for the Exynos Mixer driver operation. It should be enabled before adding its DRM component, because in some cases (when deferred probe takes place due to the IOMMU availability) the DRM driver might be initialized directly from the Mixer's component_add() call, what results in starting the driver operation without enabling the runtime power management. Signed-off-by: Marek Szyprowski --- drivers/gpu/drm/exynos/exynos_mixer.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) -- 2.17.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index ffbf4a950f69..829d2ce7560d 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -1200,9 +1200,11 @@ static int mixer_probe(struct platform_device *pdev) platform_set_drvdata(pdev, ctx); + pm_runtime_enable(dev); + ret = component_add(&pdev->dev, &mixer_component_ops); - if (!ret) - pm_runtime_enable(dev); + if (ret) + pm_runtime_disable(dev); return ret; }