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Fri, 24 Sep 2021 11:23:46 -0400 (EDT) From: Maxime Ripard To: Maarten Lankhorst , Thomas Zimmermann , Maxime Ripard , Daniel Vetter , David Airlie Cc: Linus Torvalds , linux-rpi-kernel@lists.infradead.org, Florian Fainelli , Nicolas Saenz Julienne , linux-arm-kernel@lists.infradead.org, Nathan Chancellor , Randy Dunlap , Stephen Rothwell Subject: [PATCH v2] drm/vc4: Unselect PM Date: Fri, 24 Sep 2021 17:23:34 +0200 Message-Id: <20210924152334.1342630-1-maxime@cerno.tech> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210924_082354_245040_07D42DC2 X-CRM114-Status: GOOD ( 16.29 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org It turns out we can't select PM when allowing the compilation for COMPILE_TEST. Indeed, PM might not be defined at all, or come with extra requirements we can't meet. This select was initially introduced since we need to call the vc4_hdmi_runtime_resume() at probe time to make sure our device is properly powered at bind time, no matter whether PM is there or not, and we needed to make sure we didn't have a defined but not used warning for vc4_hdmi_runtime_suspend(). This will still happen on platforms that don't define PM though, since SET_RUNTIME_PM_OPS will then be a nop. In order to fix both issues, let's remove the select, and add a __maybe_unused attribute to vc4_hdmi_runtime_resume(). Reported-by: Randy Dunlap Signed-off-by: Maxime Ripard --- I'm not sure how to merge this one, since this commit has been reverted in Linus tree, and un-reverted in linux-next. Should we wait a bit until the reworked version of the original commit has been merged again? Maxime Changes from v1: - remove select - add __maybe_unused to vc4_hdmi_runtime_resume - reword the commit log --- drivers/gpu/drm/vc4/Kconfig | 1 - drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +- 2 files changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/gpu/drm/vc4/Kconfig b/drivers/gpu/drm/vc4/Kconfig index 52a1c309cb4a..345a5570a3da 100644 --- a/drivers/gpu/drm/vc4/Kconfig +++ b/drivers/gpu/drm/vc4/Kconfig @@ -9,7 +9,6 @@ config DRM_VC4 select DRM_KMS_CMA_HELPER select DRM_GEM_CMA_HELPER select DRM_PANEL_BRIDGE - select PM select SND_PCM select SND_PCM_ELD select SND_SOC_GENERIC_DMAENGINE_PCM diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 500cdd56b335..1f2690ed8542 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -2122,7 +2122,7 @@ static int vc5_hdmi_init_resources(struct vc4_hdmi *vc4_hdmi) return 0; } -static int vc4_hdmi_runtime_suspend(struct device *dev) +static int __maybe_unused vc4_hdmi_runtime_suspend(struct device *dev) { struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev); -- 2.31.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel