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Mon, 16 Dec 2024 16:40:49 -0800 (PST) From: Dmitry Baryshkov Date: Tue, 17 Dec 2024 02:40:31 +0200 Subject: [PATCH v7 09/10] drm/vc4: hdmi: stop rereading EDID in get_modes() MIME-Version: 1.0 Message-Id: <20241217-drm-bridge-hdmi-connector-v7-9-cb9df2b6a515@linaro.org> References: <20241217-drm-bridge-hdmi-connector-v7-0-cb9df2b6a515@linaro.org> In-Reply-To: <20241217-drm-bridge-hdmi-connector-v7-0-cb9df2b6a515@linaro.org> To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jaroslav Kysela , Takashi Iwai , Liam Girdwood , Mark Brown , Phong LE , Inki Dae , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Alim Akhtar , Russell King , Chun-Kuang Hu , Philipp Zabel , Matthias Brugger , AngeloGioacchino Del Regno , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Andy Yan , Alain Volmat , Raphael Gallais-Pou , Dave Stevenson , =?utf-8?q?Ma=C3=ADra_Cana?= =?utf-8?q?l?= , Raspberry Pi Kernel Maintenance Cc: Jani Nikula , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1884; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=Pn3jlKOdfQqOhTgwlNovK0Mjhw+ujx5JcQ8ESvBRcTY=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnYMh5AcX6vqsmyTSEOah3v/NRfb59bBLsVA0Am 5PF/UeNbMuJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ2DIeQAKCRCLPIo+Aiko 1UYkB/4nmHMFle4w74ujOB7redDUAjj366h2sS6n0SYJQS5bY63lKUrcybdCpnPcp6IQgM7zPJT KI3Zu9Z+K2ZvACjsEqw5/l2aXc0xEcmWTAKox52w1HpK+mxERTYSNrKnEpHylqTK2aOcQrkwpGb 90JB3CO4lyUmqID7sOLHsfS3eqBnYJiWYmplzScjqHDslUzYcE6rjuZaD3MtRPP2RLHo2S1yGht YfwBKu2NZ6YKX0LN9PAhJb6RXOuJ0S37kgoycJB4XyXb/p3yPs0dM1IhItwoki1nGLfBOB3xKEY EjldH/ijsNmTlfSrYitzNGnCyz43NBBdHpkVVJnf44FwvI7z X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241216_164052_591454_E522A2CC X-CRM114-Status: GOOD ( 14.39 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The vc4_hdmi_connector_detect_ctx() via vc4_hdmi_handle_hotplug() already reads EDID and propagates it to the drm_connector. Stop rereading EDID as a part of the .get_modes() callback and just update the list of modes. This matches the behaviour of the i915 driver. Signed-off-by: Dmitry Baryshkov Acked-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_hdmi.c | 21 --------------------- 1 file changed, 21 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 2a2aca7017994779a7163935df3fc87ca312d6dd..bb5e8738845c74d975c1e0e1262ced46e4ef8fde 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -470,31 +470,10 @@ static int vc4_hdmi_connector_detect_ctx(struct drm_connector *connector, static int vc4_hdmi_connector_get_modes(struct drm_connector *connector) { - struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector); struct vc4_dev *vc4 = to_vc4_dev(connector->dev); - const struct drm_edid *drm_edid; int ret = 0; - /* - * NOTE: This function should really take vc4_hdmi->mutex, but doing so - * results in reentrancy issues since cec_s_phys_addr() might call - * .adap_enable, which leads to that funtion being called with our mutex - * held. - * - * Concurrency isn't an issue at the moment since we don't share - * any state with any of the other frameworks so we can ignore - * the lock for now. - */ - - drm_edid = drm_edid_read_ddc(connector, vc4_hdmi->ddc); - drm_edid_connector_update(connector, drm_edid); - cec_s_phys_addr(vc4_hdmi->cec_adap, - connector->display_info.source_physical_address, false); - if (!drm_edid) - return 0; - ret = drm_edid_connector_add_modes(connector); - drm_edid_free(drm_edid); if (!vc4->hvs->vc5_hdmi_enable_hdmi_20) { struct drm_device *drm = connector->dev;