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Fri, 20 Dec 2024 11:17:24 -0800 (PST) From: Dmitry Baryshkov Date: Fri, 20 Dec 2024 21:17:06 +0200 Subject: [PATCH v8 09/10] drm/vc4: hdmi: stop rereading EDID in get_modes() Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241220-drm-bridge-hdmi-connector-v8-9-2399dbae2990@linaro.org> References: <20241220-drm-bridge-hdmi-connector-v8-0-2399dbae2990@linaro.org> In-Reply-To: <20241220-drm-bridge-hdmi-connector-v8-0-2399dbae2990@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=1990; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=zd/Y8mBxMdBApDi5CzqJHH1RW7mj7RyJYMvyUl/+gqU=; b=owGbwMvMwMXYbdNlx6SpcZXxtFoSQ3rqofWGWfG2miK9Nk/kt60LsekVXBu+uC1vw6n5PZ3JJ /mC567uZDRmYWDkYpAVU2TxKWiZGrMpOezDjqn1MINYmUCmMHBxCsBE7E6y/w9W9tSe7sVjbvzR 8FBbRt5itZZTS70/l66Un94pOkuWwdH5lK71svhJ7IVTW8v/1E+7um8Oq/SHghieD8s8E36nX22 dYGtvPbPjkG758bt7Azk9c/X7bd+um6nE2PPeUjfWRN2Gr2P7Ce30e0Wr4+6KWfuXijlJxD0qzG gT5extinq5dKNmBvuX+iVXf9esOtz1siHufcyqFG19p2yZy68X5z4IvpRutuFxufLa2D/85/sCA 7/nH2SZf2G25Ulhz2zR7KP7F0Y3i/VcX1Jt2vEozPjs6pcbPiy4kXkuZvpnPaknzj3r2nPNcl0t rX6qH1qxql3BNHpX5armvlVFP34LG4pxvVDZeeS+x+2ZAA== X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A 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. Acked-by: Maxime Ripard Tested-by: Dave Stevenson Signed-off-by: Dmitry Baryshkov --- 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 24199b511f2ee1bc3aa5f4a30e9d3d928d556ff1..5282dd765cc9478361a705dca85f615015b12e8e 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;