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Fri, 16 Apr 2021 02:27:42 -0700 (PDT) From: Neil Armstrong To: jonas@kwiboo.se, jernej.skrabec@siol.net, robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com Cc: dri-devel@lists.freedesktop.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Neil Armstrong Subject: [PATCH 1/2] drm/bridge/synopsys: dw-hdmi: Add an option to suppress loading CEC driver Date: Fri, 16 Apr 2021 11:27:36 +0200 Message-Id: <20210416092737.1971876-2-narmstrong@baylibre.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210416092737.1971876-1-narmstrong@baylibre.com> References: <20210416092737.1971876-1-narmstrong@baylibre.com> MIME-Version: 1.0 X-Patch-Hashes: v=1; h=sha256; i=Y2Kp96dW3X0U27vNrMM/XkOOWYrIUuOu1Mi+zc7UuTs=; m=8YzxMzRM2R/oOFCOZbnFjWww/0CRXwSKJOS10A7bahU=; p=In2Hgqc+nqwSrOrGnpYjxqY39B1rnskpZvUG56iaipo=; g=1623597293b4caa25ab43c3fbd39773cfca1dd42 X-Patch-Sig: m=pgp; i=narmstrong@baylibre.com; s=0xA4CFF8AE; b=iQIzBAABCgAdFiEEPVPGJshWBf4d9CyLd9zb2sjISdEFAmB5WDgACgkQd9zb2sjISdF0zxAAsPF S9X840FovT4celkzqEHde6wQVRpNvUWE4KfpsyuthouG4Ogh7m+mtKyMmMmQER6NI98m6UNn3Xbw5 Qx99KHfaJJIDzeVKrURJGlExHSEpMuPeHdJ0RAe7bLK9WQEQPtzxAOjV6Fv1laxc0C3c0dOfy8vr4 JZX5oSKvz9oZ6X4ORBzl2Ighs0m1oNE6+fVDA/Go3PF9hK75cBWYIkms1I+K8tbvzEzZ/qZHYkJMM 7MdZj+Z8QXTj3HtlH0D3/Ir+WsE8g6vWtPbpiCYZQN20Qba8AIbNzlVgl5W4Bp9Ui+L/fbej+SOpF aEBcnw6wNLiKHAL3TxQDO8vkBR+JtaUespcIgE+/lqPeRJ7hsAfbsopzmkOz7kY6HCLvbAKtSlZbZ DhO86B1AKA7zjpTtuW+LijHIpzcK4kY7MRwuh+pFxFjOUv35K25z56vjnxJmLjo6zKyuhDR6WiFAY gscXpmhObHHjk36uTWeTJr87NINY7CH0pBu9ZFSzSp01gkLMx4phDLjm0+JayYtEWb3C4TQ7JEMT6 83Pdk0v0cAmx9Zef/LH5+R5kpZDsDpIJ7MeGQOrHUqbzKJF7K9EFKhDwaxXbSJKhCaEp+AKawxo1e xNymIxJyVDqU92s+pABPeTAYzotm3k9rcTGAjvOMAJe4zZlBjgZxL2N8piBFhgP8= Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jernej Skrabec This adds DW-HDMI driver a glue option to disable loading of the CEC sub-driver. On some SoCs, the CEC functionality is enabled in the IP config bits, but the CEC bus is non-functional like on Amlogic SoCs, where the CEC config bit is set but the DW-HDMI CEC signal is not connected to a physical pin, leading to some confusion when the DW-HDMI CEC controller can't communicate on the bus. Reviewed-by: Neil Armstrong Signed-off-by: Jernej Skrabec Signed-off-by: Neil Armstrong --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 2 +- include/drm/bridge/dw_hdmi.h | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index dda4fa9a1a08..ae97513ef886 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -3421,7 +3421,7 @@ struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev, hdmi->audio = platform_device_register_full(&pdevinfo); } - if (config0 & HDMI_CONFIG0_CEC) { + if (!plat_data->disable_cec && (config0 & HDMI_CONFIG0_CEC)) { cec.hdmi = hdmi; cec.ops = &dw_hdmi_cec_ops; cec.irq = irq; diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h index ea34ca146b82..6a5716655619 100644 --- a/include/drm/bridge/dw_hdmi.h +++ b/include/drm/bridge/dw_hdmi.h @@ -153,6 +153,8 @@ struct dw_hdmi_plat_data { const struct dw_hdmi_phy_config *phy_config; int (*configure_phy)(struct dw_hdmi *hdmi, void *data, unsigned long mpixelclock); + + unsigned int disable_cec : 1; }; struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev, -- 2.25.1