Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752738AbbKPOqf (ORCPT ); Mon, 16 Nov 2015 09:46:35 -0500 Received: from fw-tnat.cambridge.arm.com ([217.140.96.140]:20608 "EHLO cam-smtp0.cambridge.arm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751682AbbKPOqB (ORCPT ); Mon, 16 Nov 2015 09:46:01 -0500 From: Liviu Dudau To: Russell King , Mark Yao , Heiko Stuebner , Philipp Zabel , Daniel Vetter , David Airlie , Eric Anholt Cc: linux-rockchip , LAKML , dri-devel , LKML Subject: [PATCH 1/2] drm: Improve drm_of_component_probe() to correctly handle ports and remote ports. Date: Mon, 16 Nov 2015 14:44:52 +0000 Message-Id: <1447685093-26129-2-git-send-email-Liviu.Dudau@arm.com> X-Mailer: git-send-email 2.6.0 In-Reply-To: <1447685093-26129-1-git-send-email-Liviu.Dudau@arm.com> References: <1447685093-26129-1-git-send-email-Liviu.Dudau@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4691 Lines: 122 Rockchip DRM driver cannot use the same compare_of() function to match ports and remote ports (aka encoders) as their OF sub-trees look different. Add a second compare function to be used when encoders are added to the component framework and patch the existing users of the function accordingly. Signed-off-by: Liviu Dudau --- drivers/gpu/drm/armada/armada_drv.c | 3 ++- drivers/gpu/drm/drm_of.c | 23 ++++++++++++++++++----- drivers/gpu/drm/imx/imx-drm-core.c | 3 ++- include/drm/drm_of.h | 6 ++++-- 4 files changed, 26 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c index 77ab93d..3a2a929 100644 --- a/drivers/gpu/drm/armada/armada_drv.c +++ b/drivers/gpu/drm/armada/armada_drv.c @@ -274,7 +274,8 @@ static int armada_drm_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; int ret; - ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); + ret = drm_of_component_probe(dev, compare_dev_name, compare_dev_name, + &armada_master_ops); if (ret != -EINVAL) return ret; diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 493c05c..58fafd7 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -77,7 +77,8 @@ EXPORT_SYMBOL(drm_of_find_possible_crtcs); * Returns zero if successful, or one of the standard error codes if it fails. */ int drm_of_component_probe(struct device *dev, - int (*compare_of)(struct device *, void *), + int (*compare_port)(struct device *, void *), + int (*compare_encoder)(struct device *, void *), const struct component_master_ops *m_ops) { struct device_node *ep, *port, *remote; @@ -101,8 +102,14 @@ int drm_of_component_probe(struct device *dev, continue; } - component_match_add(dev, &match, compare_of, port); - of_node_put(port); + component_match_add(dev, &match, compare_port, port); + /* + * component_match_add keeps a reference to the port + * variable but does not do proper reference counting, + * so we cannot release the reference here. If that + * gets fixed, the following line should be uncommented + */ + /* of_node_put(port); */ } if (i == 0) { @@ -140,8 +147,14 @@ int drm_of_component_probe(struct device *dev, continue; } - component_match_add(dev, &match, compare_of, remote); - of_node_put(remote); + component_match_add(dev, &match, compare_encoder, remote); + /* + * component_match_add keeps a reference to the port + * variable but does not do proper reference counting, + * so we cannot release the reference here. If that + * gets fixed, the following line should be uncommented + */ + /* of_node_put(remote); */ } of_node_put(port); } diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c index 64f16ea..0d36410 100644 --- a/drivers/gpu/drm/imx/imx-drm-core.c +++ b/drivers/gpu/drm/imx/imx-drm-core.c @@ -531,7 +531,8 @@ static const struct component_master_ops imx_drm_ops = { static int imx_drm_platform_probe(struct platform_device *pdev) { - int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops); + int ret = drm_of_component_probe(&pdev->dev, compare_of, compare_of, + &imx_drm_ops); if (!ret) ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h index 8544665..1c29e42 100644 --- a/include/drm/drm_of.h +++ b/include/drm/drm_of.h @@ -10,7 +10,8 @@ struct device_node; extern uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, struct device_node *port); extern int drm_of_component_probe(struct device *dev, - int (*compare_of)(struct device *, void *), + int (*compare_port)(struct device *, void *), + int (*compare_encoder)(struct device *, void *), const struct component_master_ops *m_ops); #else static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, @@ -21,7 +22,8 @@ static inline uint32_t drm_of_find_possible_crtcs(struct drm_device *dev, static inline int drm_of_component_probe(struct device *dev, - int (*compare_of)(struct device *, void *), + int (*compare_port)(struct device *, void *), + int (*compare_encoder)(struct device *, void *), const struct component_master_ops *m_ops) { return -EINVAL; -- 2.6.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/