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Date: Mon, 22 Feb 2016 11:51:47 +0000
From: Liviu Dudau <Liviu.Dudau@....com>
To: Russell King <rmk+kernel@....linux.org.uk>,
Mark Yao <mark.yao@...k-chips.com>,
Heiko Stübner <heiko@...ech.de>,
Philipp Zabel <p.zabel@...gutronix.de>,
Daniel Vetter <daniel.vetter@...ll.ch>,
David Airlie <airlied@...ux.ie>, Eric Anholt <eric@...olt.net>
Cc: linux-rockchip <linux-rockchip@...ts.infradead.org>,
LAKML <linux-arm-kernel@...ts.infradead.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] drm: Improve drm_of_component_probe() to
correctly handle ports and remote ports.
On Fri, Nov 20, 2015 at 02:22:04PM +0000, Liviu Dudau wrote:
> 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 <Liviu.Dudau@....com>
Russell,
Resurecting this old patch from around Christmas time (bad time for patch review).
Are you happy enough with this version to re-issue the Ack or do you think I still
need to work on it?
Best regards,
Liviu
> ---
> drivers/gpu/drm/armada/armada_drv.c | 3 ++-
> drivers/gpu/drm/drm_of.c | 19 ++++++++++++++-----
> drivers/gpu/drm/imx/imx-drm-core.c | 3 ++-
> include/drm/drm_of.h | 6 ++++--
> 4 files changed, 22 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..34589d3 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 +102,12 @@ 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, so we need to keep the reference count
> + * increment from of_parse_phandle()
> + */
> }
>
> if (i == 0) {
> @@ -140,8 +145,12 @@ 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, so we need to keep the reference count
> + * increment from of_graph_get_remote_port_parent()
> + */
> }
> 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;
> --
> 2.6.2
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
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