Hi Fabrizio,
On Wed, Nov 13, 2019 at 03:51:25PM +0000, Fabrizio Castro wrote:
> Add support for transparent LVDS decoders by adding a new
> compatible string ("lvds-decoder") to the driver.
> This patch also adds member connector_type to struct lvds_codec,
> and that's because LVDS decoders have a different connector type
> from LVDS encoders. We fill this new member up with the data
> matching the compatible string.
>
> Signed-off-by: Fabrizio Castro <fabrizio.cas...@bp.renesas.com>
>
> ---
> v3->v4:
> * New patch
> ---
> drivers/gpu/drm/bridge/lvds-codec.c | 19 ++++++++++++++++---
> 1 file changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/lvds-codec.c
> b/drivers/gpu/drm/bridge/lvds-codec.c
> index b5801a2..c32e125 100644
> --- a/drivers/gpu/drm/bridge/lvds-codec.c
> +++ b/drivers/gpu/drm/bridge/lvds-codec.c
> @@ -7,6 +7,7 @@
> #include <linux/gpio/consumer.h>
> #include <linux/module.h>
> #include <linux/of.h>
> +#include <linux/of_device.h>
> #include <linux/of_graph.h>
> #include <linux/platform_device.h>
>
> @@ -17,6 +18,7 @@ struct lvds_codec {
> struct drm_bridge bridge;
> struct drm_bridge *panel_bridge;
> struct gpio_desc *powerdown_gpio;
> + u32 connector_type;
> };
>
> static int lvds_codec_attach(struct drm_bridge *bridge)
> @@ -65,6 +67,7 @@ static int lvds_codec_probe(struct platform_device *pdev)
> if (!lvds_codec)
> return -ENOMEM;
>
> + lvds_codec->connector_type = (u32)of_device_get_match_data(&pdev->dev);
I'm now getting a compilation failure here:
drivers/gpu/drm/bridge/lvds-codec.c: In function ‘lvds_codec_probe’:
drivers/gpu/drm/bridge/lvds-codec.c:68:31: error: cast from pointer to integer
of different size [-Werror=pointer-to-int-cast]
lvds_codec->connector_type = (u32)of_device_get_match_data(&pdev->dev);
^
The fix should be simple:
lvds_codec->connector_type = (uintptr_t)of_device_get_match_data(dev);
I'm bothered by the fact that I've compiled this before without any
issue, so this really puzzles me. Do you get the same warning ?
> lvds_codec->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown",
> GPIOD_OUT_HIGH);
> if (IS_ERR(lvds_codec->powerdown_gpio)) {
> @@ -105,7 +108,7 @@ static int lvds_codec_probe(struct platform_device *pdev)
>
> lvds_codec->panel_bridge =
> devm_drm_panel_bridge_add_typed(dev, panel,
> - DRM_MODE_CONNECTOR_LVDS);
> + lvds_codec->connector_type);
> if (IS_ERR(lvds_codec->panel_bridge))
> return PTR_ERR(lvds_codec->panel_bridge);
>
> @@ -133,8 +136,18 @@ static int lvds_codec_remove(struct platform_device
> *pdev)
> }
>
> static const struct of_device_id lvds_codec_match[] = {
> - { .compatible = "lvds-encoder" },
> - { .compatible = "thine,thc63lvdm83d" },
> + {
> + .compatible = "lvds-decoder",
> + .data = (void *)DRM_MODE_CONNECTOR_DPI,
> + },
> + {
> + .compatible = "lvds-encoder",
> + .data = (void *)DRM_MODE_CONNECTOR_LVDS,
> + },
> + {
> + .compatible = "thine,thc63lvdm83d",
> + .data = (void *)DRM_MODE_CONNECTOR_LVDS,
> + },
> {},
> };
> MODULE_DEVICE_TABLE(of, lvds_codec_match);
--
Regards,
Laurent Pinchart
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