Hi Marek.
On Sat, Oct 03, 2020 at 01:08:23AM +0200, Marek Vasut wrote:
> The OnSemi FIN3385 Parallel-to-LVDS encoder has a dedicated input line to
> select input pixel data sampling edge. Add DT property "pixelclk-active",
> same as the one used by display timings, and configure bus flags based on
> this DT property.
Why is it that this information cannot come from the panel driver?
The property tell when data are sampled and the FIN3385 Parallel-to-LVDS
is the one that transmit the data - not then one that samples the data.
Correct?
Sam
>
> Signed-off-by: Marek Vasut <marex@xxxxxxx>
> Cc: Alexandre Torgue <alexandre.torgue@xxxxxx>
> Cc: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
> Cc: Antonio Borneo <antonio.borneo@xxxxxx>
> Cc: Benjamin Gaignard <benjamin.gaignard@xxxxxx>
> Cc: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
> Cc: Philippe Cornu <philippe.cornu@xxxxxx>
> Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Cc: Vincent Abriou <vincent.abriou@xxxxxx>
> Cc: Yannick Fertre <yannick.fertre@xxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-stm32@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
> To: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> ---
> drivers/gpu/drm/bridge/lvds-codec.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/lvds-codec.c b/drivers/gpu/drm/bridge/lvds-codec.c
> index f52ccffc1bd1..bc941d4fb5b9 100644
> --- a/drivers/gpu/drm/bridge/lvds-codec.c
> +++ b/drivers/gpu/drm/bridge/lvds-codec.c
> @@ -19,6 +19,7 @@ struct lvds_codec {
> struct device *dev;
> struct drm_bridge bridge;
> struct drm_bridge *panel_bridge;
> + struct drm_bridge_timings timings;
> struct regulator *vcc;
> struct gpio_desc *powerdown_gpio;
> u32 connector_type;
> @@ -80,6 +81,7 @@ static int lvds_codec_probe(struct platform_device *pdev)
> struct device_node *panel_node;
> struct drm_panel *panel;
> struct lvds_codec *lvds_codec;
> + u32 val;
> int ret;
>
> lvds_codec = devm_kzalloc(dev, sizeof(*lvds_codec), GFP_KERNEL);
> @@ -124,6 +126,12 @@ static int lvds_codec_probe(struct platform_device *pdev)
> if (IS_ERR(lvds_codec->panel_bridge))
> return PTR_ERR(lvds_codec->panel_bridge);
>
> + if (!of_property_read_u32(dev->of_node, "pixelclk-active", &val)) {
> + lvds_codec->timings.input_bus_flags = val ?
> + DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE :
> + DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE;
> + }
> +
> /*
> * The panel_bridge bridge is attached to the panel's of_node,
> * but we need a bridge attached to our of_node for our user
> @@ -131,6 +139,7 @@ static int lvds_codec_probe(struct platform_device *pdev)
> */
> lvds_codec->bridge.of_node = dev->of_node;
> lvds_codec->bridge.funcs = &funcs;
> + lvds_codec->bridge.timings = &lvds_codec->timings;
> drm_bridge_add(&lvds_codec->bridge);
>
> platform_set_drvdata(pdev, lvds_codec);
> --
> 2.28.0
>
> _______________________________________________
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> dri-devel@xxxxxxxxxxxxxxxxxxxxx
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