Hi Alexander,
On Wed, Oct 06, 2021 at 09:47:11AM +0200, Alexander Stein wrote:
> VCC needs to be enabled before releasing the enable GPIO.
>
> Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/bridge/ti-sn65dsi83.c | 15 ++++++++++++++-
> 1 file changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> index a32f70bc68ea..5fab0fabcd15 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
> @@ -33,6 +33,7 @@
> #include <linux/of_device.h>
> #include <linux/of_graph.h>
> #include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
>
> #include <drm/drm_atomic_helper.h>
> #include <drm/drm_bridge.h>
> @@ -143,6 +144,7 @@ struct sn65dsi83 {
> struct mipi_dsi_device *dsi;
> struct drm_bridge *panel_bridge;
> struct gpio_desc *enable_gpio;
> + struct regulator *vcc;
> int dsi_lanes;
> bool lvds_dual_link;
> bool lvds_dual_link_even_odd_swap;
> @@ -647,6 +649,12 @@ static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model)
>
> ctx->panel_bridge = panel_bridge;
>
> + ctx->vcc = devm_regulator_get(dev, "vcc");
In the binding the vcc regulator is required, but devm_regulator_get()
will create a dummy regulator if not found. Maybe this is on purpose and
all is good.
Sam
