linux-kernel - Re: [PATCH v2 1/2] Revert "Revert "drm/bridge: ti-sn65dsi86: Implement bridge connector operations for DP""

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Message-ID: <YyhH0cENOBZfeu64@pendragon.ideasonboard.com>
Date:   Mon, 19 Sep 2022 13:43:29 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Robert Foss <robert.foss@...aro.org>
Cc:     andrzej.hajda@...el.com, narmstrong@...libre.com, jonas@...boo.se,
        jernej.skrabec@...il.com, airlied@...ux.ie, daniel@...ll.ch,
        dianders@...omium.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org,
        Chris Morgan <macromorgan@...mail.com>,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 1/2] Revert "Revert "drm/bridge: ti-sn65dsi86:
 Implement bridge connector operations for DP""

Hi Rob,

Thank you for the patch.

On Mon, Sep 19, 2022 at 12:20:08PM +0200, Robert Foss wrote:
> This commit was accidentally reverted instead of another commit, and
> therefore needs to be reinstated.
> 
> This reverts commit 8c9c40ec83445b188fb6b59e119bf5c2de81b02d.
> 
> Fixes: 8c9c40ec8344 ("Revert "drm/bridge: ti-sn65dsi86: Implement bridge connector operations for DP"")
> Signed-off-by: Robert Foss <robert.foss@...aro.org>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
>  drivers/gpu/drm/bridge/ti-sn65dsi86.c | 28 +++++++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> index 6e053e2af229..3c3561942eb6 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> @@ -29,6 +29,7 @@
>  #include <drm/drm_atomic_helper.h>
>  #include <drm/drm_bridge.h>
>  #include <drm/drm_bridge_connector.h>
> +#include <drm/drm_edid.h>
>  #include <drm/drm_mipi_dsi.h>
>  #include <drm/drm_of.h>
>  #include <drm/drm_panel.h>
> @@ -68,6 +69,7 @@
>  #define  BPP_18_RGB				BIT(0)
>  #define SN_HPD_DISABLE_REG			0x5C
>  #define  HPD_DISABLE				BIT(0)
> +#define  HPD_DEBOUNCED_STATE			BIT(4)
>  #define SN_GPIO_IO_REG				0x5E
>  #define  SN_GPIO_INPUT_SHIFT			4
>  #define  SN_GPIO_OUTPUT_SHIFT			0
> @@ -1158,10 +1160,33 @@ static void ti_sn_bridge_atomic_post_disable(struct drm_bridge *bridge,
>  	pm_runtime_put_sync(pdata->dev);
>  }
>  
> +static enum drm_connector_status ti_sn_bridge_detect(struct drm_bridge *bridge)
> +{
> +	struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
> +	int val = 0;
> +
> +	pm_runtime_get_sync(pdata->dev);
> +	regmap_read(pdata->regmap, SN_HPD_DISABLE_REG, &val);
> +	pm_runtime_put_autosuspend(pdata->dev);
> +
> +	return val & HPD_DEBOUNCED_STATE ? connector_status_connected
> +					 : connector_status_disconnected;
> +}
> +
> +static struct edid *ti_sn_bridge_get_edid(struct drm_bridge *bridge,
> +					  struct drm_connector *connector)
> +{
> +	struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
> +
> +	return drm_get_edid(connector, &pdata->aux.ddc);
> +}
> +
>  static const struct drm_bridge_funcs ti_sn_bridge_funcs = {
>  	.attach = ti_sn_bridge_attach,
>  	.detach = ti_sn_bridge_detach,
>  	.mode_valid = ti_sn_bridge_mode_valid,
> +	.get_edid = ti_sn_bridge_get_edid,
> +	.detect = ti_sn_bridge_detect,
>  	.atomic_pre_enable = ti_sn_bridge_atomic_pre_enable,
>  	.atomic_enable = ti_sn_bridge_atomic_enable,
>  	.atomic_disable = ti_sn_bridge_atomic_disable,
> @@ -1257,6 +1282,9 @@ static int ti_sn_bridge_probe(struct auxiliary_device *adev,
>  	pdata->bridge.type = pdata->next_bridge->type == DRM_MODE_CONNECTOR_DisplayPort
>  			   ? DRM_MODE_CONNECTOR_DisplayPort : DRM_MODE_CONNECTOR_eDP;
>  
> +	if (pdata->bridge.type == DRM_MODE_CONNECTOR_DisplayPort)
> +		pdata->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_DETECT;
> +
>  	drm_bridge_add(&pdata->bridge);
>  
>  	ret = ti_sn_attach_host(pdata);

-- 
Regards,

Laurent Pinchart