[PATCH] drm/client: Detect when ACPI lid is closed during initialization

[Alex Deucher]

On Mon, May 27, 2024 at 10:32 AM Mario Limonciello
<mario.limonciello at amd.com> wrote:
>
> If the lid on a laptop is closed when eDP connectors are populated
> then it remains enabled when the initial framebuffer configuration
> is built.
>
> When creating the initial framebuffer configuration detect the ACPI
> lid status and if it's closed disable any eDP connectors.
>
> Suggested-by: Alex Deucher <alexander.deucher at amd.com>
> Reported-by: Chris Bainbridge <chris.bainbridge at gmail.com>
> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3349
> Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
> ---
>  drivers/gpu/drm/drm_client_modeset.c | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c
> index 31af5cf37a09..b76438c31761 100644
> --- a/drivers/gpu/drm/drm_client_modeset.c
> +++ b/drivers/gpu/drm/drm_client_modeset.c
> @@ -8,6 +8,7 @@
>   */
>
>  #include "drm/drm_modeset_lock.h"
> +#include <acpi/button.h>
>  #include <linux/module.h>
>  #include <linux/mutex.h>
>  #include <linux/slab.h>
> @@ -257,6 +258,27 @@ static void drm_client_connectors_enabled(struct drm_connector **connectors,
>                 enabled[i] = drm_connector_enabled(connectors[i], false);
>  }
>
> +static void drm_client_match_edp_lid(struct drm_device *dev,
> +                                    struct drm_connector **connectors,
> +                                    unsigned int connector_count,
> +                                    bool *enabled)
> +{
> +       int i;
> +
> +       for (i = 0; i < connector_count; i++) {
> +               struct drm_connector *connector = connectors[i];
> +
> +               if (connector->connector_type != DRM_MODE_CONNECTOR_eDP || !enabled[i])

Might want to check for LVDS here as well since a lot of laptops used
LVDS prior to eDP.

Alex

> +                       continue;
> +
> +               if (!acpi_lid_open()) {
> +                       drm_dbg_kms(dev, "[CONNECTOR:%d:%s] lid is closed, disabling\n",
> +                                   connector->base.id, connector->name);
> +                       enabled[i] = false;
> +               }
> +       }
> +}
> +
>  static bool drm_client_target_cloned(struct drm_device *dev,
>                                      struct drm_connector **connectors,
>                                      unsigned int connector_count,
> @@ -844,6 +866,7 @@ int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width,
>                 memset(crtcs, 0, connector_count * sizeof(*crtcs));
>                 memset(offsets, 0, connector_count * sizeof(*offsets));
>
> +               drm_client_match_edp_lid(dev, connectors, connector_count, enabled);
>                 if (!drm_client_target_cloned(dev, connectors, connector_count, modes,
>                                               offsets, enabled, width, height) &&
>                     !drm_client_target_preferred(dev, connectors, connector_count, modes,
> --
> 2.43.0
>