Re: [PATCH 6.18 190/333] drm/bridge: ti-sn65dsi86: Enable HPD polling if IRQ is not used

Francesco Dolcini
2026-03-18T07:38:07Z

Hello Greg,

On Tue, Mar 17, 2026 at 05:33:39PM +0100, Greg Kroah-Hartman wrote:
> 6.18-stable review patch. If anyone has any objections, please let me know.
>
> ------------------
>
> From: Franz Schnyder <franz.schnyder@toradex.com>
>
> commit 0b87d51690dd5131cbe9fbd23746b037aab89815 upstream.
>
> Fallback to polling to detect hotplug events on systems without
> interrupts.
>
> On systems where the interrupt line of the bridge is not connected,
> the bridge cannot notify hotplug events. Only add the
> DRM_BRIDGE_OP_HPD flag if an interrupt has been registered
> otherwise remain in polling mode.
>
> Fixes: 55e8ff842051 ("drm/bridge: ti-sn65dsi86: Add HPD for DisplayPort connector type")
> Cc: stable@vger.kernel.org # 6.16: 9133bc3f0564: drm/bridge: ti-sn65dsi86: Add
> Signed-off-by: Franz Schnyder <franz.schnyder@toradex.com>
> Reviewed-by: Douglas Anderson <dianders@chromium.org>
> [dianders: Adjusted Fixes/stable line based on discussion]
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> Link: https://patch.msgid.link/20260206123758.374555-1-fra.schnyder@gmail.com
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Please queue also commit 9133bc3f0564 ("drm/bridge: ti-sn65dsi86: Add
support for DisplayPort mode with HPD"), it is a pre-requisite for this
one.

Francesco