The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 8d58bb7991c45f6b60710cc04c9498c6ea96db90 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '167844825645110@kroah.com' --subject-prefix 'PATCH 5.10.y' HEAD^..

Possible dependencies:

8d58bb7991c4 ("drm/i915/dsi: fix VBT send packet port selection for dual link DSI") 08c59dde71b7 ("drm/i915/dsi: fix VBT send packet port selection for ICL+")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 8d58bb7991c45f6b60710cc04c9498c6ea96db90 Mon Sep 17 00:00:00 2001 From: Mikko Kovanen mikko.kovanen@aavamobile.com Date: Sat, 26 Nov 2022 13:27:13 +0000 Subject: [PATCH] drm/i915/dsi: fix VBT send packet port selection for dual link DSI

intel_dsi->ports contains bitmask of enabled ports and correspondingly logic for selecting port for VBT packet sending must use port specific bitmask when deciding appropriate port.

Fixes: 08c59dde71b7 ("drm/i915/dsi: fix VBT send packet port selection for ICL+") Cc: stable@vger.kernel.org Signed-off-by: Mikko Kovanen mikko.kovanen@aavamobile.com Reviewed-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Jani Nikula jani.nikula@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/DBBPR09MB466592B16885D99ABBF23...

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c index 75e8cc4337c9..fce69fa446d5 100644 --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c @@ -137,9 +137,9 @@ static enum port intel_dsi_seq_port_to_port(struct intel_dsi *intel_dsi, return ffs(intel_dsi->ports) - 1;

if (seq_port) { - if (intel_dsi->ports & PORT_B) + if (intel_dsi->ports & BIT(PORT_B)) return PORT_B; - else if (intel_dsi->ports & PORT_C) + else if (intel_dsi->ports & BIT(PORT_C)) return PORT_C; }