From 72e4d3fb72e9f0f016946158a7d95304832768e6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Tue, 19 Mar 2024 11:24:42 +0200 Subject: [PATCH] drm/i915/bios: Tolerate devdata==NULL in intel_bios_encoder_supports_dp_dual_mode() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 32e39bab59934bfd3f37097d4dd85ac5eb0fd549 upstream. If we have no VBT, or the VBT didn't declare the encoder in question, we won't have the 'devdata' for the encoder. Instead of oopsing just bail early. We won't be able to tell whether the port is DP++ or not, but so be it. Cc: stable@vger.kernel.org Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/10464 Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20240319092443.15769-1-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula (cherry picked from commit 26410896206342c8a80d2b027923e9ee7d33b733) Signed-off-by: Rodrigo Vivi Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/display/intel_bios.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index a70b7061742a..9cc1ef2ca72c 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -3413,6 +3413,9 @@ static bool intel_bios_encoder_supports_dp_dual_mode(const struct intel_bios_enc { const struct child_device_config *child = &devdata->child; + if (!devdata) + return false; + if (!intel_bios_encoder_supports_dp(devdata) || !intel_bios_encoder_supports_hdmi(devdata)) return false;