drm/i915: Make intel_get_crtc_new_encoder() less oopsy

[ Upstream commit 631420b06597a33c72b6dcef78d1c2dea17f452d ]

The point of the WARN was to print something, not oops
straight up. Currently that is precisely what happens
if we can't find the connector for the crtc in the atomic
state. Get the dev pointer from the atomic state instead
of the potentially NULL encoder to avoid that.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230413200602.6037-2-ville.syrjala@linux.intel.com
Fixes: 3a47ae201e07 ("drm/i915/display: Make WARN* drm specific where encoder ptr is available")
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit 3b6692357f70498f617ea1b31a0378070a0acf1c)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 2d46dcf820a230542d8b21b3c7e35b1a9440e382..80eb4f92167cc26a37a85caa8ea0567aae308280 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1090,7 +1090,7 @@ intel_get_crtc_new_encoder(const struct intel_atomic_state *state,
                num_encoders++;
        }
 
-       drm_WARN(encoder->base.dev, num_encoders != 1,
+       drm_WARN(state->base.dev, num_encoders != 1,
                 "%d encoders for pipe %c\n",
                 num_encoders, pipe_name(master_crtc->pipe));