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drm/vc4: crtc: Skip the TXP

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commit 47a50743031ad4138050ae6d266ddd3dfe845ead upstream.

The vc4_set_crtc_possible_masks is meant to run over all the encoders
and then set their possible_crtcs mask to their associated pixelvalve.

However, since the commit 39fcb2808376 ("drm/vc4: txp: Turn the TXP into
a CRTC of its own"), the TXP has been turned to a CRTC and encoder of
its own, and while it does indeed register an encoder, it no longer has
an associated pixelvalve. The code will thus run over the TXP encoder
and set a bogus possible_crtcs mask, overriding the one set in the TXP
bind function.

In order to fix this, let's skip any virtual encoder.

Cc: <stable@vger.kernel.org> # v5.9+
Fixes: 39fcb2808376 ("drm/vc4: txp: Turn the TXP into a CRTC of its own")
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210507150515.257424-3-maxime@cerno.tech
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Maxime Ripard 2021-05-07 17:05:05 +02:00 committed by Greg Kroah-Hartman
parent 293e520d20
commit a2b8835cb4
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/vc4/vc4_crtc.c
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@ -1042,6 +1042,9 @@ static void vc4_set_crtc_possible_masks(struct drm_device *drm,
struct vc4_encoder *vc4_encoder;
int i;
if (encoder->encoder_type == DRM_MODE_ENCODER_VIRTUAL)
continue;
vc4_encoder = to_vc4_encoder(encoder);
for (i = 0; i < ARRAY_SIZE(pv_data->encoder_types); i++) {
if (vc4_encoder->type == encoder_types[i]) {