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drm: Add valid clones check

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[ Upstream commit 41b4b11da02157c7474caf41d56baae0e941d01a ]

Check that all encoders attached to a given CRTC are valid
possible_clones of each other.

Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241216-concurrent-wb-v4-3-fe220297a7f0@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jessica Zhang
2024-12-16 16:43:14 -08:00
committed by Greg Kroah-Hartman
parent 1c58b332bc
commit fe4a7145f0
1 changed files with 28 additions and 0 deletions
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28
drivers/gpu/drm/drm_atomic_helper.c
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@@ -573,6 +573,30 @@ mode_valid(struct drm_atomic_state *state)
return 0;
}
static int drm_atomic_check_valid_clones(struct drm_atomic_state *state,
struct drm_crtc *crtc)
{
struct drm_encoder *drm_enc;
struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
crtc);
drm_for_each_encoder_mask(drm_enc, crtc->dev, crtc_state->encoder_mask) {
if (!drm_enc->possible_clones) {
DRM_DEBUG("enc%d possible_clones is 0\n", drm_enc->base.id);
continue;
}
if ((crtc_state->encoder_mask & drm_enc->possible_clones) !=
crtc_state->encoder_mask) {
DRM_DEBUG("crtc%d failed valid clone check for mask 0x%x\n",
crtc->base.id, crtc_state->encoder_mask);
return -EINVAL;
}
}
return 0;
}
/**
* drm_atomic_helper_check_modeset - validate state object for modeset changes
* @dev: DRM device
@@ -744,6 +768,10 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
ret = drm_atomic_add_affected_planes(state, crtc);
if (ret != 0)
return ret;
ret = drm_atomic_check_valid_clones(state, crtc);
if (ret != 0)
return ret;
}
/*