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Message-ID: <20240924-concurrent-wb-v2-2-7849f900e863@quicinc.com>
Date: Tue, 24 Sep 2024 15:59:18 -0700
From: Jessica Zhang <quic_jesszhan@...cinc.com>
To: Rob Clark <robdclark@...il.com>,
Dmitry Baryshkov
<dmitry.baryshkov@...aro.org>,
<quic_abhinavk@...cinc.com>, Sean Paul
<sean@...rly.run>,
Marijn Suijten <marijn.suijten@...ainline.org>,
"David
Airlie" <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
"Maarten
Lankhorst" <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard
<mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>
CC: <quic_ebharadw@...cinc.com>, <linux-arm-msm@...r.kernel.org>,
<dri-devel@...ts.freedesktop.org>, <freedreno@...ts.freedesktop.org>,
<linux-kernel@...r.kernel.org>, Rob Clark <robdclark@...omium.org>,
Ville Syrjälä <ville.syrjala@...ux.intel.com>,
"Jessica
Zhang" <quic_jesszhan@...cinc.com>
Subject: [PATCH v2 02/22] drm: Add valid clones check
Check that all encoders attached to a given CRTC are valid
possible_clones of each other.
Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
---
drivers/gpu/drm/drm_atomic_helper.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 43cdf39019a4..cc4001804fdc 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -574,6 +574,25 @@ 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 ((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
@@ -745,6 +764,10 @@ 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;
}
/*
--
2.34.1
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