linux-kernel - [PATCH v2 14/22] drm/msm/dpu: Require modeset if clone mode status changes

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Message-ID: <20240924-concurrent-wb-v2-14-7849f900e863@quicinc.com>
Date: Tue, 24 Sep 2024 15:59:30 -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 14/22] drm/msm/dpu: Require modeset if clone mode status
 changes

If the clone mode enabled status is changing, a modeset needs to happen
so that the resources can be reassigned

Signed-off-by: Jessica Zhang <quic_jesszhan@...cinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index a7850bf844db..f20e44e9fc05 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -1268,6 +1268,8 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
 {
 	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 									  crtc);
+	struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state,
+									      crtc);
 	struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
 	struct dpu_crtc_state *cstate = to_dpu_crtc_state(crtc_state);
 
@@ -1279,6 +1281,8 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
 	int rc = 0;
 
 	bool needs_dirtyfb = dpu_crtc_needs_dirtyfb(crtc_state);
+	bool clone_mode_requested = drm_crtc_in_clone_mode(old_crtc_state);
+	bool clone_mode_enabled = drm_crtc_in_clone_mode(crtc_state);
 
 	/* there might be cases where encoder needs a modeset too */
 	drm_for_each_encoder_mask(drm_enc, crtc->dev, crtc_state->encoder_mask) {
@@ -1286,6 +1290,10 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
 			crtc_state->mode_changed = true;
 	}
 
+	if ((clone_mode_requested && !clone_mode_enabled) ||
+	    (!clone_mode_requested && clone_mode_enabled))
+		crtc_state->mode_changed = true;
+
 	if (drm_atomic_crtc_needs_modeset(crtc_state)) {
 		rc = dpu_crtc_assign_resources(crtc, crtc_state);
 		if (rc < 0)

-- 
2.34.1