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From: Jessica Zhang <quic_jesszhan@quicinc.com>
Date: Thu, 1 Feb 2024 16:10:15 -0800
Subject: [PATCH v2] drm/panel: visionox-vtdr6130: Set prepare_prev_first
 flag
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Message-ID: <20240201-visionox-vtdr-prev-first-v2-1-32db52867624@quicinc.com>
To: <quic_abhinavk@quicinc.com>
CC: Jessica Zhang <quic_jesszhan@quicinc.com>,
        Neil Armstrong
	<neil.armstrong@linaro.org>,
        Sam Ravnborg <sam@ravnborg.org>, David Airlie
	<airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Maarten Lankhorst
	<maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>, <quic_parellan@quicinc.com>,
        <dri-devel@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>

The DSI host must be enabled for the panel to be initialized in
prepare(). Set the prepare_prev_first flag to guarantee this.

Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
---
To: Neil Armstrong <neil.armstrong@linaro.org>
To: Sam Ravnborg <sam@ravnborg.org>
To: David Airlie <airlied@gmail.com>
To: Daniel Vetter <daniel@ffwll.ch>
To: Jessica Zhang <quic_jesszhan@quicinc.com>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
To: Maxime Ripard <mripard@kernel.org>
To: Thomas Zimmermann <tzimmermann@suse.de>
Cc: quic_abhinavk@quicinc.com
Cc: quic_parellan@quicinc.com
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org

Changes in v2:
- Corrected commit message to mention that DCS on commands are sent during
  prepare() instead of probe()
- Dropped Fixes tag
- Rebased onto tip of linux-next
- Link to v1: https://lore.kernel.org/r/20230725-visionox-vtdr-prev-first-v1-1-3bc44cec7dc6@quicinc.com
---
 drivers/gpu/drm/panel/panel-visionox-vtdr6130.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c b/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
index a23407b9f6fb6..540099253e1bd 100644
--- a/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
+++ b/drivers/gpu/drm/panel/panel-visionox-vtdr6130.c
@@ -287,6 +287,7 @@ static int visionox_vtdr6130_probe(struct mipi_dsi_device *dsi)
 	dsi->format = MIPI_DSI_FMT_RGB888;
 	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_NO_EOT_PACKET |
 			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
+	ctx->panel.prepare_prev_first = true;
 
 	drm_panel_init(&ctx->panel, dev, &visionox_vtdr6130_panel_funcs,
 		       DRM_MODE_CONNECTOR_DSI);

---
base-commit: 51b70ff55ed88edd19b080a524063446bcc34b62
change-id: 20230717-visionox-vtdr-prev-first-e00ae02eec9f

Best regards,
-- 
Jessica Zhang <quic_jesszhan@quicinc.com>