linux-kernel - [PATCH 06/15] drm/rockchip: vop: limit resolution width to 3840

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Message-ID: <HE1PR06MB40111E90F5DA4718126E6A92AC3C0@HE1PR06MB4011.eurprd06.prod.outlook.com>
Date:   Mon, 6 Jan 2020 20:48:25 +0000
From:   Jonas Karlman <jonas@...boo.se>
To:     Heiko Stuebner <heiko@...ech.de>, Sandy Huang <hjc@...k-chips.com>
CC:     Jonas Karlman <jonas@...boo.se>,
        Kishon Vijay Abraham I <kishon@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Zheng Yang <zhengyang@...k-chips.com>,
        "linux-rockchip@...ts.infradead.org" 
        <linux-rockchip@...ts.infradead.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 06/15] drm/rockchip: vop: limit resolution width to 3840

Using a destination width that is more then 3840 pixels
is not supported in scl_vop_cal_scl_fac().

Work around this limitation by filtering all modes with
a width above 3840 pixels.

Signed-off-by: Jonas Karlman <jonas@...boo.se>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index d04b3492bdac..f181897cbfad 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1036,6 +1036,15 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc)
 	spin_unlock_irqrestore(&vop->irq_lock, flags);
 }
 
+enum drm_mode_status vop_crtc_mode_valid(struct drm_crtc *crtc,
+					 const struct drm_display_mode *mode)
+{
+	if (mode->hdisplay > 3840)
+		return MODE_BAD_HVALUE;
+
+	return MODE_OK;
+}
+
 static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
 				const struct drm_display_mode *mode,
 				struct drm_display_mode *adjusted_mode)
@@ -1377,6 +1386,7 @@ static void vop_crtc_atomic_flush(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs vop_crtc_helper_funcs = {
+	.mode_valid = vop_crtc_mode_valid,
 	.mode_fixup = vop_crtc_mode_fixup,
 	.atomic_check = vop_crtc_atomic_check,
 	.atomic_begin = vop_crtc_atomic_begin,
-- 
2.17.1