linux-kernel - [PATCH 1/6] drm/rockchip: vop: no need wait vblank on crtc enable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1501494577-6884-1-git-send-email-mark.yao@rock-chips.com>
Date:   Mon, 31 Jul 2017 17:49:37 +0800
From:   Mark Yao <mark.yao@...k-chips.com>
To:     Mark Yao <mark.yao@...k-chips.com>,
        David Airlie <airlied@...ux.ie>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/6] drm/rockchip: vop: no need wait vblank on crtc enable

Since atomic framework, crtc enable and disable are in pairs,
no need to wait vblank.

Signed-off-by: Mark Yao <mark.yao@...k-chips.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 36 -----------------------------
 1 file changed, 36 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 1d42049..0bfd563 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -893,42 +893,6 @@ static void vop_crtc_enable(struct drm_crtc *crtc)
 		return;
 	}
 
-	/*
-	 * If dclk rate is zero, mean that scanout is stop,
-	 * we don't need wait any more.
-	 */
-	if (clk_get_rate(vop->dclk)) {
-		/*
-		 * Rk3288 vop timing register is immediately, when configure
-		 * display timing on display time, may cause tearing.
-		 *
-		 * Vop standby will take effect at end of current frame,
-		 * if dsp hold valid irq happen, it means standby complete.
-		 *
-		 * mode set:
-		 *    standby and wait complete --> |----
-		 *                                  | display time
-		 *                                  |----
-		 *                                  |---> dsp hold irq
-		 *     configure display timing --> |
-		 *         standby exit             |
-		 *                                  | new frame start.
-		 */
-
-		reinit_completion(&vop->dsp_hold_completion);
-		vop_dsp_hold_valid_irq_enable(vop);
-
-		spin_lock(&vop->reg_lock);
-
-		VOP_REG_SET(vop, common, standby, 1);
-
-		spin_unlock(&vop->reg_lock);
-
-		wait_for_completion(&vop->dsp_hold_completion);
-
-		vop_dsp_hold_valid_irq_disable(vop);
-	}
-
 	pin_pol = BIT(DCLK_INVERT);
 	pin_pol |= (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) ?
 		   BIT(HSYNC_POSITIVE) : 0;
-- 
1.9.1