From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from gloria.sntech.de (gloria.sntech.de [185.11.138.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5C61C17E8FC; Mon, 27 May 2024 20:44:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.11.138.130 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716842653; cv=none; b=UtaYUoaQQAHaXacG/BT1uzBtTHpS2B/IMLYXUd5/MyskK2D53dj6TRHpMFxCrz7v/LCZW5KjJtk4muIXY3J3NC9xhgXYgqyvhFJL56hH+8KrmiItJrA3kfNPNMo1Z4MsZbvGS8Lq5hG2LuIKSJhFlT/ohBLyRWtYr6Rgj2/+xdQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716842653; c=relaxed/simple; bh=U1AjakDK+K5nbYaKkqnUSS8GTOMKffDL+ZBcW8XHkjU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=WM2mD5fQRA4O6jtlqGd1hGcuExyfYYOMdhZekUfL5fQfPePhKEWP2CoNxYgGtb1BhOrB0+wCytk7hYxZ2zDPAIsqoRwsQ2L6GsCMx15bcxTc/83G7YmKPayGaLkx9o5boZs8fsgi4AhuQlamMJwltAAit8GNHroH9k6nD/uZsNU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sntech.de; spf=pass smtp.mailfrom=sntech.de; arc=none smtp.client-ip=185.11.138.130 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sntech.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sntech.de Received: from i5e86193d.versanet.de ([94.134.25.61] helo=diego.localnet) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1sBhBf-0004Tg-UH; Mon, 27 May 2024 22:43:19 +0200 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: Val Packett Cc: Val Packett , stable@vger.kernel.org, Sandy Huang , Andy Yan , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 1/2] drm/rockchip: vop: clear DMA stop bit upon vblank on RK3066 Date: Mon, 27 May 2024 22:43:18 +0200 Message-ID: <1817371.3VsfAaAtOV@diego> In-Reply-To: <20240527071736.21784-1-val@packett.cool> References: <2024051930-canteen-produce-1ba7@gregkh> <20240527071736.21784-1-val@packett.cool> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Hi Val, Am Montag, 27. Mai 2024, 09:16:33 CEST schrieb Val Packett: > On the RK3066, there is a bit that must be cleared, otherwise > the picture does not show up on the display (at least for RGB). > > Fixes: f4a6de8 ("drm: rockchip: vop: add rk3066 vop definitions") > Cc: stable@vger.kernel.org > Signed-off-by: Val Packett > --- > v2: doing this on vblank makes more sense; added fixes tag can you give a rationale for this please? I.e. does this dma-stop bit need to be set on each vblank that happens to push this frame to the display somehow? Because at least in theory atomic_flush where this was living in in v1, might happen at a slower interval? Thanks Heiko > --- > drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 6 ++++++ > drivers/gpu/drm/rockchip/rockchip_drm_vop.h | 1 + > drivers/gpu/drm/rockchip/rockchip_vop_reg.c | 1 + > 3 files changed, 8 insertions(+) > > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c > index a13473b2d..2731fe2b2 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c > @@ -1766,6 +1766,12 @@ static void vop_handle_vblank(struct vop *vop) > } > spin_unlock(&drm->event_lock); > > + if (VOP_HAS_REG(vop, common, dma_stop)) { > + spin_lock(&vop->reg_lock); > + VOP_REG_SET(vop, common, dma_stop, 0); > + spin_unlock(&vop->reg_lock); > + } > + > if (test_and_clear_bit(VOP_PENDING_FB_UNREF, &vop->pending)) > drm_flip_work_commit(&vop->fb_unref_work, system_unbound_wq); > } > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h > index b33e5bdc2..0cf512cc1 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h > @@ -122,6 +122,7 @@ struct vop_common { > struct vop_reg lut_buffer_index; > struct vop_reg gate_en; > struct vop_reg mmu_en; > + struct vop_reg dma_stop; > struct vop_reg out_mode; > struct vop_reg standby; > }; > diff --git a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c > index b9ee02061..9bcb40a64 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c > +++ b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c > @@ -466,6 +466,7 @@ static const struct vop_output rk3066_output = { > }; > > static const struct vop_common rk3066_common = { > + .dma_stop = VOP_REG(RK3066_SYS_CTRL0, 0x1, 0), > .standby = VOP_REG(RK3066_SYS_CTRL0, 0x1, 1), > .out_mode = VOP_REG(RK3066_DSP_CTRL0, 0xf, 0), > .cfg_done = VOP_REG(RK3066_REG_CFG_DONE, 0x1, 0), >