From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 539A0E77180 for ; Wed, 11 Dec 2024 17:24:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=u003TtXLqRdl21a2NWcQiJL7JcZsNB0P9eljCYzTzjc=; b=3gOyiqkjVxWfoBsRH6Q+6aW482 85+XBI5zA7PHhjEY9SkHELSPhlqBkv1RKTEgd4e1eASGFCVfU8NTlytsgQEaJuCZuSrkxhohwnBBl rKHvlU0rvFCYMG/sXf+W3T/zUimaUvd/sj/Fq/TC7H83f+xVmmGuJGT25cThG4M16gdvIGd+mDRWt gSY/Q5VJJ02LwUoKFBiGNZ4RbGFqc5iQaQlSKcU87mZu9/bfu+BCUe51DAHhzCt0ZNOINXlW+WQxK l/FxLs57FKXfgOx8TNWxauOpdBYdZu1WwAxr3M5+3lorqIDN7igCTNRtAW8vQ9mVDl+bBnqbZqwA7 tJcgjsvw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tLQRy-0000000FaXo-0giw; Wed, 11 Dec 2024 17:24:38 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tLQQt-0000000FaFt-1FsS; Wed, 11 Dec 2024 17:23:32 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sntech.de; s=gloria202408; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=u003TtXLqRdl21a2NWcQiJL7JcZsNB0P9eljCYzTzjc=; b=2W5Hs4dExuwoJVN6KAAy7vsVT8 q8ibUEy9c8pdKQrMtX4D57ESDxDZMe9l6EsD9jXwvIsbgUT5878dNDDjXO3Dw+O/7w7Bq/hP9jOkX wX2Zs3uIAu/MV2PAAw5nEzIpkIvvq0UR07OAuOONfXY1lXVt64sh/sgrk2c20vi3XVmkEP2ulBfog E2wpfVvR4vypUbQiDtJDA1t2K8gUR00uMBbUPxlOgWkHF6oQWSyd50veAACWTqlcN6DfKStMmFgCm 0K5cg/n4Ex8wYoFM9fUkBAmqTnMxHK1dsV5jg2g6Jt+QW5GCpZnjltNrlFvWnbkX5jtPVfrSf6usd FyEOxEQg==; Received: from i53875bc4.versanet.de ([83.135.91.196] 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 1tLQQS-00063M-PG; Wed, 11 Dec 2024 18:23:04 +0100 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: Cristian Ciocaltea , Maxime Ripard Cc: Sandy Huang , Andy Yan , Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , kernel@collabora.com, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, FUKAUMI Naoki Subject: Re: [PATCH v2 3/5] drm/rockchip: vop2: Improve display modes handling on RK3588 HDMI0 Date: Wed, 11 Dec 2024 18:23:03 +0100 Message-ID: <1820767.5KxKD5qtyk@diego> In-Reply-To: <64vc5pkj44w3qxf5wkcxgghpwhvoagzemcsfqmi7fhsxt7vlqd@yfcgloi45ygh> References: <20241211-vop2-hdmi0-disp-modes-v2-0-471cf5001e45@collabora.com> <20241211-vop2-hdmi0-disp-modes-v2-3-471cf5001e45@collabora.com> <64vc5pkj44w3qxf5wkcxgghpwhvoagzemcsfqmi7fhsxt7vlqd@yfcgloi45ygh> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241211_092331_360867_0F096F36 X-CRM114-Status: GOOD ( 33.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Am Mittwoch, 11. Dezember 2024, 18:07:57 CET schrieb Maxime Ripard: > On Wed, Dec 11, 2024 at 12:15:07PM +0200, Cristian Ciocaltea wrote: > > The RK3588 specific implementation is currently quite limited in terms > > of handling the full range of display modes supported by the connected > > screens, e.g. 2560x1440@75Hz, 2048x1152@60Hz, 1024x768@60Hz are just a > > few of them. > > > > Additionally, it doesn't cope well with non-integer refresh rates like > > 59.94, 29.97, 23.98, etc. > > > > Make use of HDMI0 PHY PLL as a more accurate DCLK source to handle > > all display modes up to 4K@60Hz. > > > > Tested-by: FUKAUMI Naoki > > Signed-off-by: Cristian Ciocaltea > > --- > > drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 34 ++++++++++++++++++++++++++++ > > 1 file changed, 34 insertions(+) > > > > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c > > index 8b2f53ffefdbf1cc8737b3a86e630a03a7fd9348..393fe6aa170aaee9663c4a6d98c1cd6a5ef79392 100644 > > --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c > > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c > > @@ -158,6 +158,7 @@ struct vop2_video_port { > > struct drm_crtc crtc; > > struct vop2 *vop2; > > struct clk *dclk; > > + struct clk *dclk_src; > > unsigned int id; > > const struct vop2_video_port_data *data; > > > > @@ -212,6 +213,7 @@ struct vop2 { > > struct clk *hclk; > > struct clk *aclk; > > struct clk *pclk; > > + struct clk *pll_hdmiphy0; > > > > /* optional internal rgb encoder */ > > struct rockchip_rgb *rgb; > > @@ -220,6 +222,8 @@ struct vop2 { > > struct vop2_win win[]; > > }; > > > > +#define VOP2_MAX_DCLK_RATE 600000 /* kHz */ > > + > > #define vop2_output_if_is_hdmi(x) ((x) == ROCKCHIP_VOP2_EP_HDMI0 || \ > > (x) == ROCKCHIP_VOP2_EP_HDMI1) > > > > @@ -1033,6 +1037,9 @@ static void vop2_crtc_atomic_disable(struct drm_crtc *crtc, > > > > vop2_crtc_disable_irq(vp, VP_INT_DSP_HOLD_VALID); > > > > + if (vp->dclk_src) > > + clk_set_parent(vp->dclk, vp->dclk_src); > > + > > clk_disable_unprepare(vp->dclk); > > > > vop2->enable_count--; > > @@ -2049,6 +2056,27 @@ static void vop2_crtc_atomic_enable(struct drm_crtc *crtc, > > > > vop2_vp_write(vp, RK3568_VP_MIPI_CTRL, 0); > > > > + /* > > + * Switch to HDMI PHY PLL as DCLK source for display modes up > > + * to 4K@60Hz, if available, otherwise keep using the system CRU. > > + */ > > + if (vop2->pll_hdmiphy0 && mode->crtc_clock <= VOP2_MAX_DCLK_RATE) { > > + drm_for_each_encoder_mask(encoder, crtc->dev, crtc_state->encoder_mask) { > > + struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder); > > + > > + if (rkencoder->crtc_endpoint_id == ROCKCHIP_VOP2_EP_HDMI0) { > > + if (!vp->dclk_src) > > + vp->dclk_src = clk_get_parent(vp->dclk); > > + > > + ret = clk_set_parent(vp->dclk, vop2->pll_hdmiphy0); > > + if (ret < 0) > > + drm_warn(vop2->drm, > > + "Could not switch to HDMI0 PHY PLL: %d\n", ret); > > + break; > > + } > > + } > > + } > > + > > It seems pretty fragile to do it at atomic_enable time, even more so > since you don't lock the parent either. > > Any reason not to do it in the DRM or clock driver probe, and make sure > you never change the parent somehow? On rk3588 we have 3 dclk_s and 2 hdmi controllers. Each video-port can use the clock generated from either the hdmi0phy or hdmi1phy, depending on which hdmi-controller it uses. So you actually need to know which vpX will output to which hdmiY to then reparent that dclk to the hdmiphy output.