From patchwork Wed Aug 17 06:58:07 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibby Hsieh X-Patchwork-Id: 9285215 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 492B2600CB for ; Wed, 17 Aug 2016 06:59:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3A83C28849 for ; Wed, 17 Aug 2016 06:59:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2EB472884B; Wed, 17 Aug 2016 06:59:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A882A28849 for ; Wed, 17 Aug 2016 06:59:39 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bZup9-0002LY-8H; Wed, 17 Aug 2016 06:59:39 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bZuoE-0001xz-C7; Wed, 17 Aug 2016 06:58:43 +0000 Received: from mtkhts09.mediatek.inc [(172.21.101.70)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 797933295; Wed, 17 Aug 2016 14:58:13 +0800 Received: from localhost.localdomain (10.21.14.115) by mtkhts09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.266.1; Wed, 17 Aug 2016 14:58:12 +0800 From: Bibby Hsieh To: David Airlie , Matthias Brugger , Daniel Vetter , , Subject: [PATCH v4 2/3] drm/mediatek: enhance the HDMI driving current Date: Wed, 17 Aug 2016 14:58:07 +0800 Message-ID: <1471417088-2993-3-git-send-email-bibby.hsieh@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1471417088-2993-1-git-send-email-bibby.hsieh@mediatek.com> References: <1471417088-2993-1-git-send-email-bibby.hsieh@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160816_235842_678147_F22501D6 X-CRM114-Status: GOOD ( 11.69 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Junzhi Zhao , Bibby Hsieh , linux-kernel@vger.kernel.org, Cawa Cheng , Mao Huang , CK Hu , Thierry Reding , Philipp Zabel , YT Shen , Yingjoe Chen , Sascha Hauer , linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Junzhi Zhao In order to improve 4K resolution performance, we have to enhance the HDMI driving current when clock rate is greater than 165MHz. Signed-off-by: Junzhi Zhao Signed-off-by: Bibby Hsieh --- drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c | 42 +++++++++++++++++------- 1 file changed, 30 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c index 8a24754..51cb9cf 100644 --- a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c +++ b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c @@ -265,6 +265,9 @@ static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate, struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw); unsigned int pre_div; unsigned int div; + unsigned int pre_ibias; + unsigned int hdmi_ibias; + unsigned int imp_en; dev_dbg(hdmi_phy->dev, "%s: %lu Hz, parent: %lu Hz\n", __func__, rate, parent_rate); @@ -298,18 +301,31 @@ static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate, (0x1 << PLL_BR_SHIFT), RG_HDMITX_PLL_BP | RG_HDMITX_PLL_BC | RG_HDMITX_PLL_BR); - mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON3, RG_HDMITX_PRD_IMP_EN); + if (rate < 165000000) { + mtk_hdmi_phy_clear_bits(hdmi_phy, HDMI_CON3, + RG_HDMITX_PRD_IMP_EN); + pre_ibias = 0x3; + imp_en = 0x0; + hdmi_ibias = hdmi_phy->ibias; + } else { + mtk_hdmi_phy_set_bits(hdmi_phy, HDMI_CON3, + RG_HDMITX_PRD_IMP_EN); + pre_ibias = 0x6; + imp_en = 0xf; + hdmi_ibias = hdmi_phy->ibias_up; + } mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON4, - (0x3 << PRD_IBIAS_CLK_SHIFT) | - (0x3 << PRD_IBIAS_D2_SHIFT) | - (0x3 << PRD_IBIAS_D1_SHIFT) | - (0x3 << PRD_IBIAS_D0_SHIFT), + (pre_ibias << PRD_IBIAS_CLK_SHIFT) | + (pre_ibias << PRD_IBIAS_D2_SHIFT) | + (pre_ibias << PRD_IBIAS_D1_SHIFT) | + (pre_ibias << PRD_IBIAS_D0_SHIFT), RG_HDMITX_PRD_IBIAS_CLK | RG_HDMITX_PRD_IBIAS_D2 | RG_HDMITX_PRD_IBIAS_D1 | RG_HDMITX_PRD_IBIAS_D0); mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON3, - (0x0 << DRV_IMP_EN_SHIFT), RG_HDMITX_DRV_IMP_EN); + (imp_en << DRV_IMP_EN_SHIFT), + RG_HDMITX_DRV_IMP_EN); mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON6, (hdmi_phy->drv_imp_clk << DRV_IMP_CLK_SHIFT) | (hdmi_phy->drv_imp_d2 << DRV_IMP_D2_SHIFT) | @@ -318,12 +334,14 @@ static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate, RG_HDMITX_DRV_IMP_CLK | RG_HDMITX_DRV_IMP_D2 | RG_HDMITX_DRV_IMP_D1 | RG_HDMITX_DRV_IMP_D0); mtk_hdmi_phy_mask(hdmi_phy, HDMI_CON5, - (hdmi_phy->ibias << DRV_IBIAS_CLK_SHIFT) | - (hdmi_phy->ibias << DRV_IBIAS_D2_SHIFT) | - (hdmi_phy->ibias << DRV_IBIAS_D1_SHIFT) | - (hdmi_phy->ibias << DRV_IBIAS_D0_SHIFT), - RG_HDMITX_DRV_IBIAS_CLK | RG_HDMITX_DRV_IBIAS_D2 | - RG_HDMITX_DRV_IBIAS_D1 | RG_HDMITX_DRV_IBIAS_D0); + (hdmi_ibias << DRV_IBIAS_CLK_SHIFT) | + (hdmi_ibias << DRV_IBIAS_D2_SHIFT) | + (hdmi_ibias << DRV_IBIAS_D1_SHIFT) | + (hdmi_ibias << DRV_IBIAS_D0_SHIFT), + RG_HDMITX_DRV_IBIAS_CLK | + RG_HDMITX_DRV_IBIAS_D2 | + RG_HDMITX_DRV_IBIAS_D1 | + RG_HDMITX_DRV_IBIAS_D0); return 0; }