From patchwork Wed Jun 29 09:15:18 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yakir Yang X-Patchwork-Id: 9204505 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 5467060757 for ; Wed, 29 Jun 2016 09:15:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4376928630 for ; Wed, 29 Jun 2016 09:15:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 347C72862A; Wed, 29 Jun 2016 09:15:56 +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 autolearn=ham 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 868A22862A for ; Wed, 29 Jun 2016 09:15:55 +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 1bIBb9-0006Gx-8L; Wed, 29 Jun 2016 09:15:55 +0000 Received: from lucky1.263xmail.com ([211.157.147.131]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bIBb3-00065E-EC for linux-rockchip@lists.infradead.org; Wed, 29 Jun 2016 09:15:51 +0000 Received: from ykk?rock-chips.com (unknown [192.168.167.172]) by lucky1.263xmail.com (Postfix) with SMTP id 9BD608EF96; Wed, 29 Jun 2016 17:15:24 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id BA4AC3074; Wed, 29 Jun 2016 17:15:19 +0800 (CST) X-RL-SENDER: ykk@rock-chips.com X-FST-TO: yzq@rock-chips.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: ykk@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-SENDER: ykk@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 228306NYS49; Wed, 29 Jun 2016 17:15:22 +0800 (CST) From: Yakir Yang To: Mark Yao , Inki Dae , Jingoo Han , Heiko Stuebner Subject: [PATCH v4 03/11] drm/bridge: analogix_dp: some rockchip chips need to flip REF_CLK bit setting Date: Wed, 29 Jun 2016 17:15:18 +0800 Message-Id: <1467191718-17221-1-git-send-email-ykk@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1467191657-16941-1-git-send-email-ykk@rock-chips.com> References: <1467191657-16941-1-git-send-email-ykk@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160629_021549_910034_20A43CB0 X-CRM114-Status: UNSURE ( 9.20 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Krzysztof Kozlowski , linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, David Airlie , daniel.vetter@ffwll.ch, emil.l.velikov@gmail.com, dianders@chromium.org, dri-devel@lists.freedesktop.org, Tomasz Figa , Javier Martinez Canillas , Sean Paul , Yakir Yang , =?UTF-8?q?St=C3=A9phane=20Marchesin?= , Thierry Reding , Dan Carpenter MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP As vendor document indicate, when REF_CLK bit set 0, then DP phy's REF_CLK should switch to 24M source clock. But due to IC PHY layout mistaken, some chips need to flip this bit(like RK3288), and unfortunately they didn't indicate in the DP version register. That's why we have to make this little hack. Signed-off-by: Yakir Yang Reviewed-by: Tomasz Figa Tested-by: Javier Martinez Canillas Reviewed-by: Sean Paul --- Changes in v4: - Remove subdev_type number, and add 'is_rockchip(type)' helper function (Sean) - Add reviewed flag from Tomasz. Changes in v3: - Make this hack code more clear (Tomasz, reviewed at Google Gerrit) reg = ~reg & REF_CLK_MASK; ---> reg ^= REF_CLK_MASK; [https://chromium-review.googlesource.com/#/c/346852/7/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c@80] - Add tested flag from Javier drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 12 ++++++++---- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h | 1 + include/drm/bridge/analogix_dp.h | 5 +++++ 3 files changed, 14 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index 49205ef..48030f0 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -74,8 +74,12 @@ void analogix_dp_init_analog_param(struct analogix_dp_device *dp) reg = SEL_24M | TX_DVDD_BIT_1_0625V; writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_2); - if (dp->plat_data && (dp->plat_data->dev_type == RK3288_DP)) { - writel(REF_CLK_24M, dp->reg_base + ANALOGIX_DP_PLL_REG_1); + if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) { + reg = REF_CLK_24M; + if (dp->plat_data->dev_type == RK3288_DP) + reg ^= REF_CLK_MASK; + + writel(reg, dp->reg_base + ANALOGIX_DP_PLL_REG_1); writel(0x95, dp->reg_base + ANALOGIX_DP_PLL_REG_2); writel(0x40, dp->reg_base + ANALOGIX_DP_PLL_REG_3); writel(0x58, dp->reg_base + ANALOGIX_DP_PLL_REG_4); @@ -244,7 +248,7 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, u32 reg; u32 phy_pd_addr = ANALOGIX_DP_PHY_PD; - if (dp->plat_data && (dp->plat_data->dev_type == RK3288_DP)) + if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) phy_pd_addr = ANALOGIX_DP_PD; switch (block) { @@ -448,7 +452,7 @@ void analogix_dp_init_aux(struct analogix_dp_device *dp) analogix_dp_reset_aux(dp); /* Disable AUX transaction H/W retry */ - if (dp->plat_data && (dp->plat_data->dev_type == RK3288_DP)) + if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) reg = AUX_BIT_PERIOD_EXPECTED_DELAY(0) | AUX_HW_RETRY_COUNT_SEL(3) | AUX_HW_RETRY_INTERVAL_600_MICROSECONDS; diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h index 88d56ad..cdcc6c5 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h @@ -165,6 +165,7 @@ /* ANALOGIX_DP_PLL_REG_1 */ #define REF_CLK_24M (0x1 << 0) #define REF_CLK_27M (0x0 << 0) +#define REF_CLK_MASK (0x1 << 0) /* ANALOGIX_DP_LANE_MAP */ #define LANE3_MAP_LOGIC_LANE_0 (0x0 << 6) diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h index 25afb31..790ab5d 100644 --- a/include/drm/bridge/analogix_dp.h +++ b/include/drm/bridge/analogix_dp.h @@ -18,6 +18,11 @@ enum analogix_dp_devtype { RK3288_DP, }; +static inline bool is_rockchip(enum analogix_dp_devtype type) +{ + return type == RK3288_DP; +} + struct analogix_dp_plat_data { enum analogix_dp_devtype dev_type; struct drm_panel *panel;