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From:   wangyan wang <wangyan.wang@mediatek.com>
To:     Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>, CK Hu <ck.hu@mediatek.com>
CC:     wangyan wang <wangyan.wang@mediatek.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        chunhui dai <chunhui.dai@mediatek.com>,
        Colin Ian King <colin.king@canonical.com>,
        Sean Wang <sean.wang@mediatek.com>,
        Ryder Lee <ryder.lee@mediatek.com>,
        <linux-clk@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-mediatek@lists.infradead.org>,
        <dri-devel@lists.freedesktop.org>, <srv_heupstream@mediatek.com>
Subject: [PATCH V8 4/5] drm/mediatek: no change parent rate in round_rate() for mt2701 hdmi phy
Date:   Tue, 2 Apr 2019 17:36:04 +0800
Message-ID: <20190402093605.82004-5-wangyan.wang@mediatek.com>
In-Reply-To: <20190402093605.82004-1-wangyan.wang@mediatek.com>
References: <20190402093605.82004-1-wangyan.wang@mediatek.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
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From: Wangyan Wang <wangyan.wang@mediatek.com>

This is the third step to make MT2701 HDMI stable.
We should not change the rate of parent for hdmi phy when
doing round_rate for this clock. The parent clock of hdmi
phy must be the same as it. We change it when doing set_rate
only.

Signed-off-by: Wangyan Wang <wangyan.wang@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_hdmi_phy.c        | 14 --------------
 drivers/gpu/drm/mediatek/mtk_hdmi_phy.h        |  2 --
 drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c |  6 ++++++
 drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c | 14 ++++++++++++++
 4 files changed, 20 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
index 13bbaf997819..fe05aa762107 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
@@ -15,20 +15,6 @@ static const struct phy_ops mtk_hdmi_phy_dev_ops = {
 	.owner = THIS_MODULE,
 };
 
-long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
-			     unsigned long *parent_rate)
-{
-	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
-
-	hdmi_phy->pll_rate = rate;
-	if (rate <= 74250000)
-		*parent_rate = rate;
-	else
-		*parent_rate = rate / 2;
-
-	return rate;
-}
-
 unsigned long mtk_hdmi_pll_recalc_rate(struct clk_hw *hw,
 				       unsigned long parent_rate)
 {
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
index 0045824c1be9..86895be0d192 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
@@ -49,8 +49,6 @@ void mtk_hdmi_phy_set_bits(struct mtk_hdmi_phy *hdmi_phy, u32 offset,
 void mtk_hdmi_phy_mask(struct mtk_hdmi_phy *hdmi_phy, u32 offset,
 		       u32 val, u32 mask);
 struct mtk_hdmi_phy *to_mtk_hdmi_phy(struct clk_hw *hw);
-long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
-			     unsigned long *parent_rate);
 unsigned long mtk_hdmi_pll_recalc_rate(struct clk_hw *hw,
 				       unsigned long parent_rate);
 
diff --git a/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
index 844e622f052c..5f8c2b044034 100644
--- a/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
+++ b/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
@@ -154,6 +154,12 @@ static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 	return 0;
 }
 
+static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+			     unsigned long *parent_rate)
+{
+	return rate;
+}
+
 static const struct clk_ops mtk_hdmi_phy_pll_ops = {
 	.prepare = mtk_hdmi_pll_prepare,
 	.unprepare = mtk_hdmi_pll_unprepare,
diff --git a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
index f44066875dcd..472d2fda0a03 100644
--- a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
+++ b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
@@ -285,6 +285,20 @@ static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
 	return 0;
 }
 
+static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+			     unsigned long *parent_rate)
+{
+	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
+
+	hdmi_phy->pll_rate = rate;
+	if (rate <= 74250000)
+		*parent_rate = rate;
+	else
+		*parent_rate = rate / 2;
+
+	return rate;
+}
+
 static const struct clk_ops mtk_hdmi_phy_pll_ops = {
 	.prepare = mtk_hdmi_pll_prepare,
 	.unprepare = mtk_hdmi_pll_unprepare,
-- 
2.14.1