linux-kernel - [PATCH 6/7] drm/rockchip: dw-mipi: fix phy clk lane stop state timeout

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Message-Id: <1467968701-15620-7-git-send-email-zyw@rock-chips.com>
Date:	Fri,  8 Jul 2016 17:05:00 +0800
From:	Chris Zhong <zyw@...k-chips.com>
To:	dianders@...omium.org, tfiga@...omium.org, heiko@...ech.de,
	yzq@...k-chips.com
Cc:	linux-rockchip@...ts.infradead.org,
	Chris Zhong <zyw@...k-chips.com>,
	Mark Yao <mark.yao@...k-chips.com>,
	David Airlie <airlied@...ux.ie>,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 6/7] drm/rockchip: dw-mipi: fix phy clk lane stop state timeout

Before phy init, the detection of phy state should be controlled
manually. After that, we can switch the detection to hardward,
it is automatic. Hence move PHY_TXREQUESTCLKHS setting to the end
of phy init.

Signed-off-by: Chris Zhong <zyw@...k-chips.com>
---

 drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index 72d7f48..8401185 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -477,6 +477,8 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
 		dev_err(dsi->dev,
 			"failed to wait for phy clk lane stop state\n");
 
+	dsi_write(dsi, DSI_LPCLK_CTRL, PHY_TXREQUESTCLKHS);
+
 phy_init_end:
 	if (!IS_ERR(dsi->phy_cfg_clk))
 		clk_disable_unprepare(dsi->phy_cfg_clk);
@@ -714,7 +716,6 @@ static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi)
 		  | PHY_RSTZ | PHY_SHUTDOWNZ);
 	dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVIDSION(10) |
 		  TX_ESC_CLK_DIVIDSION(7));
-	dsi_write(dsi, DSI_LPCLK_CTRL, PHY_TXREQUESTCLKHS);
 }
 
 static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
-- 
2.6.3