linux-kernel - [PATCH 2/2] imx-drm: ipuv3-crtc: Use DRM mode flags to configure pixel clock polarity

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Date:	Mon, 16 Mar 2015 18:29:04 +0100
From:	Sébastien Szymanski 
	<sebastien.szymanski@...adeus.com>
To:	David Airlie <airlied@...ux.ie>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	linux-api@...r.kernel.org
Cc:	Sébastien Szymanski 
	<sebastien.szymanski@...adeus.com>,
	Mohsin Kazmi <mohsin_kazmi@...tor.com>,
	Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: [PATCH 2/2] imx-drm: ipuv3-crtc: Use DRM mode flags to configure pixel clock polarity

From: Steve Longerbeam <steve_longerbeam@...tor.com>

Previously, pixel clock polarity was hardcoded and wasn't configurable.
This patch adds support to configure the pixel clock polarity from the
DRM mode flags.

[Sébastien - rebase]

Signed-off-by: Mohsin Kazmi <mohsin_kazmi@...tor.com>
Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@...adeus.com>
---
 drivers/gpu/drm/imx/ipuv3-crtc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
index 98551e3..71f888b 100644
--- a/drivers/gpu/drm/imx/ipuv3-crtc.c
+++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
@@ -171,10 +171,12 @@ static int ipu_crtc_mode_set(struct drm_crtc *crtc,
 	else
 		sig_cfg.clkflags = 0;
 
+	if (mode->flags & DRM_MODE_FLAG_PCLK)
+		sig_cfg.clk_pol = 1;
+
 	out_pixel_fmt = ipu_crtc->interface_pix_fmt;
 
 	sig_cfg.enable_pol = 1;
-	sig_cfg.clk_pol = 0;
 	sig_cfg.pixel_fmt = out_pixel_fmt;
 	sig_cfg.v_to_h_sync = 0;
 	sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;
-- 
2.0.5

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