linux-kernel - [PATCH 4/5] drm/sun4i: Compute TCON1 mode from tv mode

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Date:   Tue, 18 Oct 2016 10:29:37 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>
Cc:     dri-devel@...ts.freedesktop.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        linux-arm-kernel@...ts.infradead.org,
        Hans de Goede <hdegoede@...hat.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 4/5] drm/sun4i: Compute TCON1 mode from tv mode

Since the mode passed in mode_set is probably going to be a scaled down
version of the TV mode, we cannot just use it.

Instead, try to retrieve the actual mode we want to set, and generate a drm
mode from that.

Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
---
 drivers/gpu/drm/sun4i/sun4i_tv.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c b/drivers/gpu/drm/sun4i/sun4i_tv.c
index 6f8077013be3..f99886462cb8 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tv.c
@@ -401,8 +401,13 @@ static void sun4i_tv_mode_set(struct drm_encoder *encoder,
 	struct sun4i_drv *drv = tv->drv;
 	struct sun4i_tcon *tcon = drv->tcon;
 	const struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
+	struct drm_display_mode tv_drm_mode = { 0 };
 
-	sun4i_tcon1_mode_set(tcon, mode);
+	strcpy(tv_drm_mode.name, "TV");
+	sun4i_tv_mode_to_drm_mode(tv_mode, &tv_drm_mode);
+	drm_mode_set_crtcinfo(&tv_drm_mode, CRTC_INTERLACE_HALVE_V);
+
+	sun4i_tcon1_mode_set(tcon, &tv_drm_mode);
 
 	/* Enable and map the DAC to the output */
 	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
-- 
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