linux-kernel - [PATCH 2/3] drm/i2c: tda998x: Increase the supported dotclock frequency to 165MHz for TDA19988.

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Date:	Wed, 11 Nov 2015 15:34:34 +0000
From:	Liviu Dudau <Liviu.Dudau@....com>
To:	David Airlie <airlied@...ux.ie>
Cc:	Russell King <rmk+kernel@....linux.org.uk>,
	DRI devel <dri-devel@...ts.freedesktop.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/3] drm/i2c: tda998x: Increase the supported dotclock frequency to 165MHz for TDA19988.

Spec sheet states that the TDA19988 supports up to 165MHz dotclock speeds.
Without this change modes higher than 1080p are un-attainable.

Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
Cc: Russell King <rmk+kernel@....linux.org.uk>
---
 drivers/gpu/drm/i2c/tda998x_drv.c | 5 +++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index cdbd83b..a9c8ee8 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -878,7 +878,10 @@ tda998x_encoder_mode_fixup(struct drm_encoder *encoder,
 static int tda998x_connector_mode_valid(struct drm_connector *connector,
 					struct drm_display_mode *mode)
 {
-	if (mode->clock > 150000)
+	/* TDA19988 dotclock can go up to 165MHz */
+	struct tda998x_priv *priv = conn_to_tda998x_priv(connector);
+
+	if (mode->clock > ((priv->rev == TDA19988) ? 165000 : 150000))
 		return MODE_CLOCK_HIGH;
 	if (mode->htotal >= BIT(13))
 		return MODE_BAD_HVALUE;
-- 
2.6.0

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