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Message-ID: <20140125181442.3e2e6eb0@armhf>
Date: Sat, 25 Jan 2014 18:14:42 +0100
From: Jean-Francois Moine <moinejf@...e.fr>
To: dri-devel@...ts.freedesktop.org
Cc: Dave Airlie <airlied@...il.com>, Rob Clark <robdclark@...il.com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Russell King - ARM Linux <linux@....linux.org.uk>
Subject: [PATCH v4 10/24] drm/i2c: tda998x: don't read write-only registers
This patch takes care of the write-only registers of the tda998x.
The registers SOFTRESET, TBG_CNTRL_0 and TBG_CNTRL_1 have all bits
cleared after reset, so, they may be fully re-written.
The register MAT_CONTRL is set to
MAT_CONTRL_MAT_BP | MAT_CONTRL_MAT_SC(1)
after reset, so, it may be fully set again to this value.
Signed-off-by: Jean-Francois Moine <moinejf@...e.fr>
---
drivers/gpu/drm/i2c/tda998x_drv.c | 46 ++++++++++++++++++++-------------------
1 file changed, 24 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 978edaf..b6fdeb7 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -495,9 +495,9 @@ static void
tda998x_reset(struct tda998x_priv *priv)
{
/* reset audio and i2c master: */
- reg_set(priv, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
+ reg_write(priv, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
msleep(50);
- reg_clear(priv, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
+ reg_write(priv, REG_SOFTRESET, 0);
msleep(50);
/* reset transmitter: */
@@ -853,7 +853,7 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder,
reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
/* set HDMI HDCP mode off: */
- reg_set(priv, REG_TBG_CNTRL_1, TBG_CNTRL_1_DWIN_DIS);
+ reg_write(priv, REG_TBG_CNTRL_1, TBG_CNTRL_1_DWIN_DIS);
reg_clear(priv, REG_TX33, TX33_HDMI);
reg_write(priv, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(0));
@@ -880,38 +880,28 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder,
PLL_SERIAL_2_SRL_PR(rep));
/* set color matrix bypass flag: */
- reg_set(priv, REG_MAT_CONTRL, MAT_CONTRL_MAT_BP);
+ reg_write(priv, REG_MAT_CONTRL, MAT_CONTRL_MAT_BP |
+ MAT_CONTRL_MAT_SC(1));
/* set BIAS tmds value: */
reg_write(priv, REG_ANA_GENERAL, 0x09);
- reg_clear(priv, REG_TBG_CNTRL_0, TBG_CNTRL_0_SYNC_MTHD);
+ reg_write(priv, REG_TBG_CNTRL_0, 0);
/*
* Sync on rising HSYNC/VSYNC
*/
- reg_write(priv, REG_VIP_CNTRL_3, 0);
- reg_set(priv, REG_VIP_CNTRL_3, VIP_CNTRL_3_SYNC_HS);
+ reg = VIP_CNTRL_3_SYNC_HS;
/*
* TDA19988 requires high-active sync at input stage,
* so invert low-active sync provided by master encoder here
*/
if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
- reg_set(priv, REG_VIP_CNTRL_3, VIP_CNTRL_3_H_TGL);
+ reg |= VIP_CNTRL_3_H_TGL;
if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
- reg_set(priv, REG_VIP_CNTRL_3, VIP_CNTRL_3_V_TGL);
-
- /*
- * Always generate sync polarity relative to input sync and
- * revert input stage toggled sync at output stage
- */
- reg = TBG_CNTRL_1_TGL_EN;
- if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
- reg |= TBG_CNTRL_1_H_TGL;
- if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
- reg |= TBG_CNTRL_1_V_TGL;
- reg_write(priv, REG_TBG_CNTRL_1, reg);
+ reg |= VIP_CNTRL_3_V_TGL;
+ reg_write(priv, REG_VIP_CNTRL_3, reg);
reg_write(priv, REG_VIDFORMAT, 0x00);
reg_write16(priv, REG_REFPIX_MSB, ref_pix);
@@ -940,13 +930,25 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder,
reg_write(priv, REG_ENABLE_SPACE, 0x01);
}
+ /*
+ * Always generate sync polarity relative to input sync and
+ * revert input stage toggled sync at output stage
+ */
+ reg = TBG_CNTRL_1_DWIN_DIS | TBG_CNTRL_1_TGL_EN;
+ if (adj_mode->flags & DRM_MODE_FLAG_NHSYNC)
+ reg |= TBG_CNTRL_1_H_TGL;
+ if (adj_mode->flags & DRM_MODE_FLAG_NVSYNC)
+ reg |= TBG_CNTRL_1_V_TGL;
+ reg_write(priv, REG_TBG_CNTRL_1, reg);
+
/* must be last register set: */
- reg_clear(priv, REG_TBG_CNTRL_0, TBG_CNTRL_0_SYNC_ONCE);
+ reg_write(priv, REG_TBG_CNTRL_0, 0);
/* Only setup the info frames if the sink is HDMI */
if (priv->is_hdmi_sink) {
/* We need to turn HDMI HDCP stuff on to get audio through */
- reg_clear(priv, REG_TBG_CNTRL_1, TBG_CNTRL_1_DWIN_DIS);
+ reg &= ~TBG_CNTRL_1_DWIN_DIS;
+ reg_write(priv, REG_TBG_CNTRL_1, reg);
reg_write(priv, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(1));
reg_set(priv, REG_TX33, TX33_HDMI);
--
1.8.5.3
--
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