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Message-Id: <20191104110609.B1C6868C7B@verein.lst.de>
Date: Tue, 29 Oct 2019 13:16:57 +0100
From: Torsten Duwe <duwe@....de>
To: Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Thierry Reding <thierry.reding@...il.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Andrzej Hajda <a.hajda@...sung.com>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Icenowy Zheng <icenowy@...c.io>,
Sean Paul <seanpaul@...omium.org>,
Vasily Khoruzhick <anarsoul@...il.com>,
Harald Geyer <harald@...ib.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Thomas Gleixner <tglx@...utronix.de>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v5 4/7] drm/bridge: Prepare Analogix anx6345 support
Add bit definitions required for the anx6345 and add a
sanity check in anx_dp_aux_transfer.
Signed-off-by: Icenowy Zheng <icenowy@...c.io>
Signed-off-by: Vasily Khoruzhick <anarsoul@...il.com>
Signed-off-by: Torsten Duwe <duwe@...e.de>
Reviewed-by: Andrzej Hajda <a.hajda@...sung.com>
---
drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c | 2 +-
drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h | 8 ++++++++
drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h | 3 +++
3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c
index 60707bb5afe7..fe40bab21530 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.c
@@ -116,7 +116,7 @@ ssize_t anx_dp_aux_transfer(struct regmap *map_dptx,
else /* For non-zero-sized set the length field. */
ctrl1 |= (msg->size - 1) << SP_AUX_LENGTH_SHIFT;
- if ((msg->request & DP_AUX_I2C_READ) == 0) {
+ if ((msg->size > 0) && ((msg->request & DP_AUX_I2C_READ) == 0)) {
/* When WRITE | MOT write values to data buffer */
err = regmap_bulk_write(map_dptx,
SP_DP_BUF_DATA0_REG, buffer,
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h
index 430a039c10cd..24bc67ac5479 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h
+++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-dptx.h
@@ -74,7 +74,11 @@
#define SP_CHA_STA BIT(2)
/* Bits for DP System Control Register 3 */
#define SP_HPD_STATUS BIT(6)
+#define SP_HPD_FORCE BIT(5)
+#define SP_HPD_CTRL BIT(4)
#define SP_STRM_VALID BIT(2)
+#define SP_STRM_FORCE BIT(1)
+#define SP_STRM_CTRL BIT(0)
/* Bits for DP System Control Register 4 */
#define SP_ENHANCED_MODE BIT(3)
@@ -119,6 +123,9 @@
#define SP_LINK_BW_SET_MASK 0x1f
#define SP_INITIAL_SLIM_M_AUD_SEL BIT(5)
+/* DP Lane Count Setting Register */
+#define SP_DP_LANE_COUNT_SET_REG 0xa1
+
/* DP Training Pattern Set Register */
#define SP_DP_TRAINING_PATTERN_SET_REG 0xa2
@@ -132,6 +139,7 @@
/* DP Link Training Control Register */
#define SP_DP_LT_CTRL_REG 0xa8
+#define SP_DP_LT_INPROGRESS 0x80
#define SP_LT_ERROR_TYPE_MASK 0x70
# define SP_LT_NO_ERROR 0x00
# define SP_LT_AUX_WRITE_ERROR 0x01
diff --git a/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h b/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h
index c1030e0f74cc..9fa6f426f990 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h
+++ b/drivers/gpu/drm/bridge/analogix/analogix-i2c-txcommon.h
@@ -179,6 +179,9 @@
#define SP_VBIT BIT(1)
#define SP_AUDIO_LAYOUT BIT(0)
+/* Analog Debug Register 1 */
+#define SP_ANALOG_DEBUG1_REG 0xdc
+
/* Analog Debug Register 2 */
#define SP_ANALOG_DEBUG2_REG 0xdd
#define SP_FORCE_SW_OFF_BYPASS 0x20
--
2.16.4
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