From: Jernej Skrabec <jernej.skrabec@siol.net>
Date: Wed, 14 Feb 2018 21:08:58 +0100
Subject: drm/bridge/synopsys: dw-hdmi: Export some PHY related functions
Git-commit: 5765916afa4e859b92457a4a14f82ef2a9876758
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Parts of PHY code could be useful also for custom PHYs. For example,
Allwinner A83T has custom PHY which is probably Synopsys gen2 PHY
with few additional memory mapped registers, so most of the Synopsys PHY
related code could be reused.
Functions exported here are actually not specific to Synopsys PHYs but
to DWC HDMI controller PHY interface. This means that even if the PHY is
completely custom, i.e. not designed by Synopsys, exported functions can
be useful.
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180214200906.31509-5-jernej.skrabec@siol.net
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 44 ++++++++++++++++++++----------
drivers/gpu/drm/meson/meson_dw_hdmi.c | 8 ++---
include/drm/bridge/dw_hdmi.h | 11 +++++++
3 files changed, 45 insertions(+), 18 deletions(-)
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1037,19 +1037,21 @@ static void dw_hdmi_phy_enable_svsret(st
HDMI_PHY_CONF0_SVSRET_MASK);
}
-static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
{
hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
-static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
{
hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
{
@@ -1065,6 +1067,22 @@ static void dw_hdmi_phy_sel_interface_co
HDMI_PHY_CONF0_SELDIPIF_MASK);
}
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi)
+{
+ /* PHY reset. The reset signal is active high on Gen2 PHYs. */
+ hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
+ hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset);
+
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
+{
+ hdmi_phy_test_clear(hdmi, 1);
+ hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
+ hdmi_phy_test_clear(hdmi, 0);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
+
static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
{
const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
@@ -1203,16 +1221,11 @@ static int hdmi_phy_configure(struct dw_
if (phy->has_svsret)
dw_hdmi_phy_enable_svsret(hdmi, 1);
- /* PHY reset. The reset signal is active high on Gen2 PHYs. */
- hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
- hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+ dw_hdmi_phy_reset(hdmi);
hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
- hdmi_phy_test_clear(hdmi, 1);
- hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
- HDMI_PHY_I2CM_SLAVE_ADDR);
- hdmi_phy_test_clear(hdmi, 0);
+ dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
/* Write to the PHY as configured by the platform */
if (pdata->configure_phy)
@@ -1251,15 +1264,16 @@ static void dw_hdmi_phy_disable(struct d
dw_hdmi_phy_power_off(hdmi);
}
-static enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
- void *data)
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+ void *data)
{
return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
connector_status_connected : connector_status_disconnected;
}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
-static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
- bool force, bool disabled, bool rxsense)
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+ bool force, bool disabled, bool rxsense)
{
u8 old_mask = hdmi->phy_mask;
@@ -1271,8 +1285,9 @@ static void dw_hdmi_phy_update_hpd(struc
if (old_mask != hdmi->phy_mask)
hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
-static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
{
/*
* Configure the PHY RX SENSE and HPD interrupts polarities and clear
@@ -1291,6 +1306,7 @@ static void dw_hdmi_phy_setup_hpd(struct
hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
HDMI_IH_MUTE_PHY_STAT0);
}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
.init = dw_hdmi_phy_init,
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -302,7 +302,7 @@ static void meson_hdmi_phy_setup_mode(st
}
}
-static inline void dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
+static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
{
struct meson_drm *priv = dw_hdmi->priv;
@@ -409,9 +409,9 @@ static int dw_hdmi_phy_init(struct dw_hd
msleep(100);
/* Reset PHY 3 times in a row */
- dw_hdmi_phy_reset(dw_hdmi);
- dw_hdmi_phy_reset(dw_hdmi);
- dw_hdmi_phy_reset(dw_hdmi);
+ meson_dw_hdmi_phy_reset(dw_hdmi);
+ meson_dw_hdmi_phy_reset(dw_hdmi);
+ meson_dw_hdmi_phy_reset(dw_hdmi);
/* Temporary Disable VENC video stream */
if (priv->venc.hdmi_use_enci)
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -157,7 +157,18 @@ void dw_hdmi_audio_enable(struct dw_hdmi
void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
/* PHY configuration */
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address);
void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
unsigned char addr);
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi);
+
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+ void *data);
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+ bool force, bool disabled, bool rxsense);
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data);
+
#endif /* __IMX_HDMI_H__ */