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Subject[PATCH v5 1/6] drm: bridge: dw-hdmi: Extract PHY interrupt setup to a function
Date
From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

In preparation for adding PHY operations to handle RX SENSE and HPD,
group all the PHY interrupt setup code in a single location and extract
it to a separate function.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
[narmstrong: renamed dw_hdmi_fb_registered to dw_hdmi_setup_i2c]

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 51 ++++++++++++++-----------------
1 file changed, 23 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 32f02e9..ff1fae3 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1558,8 +1558,7 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
return 0;
}

-/* Wait until we are registered to enable interrupts */
-static int dw_hdmi_fb_registered(struct dw_hdmi *hdmi)
+static void dw_hdmi_setup_i2c(struct dw_hdmi *hdmi)
{
hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL,
HDMI_PHY_I2CM_INT_ADDR);
@@ -1567,15 +1566,6 @@ static int dw_hdmi_fb_registered(struct dw_hdmi *hdmi)
hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL |
HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL,
HDMI_PHY_I2CM_CTLINT_ADDR);
-
- /* enable cable hot plug irq */
- hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
-
- /* Clear Hotplug interrupts */
- hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
- HDMI_IH_PHY_STAT0);
-
- return 0;
}

static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
@@ -1693,6 +1683,26 @@ static void dw_hdmi_update_phy_mask(struct dw_hdmi *hdmi)
hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
}

+static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi)
+{
+ /*
+ * Configure the PHY RX SENSE and HPD interrupts polarities and clear
+ * any pending interrupt.
+ */
+ hdmi_writeb(hdmi, HDMI_PHY_HPD | HDMI_PHY_RX_SENSE, HDMI_PHY_POL0);
+ hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
+ HDMI_IH_PHY_STAT0);
+
+ /* Enable cable hot plug irq. */
+ hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
+
+ /* Clear and unmute interrupts. */
+ hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
+ HDMI_IH_PHY_STAT0);
+ hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
+ HDMI_IH_MUTE_PHY_STAT0);
+}
+
static enum drm_connector_status
dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
{
@@ -2204,29 +2214,14 @@ static int dw_hdmi_detect_phy(struct dw_hdmi *hdmi)
hdmi->ddc = NULL;
}

- /*
- * Configure registers related to HDMI interrupt
- * generation before registering IRQ.
- */
- hdmi_writeb(hdmi, HDMI_PHY_HPD | HDMI_PHY_RX_SENSE, HDMI_PHY_POL0);
-
- /* Clear Hotplug interrupts */
- hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
- HDMI_IH_PHY_STAT0);
-
hdmi->bridge.driver_private = hdmi;
hdmi->bridge.funcs = &dw_hdmi_bridge_funcs;
#ifdef CONFIG_OF
hdmi->bridge.of_node = pdev->dev.of_node;
#endif

- ret = dw_hdmi_fb_registered(hdmi);
- if (ret)
- goto err_iahb;
-
- /* Unmute interrupts */
- hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
- HDMI_IH_MUTE_PHY_STAT0);
+ dw_hdmi_setup_i2c(hdmi);
+ dw_hdmi_phy_setup_hpd(hdmi);

memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.parent = dev;
--
1.9.1
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