drm: bridge: dw-hdmi: Extract PHY interrupt setup to a function

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]
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 32f02e9..ff1fae3 100644 (file)
--- 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 @@ __dw_hdmi_probe(struct platform_device *pdev,
                        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;