Hi Neil,
On 21-03-2017 15:12, Neil Armstrong wrote:
> From: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
>
> 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@xxxxxxxxxxxxxxxx>
> Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Reviewed-by: Jose Abreu <joabreu@xxxxxxxxxxxx>
Maybe if you submit a next version we could get rid of
"dw_hdmi_fb_registered" totally and move the remaining setup code
to a new "dw_hdmi_setup_i2c" function.
Best regards,
Jose Miguel Abreu
> ---
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 50 ++++++++++++++-----------------
> 1 file changed, 23 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index af93f7a..f82750a 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1559,7 +1559,7 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
> }
>
> /* Wait until we are registered to enable interrupts */
> -static int dw_hdmi_fb_registered(struct dw_hdmi *hdmi)
> +static void dw_hdmi_fb_registered(struct dw_hdmi *hdmi)
> {
> hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL,
> HDMI_PHY_I2CM_INT_ADDR);
> @@ -1567,15 +1567,6 @@ 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 +1684,26 @@ 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 +2215,14 @@ 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_fb_registered(hdmi);
> + dw_hdmi_phy_setup_hpd(hdmi);
>
> memset(&pdevinfo, 0, sizeof(pdevinfo));
> pdevinfo.parent = dev;
