Hi,
On 14/05/2020 03:17, Laurent Pinchart wrote:
> Platform glue drivers for dw_hdmi may need to access device-specific
> data from their .mode_valid() implementation. They currently have no
> clean way to do so, and one driver hacks around it by accessing the
> dev_private data of the drm_device retrieved from the connector.
>
> Pass the dw_hdmi pointer to .mode_valid() in order give context
> information to drivers, and add a dw_hdmi_device() to retrieve the
> struct device related to the context.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
> ---
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 13 ++++++++++++-
> drivers/gpu/drm/imx/dw_hdmi-imx.c | 4 ++--
> drivers/gpu/drm/meson/meson_dw_hdmi.c | 3 ++-
> drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c | 2 +-
> drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 3 ++-
> drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 6 ++++--
> drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h | 3 ++-
> include/drm/bridge/dw_hdmi.h | 4 +++-
> 8 files changed, 28 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 30681398cfb0..97c7a9a4983c 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2778,7 +2778,8 @@ dw_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
> return MODE_BAD;
>
> if (hdmi->plat_data->mode_valid)
> - mode_status = hdmi->plat_data->mode_valid(connector, mode);
> + mode_status = hdmi->plat_data->mode_valid(hdmi, connector,
> + mode);
Can't it pass `struct dw_hdmi *hdmi, void *data` like the phy_ops ?
>
> return mode_status;
> }
> @@ -3395,6 +3396,16 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
> i2c_put_adapter(hdmi->ddc);
> }
>
> +/*
> + * Retrieve the device passed to the dw_hdmi_probe() or dw_hdmi_bind()
> + * functions.
> + */
> +struct device *dw_hdmi_device(struct dw_hdmi *hdmi)
> +{
> + return hdmi->dev;
> +}
> +EXPORT_SYMBOL_GPL(dw_hdmi_device);
This looks really hackish, passing data like the phy_ops looks cleaner.
> +
> /*
> -----------------------------------------------------------------------------
> * Probe/remove API, used from platforms based on the DRM bridge API.
> */
> diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c
> b/drivers/gpu/drm/imx/dw_hdmi-imx.c
> index ba4ca17fd4d8..ff5b03a4a86a 100644
> --- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
> +++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
> @@ -145,7 +145,7 @@ static const struct drm_encoder_helper_funcs
> dw_hdmi_imx_encoder_helper_funcs =
> };
>
> static enum drm_mode_status
> -imx6q_hdmi_mode_valid(struct drm_connector *con,
> +imx6q_hdmi_mode_valid(struct dw_hdmi *hdmi, struct drm_connector *con,
> const struct drm_display_mode *mode)
> {
> if (mode->clock < 13500)
> @@ -158,7 +158,7 @@ imx6q_hdmi_mode_valid(struct drm_connector *con,
> }
>
> static enum drm_mode_status
> -imx6dl_hdmi_mode_valid(struct drm_connector *con,
> +imx6dl_hdmi_mode_valid(struct dw_hdmi *hdmi, struct drm_connector *con,
> const struct drm_display_mode *mode)
> {
> if (mode->clock < 13500)
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index 5be963e9db05..174d45ecdeda 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -630,7 +630,8 @@ static irqreturn_t dw_hdmi_top_thread_irq(int irq, void
> *dev_id)
> }
>
> static enum drm_mode_status
> -dw_hdmi_mode_valid(struct drm_connector *connector,
> +dw_hdmi_mode_valid(struct dw_hdmi *hdmi,
> + struct drm_connector *connector,
> const struct drm_display_mode *mode)
> {
> struct meson_drm *priv = connector->dev->dev_private;
> diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
> b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
> index 452461dc96f2..3d2fdbeeb82d 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
> @@ -38,7 +38,7 @@ static const struct rcar_hdmi_phy_params
> rcar_hdmi_phy_params[] = {
> };
>
> static enum drm_mode_status
> -rcar_hdmi_mode_valid(struct drm_connector *connector,
> +rcar_hdmi_mode_valid(struct dw_hdmi *hdmi, struct drm_connector *connector,
> const struct drm_display_mode *mode)
> {
> /*
> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> index 121aa8a63a76..32acfe2c3f58 100644
> --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> @@ -220,7 +220,8 @@ static int rockchip_hdmi_parse_dt(struct rockchip_hdmi
> *hdmi)
> }
>
> static enum drm_mode_status
> -dw_hdmi_rockchip_mode_valid(struct drm_connector *connector,
> +dw_hdmi_rockchip_mode_valid(struct dw_hdmi *hdmi,
> + struct drm_connector *connector,
> const struct drm_display_mode *mode)
> {
> const struct dw_hdmi_mpll_config *mpll_cfg = rockchip_mpll_cfg;
> diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> index 972682bb8000..055ffefd1b60 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
> @@ -31,7 +31,8 @@ sun8i_dw_hdmi_encoder_helper_funcs = {
> };
>
> static enum drm_mode_status
> -sun8i_dw_hdmi_mode_valid_a83t(struct drm_connector *connector,
> +sun8i_dw_hdmi_mode_valid_a83t(struct dw_hdmi *hdmi,
> + struct drm_connector *connector,
> const struct drm_display_mode *mode)
> {
> if (mode->clock > 297000)
> @@ -41,7 +42,8 @@ sun8i_dw_hdmi_mode_valid_a83t(struct drm_connector
> *connector,
> }
>
> static enum drm_mode_status
> -sun8i_dw_hdmi_mode_valid_h6(struct drm_connector *connector,
> +sun8i_dw_hdmi_mode_valid_h6(struct dw_hdmi *hdmi,
> + struct drm_connector *connector,
> const struct drm_display_mode *mode)
> {
> /*
> diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> index 8e64945167e9..f831cb351d72 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
> @@ -176,7 +176,8 @@ struct sun8i_hdmi_phy {
> };
>
> struct sun8i_dw_hdmi_quirks {
> - enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
> + enum drm_mode_status (*mode_valid)(struct dw_hdmi *hdmi,
> + struct drm_connector *connector,
> const struct drm_display_mode *mode);
> unsigned int set_rate : 1;
> unsigned int use_drm_infoframe : 1;
> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index 0b34a12c4a1c..c98010a53683 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -124,7 +124,8 @@ struct dw_hdmi_phy_ops {
>
> struct dw_hdmi_plat_data {
> struct regmap *regm;
> - enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
> + enum drm_mode_status (*mode_valid)(struct dw_hdmi *hdmi,
> + struct drm_connector *connector,
> const struct drm_display_mode *mode);
> unsigned long input_bus_format;
> unsigned long input_bus_encoding;
> @@ -153,6 +154,7 @@ void dw_hdmi_unbind(struct dw_hdmi *hdmi);
> struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
> struct drm_encoder *encoder,
> const struct dw_hdmi_plat_data *plat_data);
> +struct device *dw_hdmi_device(struct dw_hdmi *hdmi);
>
> void dw_hdmi_resume(struct dw_hdmi *hdmi);
>
>
Thanks,
Neil
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