Re: [PATCH v8 7/8] drm/bridge/synopsys: dw-hdmi: Do not use device's drvdata

From: Heiko Stübner
Date: Thu Mar 01 2018 - 10:46:14 EST

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Am Mittwoch, 10. Januar 2018, 17:23:47 CET schrieb Thierry Escande:
> From: Jeffy Chen <jeffy.chen@xxxxxxxxxxxxxx>
>
> Let plat drivers own the drvdata, so that they could cleanup resources
> in their unbind().
>
> Signed-off-by: Jeffy Chen <jeffy.chen@xxxxxxxxxxxxxx>
> Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx>
> Reviewed-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>

This looks like it is probably superseeded by
"drm/bridge/synopsys: dw-hdmi: don't clobber drvdata" [0] ?

If there are still necessary things in it, it will need to be adapted for
the recent addition of the sunxi dw-hdmi variant.

Heiko

[0] https://cgit.freedesktop.org/drm/drm-misc/commit/?id=eea034af90c64802fd747a9dc534c26a7ebe7754

> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 43
> ++++++++++------------------- drivers/gpu/drm/imx/dw_hdmi-imx.c |
> 22 +++++++++------
> drivers/gpu/drm/meson/meson_dw_hdmi.c | 20 ++++++++++----
> drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c | 14 ++++++++--
> drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 22 +++++++++------
> include/drm/bridge/dw_hdmi.h | 17 ++++++------
> 6 files changed, 77 insertions(+), 61 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index
> 1cc63a18b7d5..f0380bcae513 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2073,7 +2073,7 @@ static irqreturn_t dw_hdmi_hardirq(int irq, void
> *dev_id) return ret;
> }
>
> -void __dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool
> rx_sense) +void dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool
> rx_sense) {
> mutex_lock(&hdmi->mutex);
>
> @@ -2099,13 +2099,6 @@ void __dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi,
> bool hpd, bool rx_sense) }
> mutex_unlock(&hdmi->mutex);
> }
> -
> -void dw_hdmi_setup_rx_sense(struct device *dev, bool hpd, bool rx_sense)
> -{
> - struct dw_hdmi *hdmi = dev_get_drvdata(dev);
> -
> - __dw_hdmi_setup_rx_sense(hdmi, hpd, rx_sense);
> -}
> EXPORT_SYMBOL_GPL(dw_hdmi_setup_rx_sense);
>
> static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
> @@ -2141,9 +2134,8 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
> */
> if (intr_stat &
> (HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_IH_PHY_STAT0_HPD)) {
> - __dw_hdmi_setup_rx_sense(hdmi,
> - phy_stat & HDMI_PHY_HPD,
> - phy_stat & HDMI_PHY_RX_SENSE);
> + dw_hdmi_setup_rx_sense(hdmi, phy_stat & HDMI_PHY_HPD,
> + phy_stat & HDMI_PHY_RX_SENSE);
>
> if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0)
> cec_notifier_set_phys_addr(hdmi->cec_notifier,
> @@ -2533,8 +2525,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
> if (hdmi->i2c)
> dw_hdmi_i2c_init(hdmi);
>
> - platform_set_drvdata(pdev, hdmi);
> -
> return hdmi;
>
> err_iahb:
> @@ -2584,25 +2574,23 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
> /*
> ---------------------------------------------------------------------------
> -- * Probe/remove API, used from platforms based on the DRM bridge API. */
> -int dw_hdmi_probe(struct platform_device *pdev,
> - const struct dw_hdmi_plat_data *plat_data)
> +struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
> + const struct dw_hdmi_plat_data *plat_data)
> {
> struct dw_hdmi *hdmi;
>
> hdmi = __dw_hdmi_probe(pdev, plat_data);
> if (IS_ERR(hdmi))
> - return PTR_ERR(hdmi);
> + return hdmi;
>
> drm_bridge_add(&hdmi->bridge);
>
> - return 0;
> + return hdmi;
> }
> EXPORT_SYMBOL_GPL(dw_hdmi_probe);
>
> -void dw_hdmi_remove(struct platform_device *pdev)
> +void dw_hdmi_remove(struct dw_hdmi *hdmi)
> {
> - struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
> -
> drm_bridge_remove(&hdmi->bridge);
>
> __dw_hdmi_remove(hdmi);
> @@ -2612,31 +2600,30 @@ EXPORT_SYMBOL_GPL(dw_hdmi_remove);
> /*
> ---------------------------------------------------------------------------
> -- * Bind/unbind API, used from platforms based on the component framework.
> */
> -int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
> - const struct dw_hdmi_plat_data *plat_data)
> +struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
> + struct drm_encoder *encoder,
> + const struct dw_hdmi_plat_data *plat_data)
> {
> struct dw_hdmi *hdmi;
> int ret;
>
> hdmi = __dw_hdmi_probe(pdev, plat_data);
> if (IS_ERR(hdmi))
> - return PTR_ERR(hdmi);
> + return hdmi;
>
> ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL);
> if (ret) {
> __dw_hdmi_remove(hdmi);
> DRM_ERROR("Failed to initialize bridge with drm\n");
> - return ret;
> + return ERR_PTR(ret);
> }
>
> - return 0;
> + return hdmi;
> }
> EXPORT_SYMBOL_GPL(dw_hdmi_bind);
>
> -void dw_hdmi_unbind(struct device *dev)
> +void dw_hdmi_unbind(struct dw_hdmi *hdmi)
> {
> - struct dw_hdmi *hdmi = dev_get_drvdata(dev);
> -
> __dw_hdmi_remove(hdmi);
> }
> EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
> diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c
> b/drivers/gpu/drm/imx/dw_hdmi-imx.c index b62763aa8706..b01d03e02ce0 100644
> --- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
> +++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
> @@ -26,6 +26,8 @@ struct imx_hdmi {
> struct device *dev;
> struct drm_encoder encoder;
> struct regmap *regmap;
> +
> + struct dw_hdmi *hdmi;
> };
>
> static inline struct imx_hdmi *enc_to_imx_hdmi(struct drm_encoder *e)
> @@ -239,22 +241,24 @@ static int dw_hdmi_imx_bind(struct device *dev, struct
> device *master, drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
> DRM_MODE_ENCODER_TMDS, NULL);
>
> - ret = dw_hdmi_bind(pdev, encoder, plat_data);
> + hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
> + if (IS_ERR(hdmi->hdmi)) {
> + encoder->funcs->destroy(encoder);
> + return PTR_ERR(hdmi->hdmi);
> + }
>
> - /*
> - * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
> - * which would have called the encoder cleanup. Do it manually.
> - */
> - if (ret)
> - drm_encoder_cleanup(encoder);
> + dev_set_drvdata(dev, hdmi);
>
> - return ret;
> + return 0;
> }
>
> static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
> void *data)
> {
> - return dw_hdmi_unbind(dev);
> + struct imx_hdmi *hdmi = dev_get_drvdata(dev);
> +
> + dw_hdmi_unbind(hdmi->hdmi);
> + hdmi->encoder.funcs->destroy(&hdmi->encoder);
> }
>
> static const struct component_ops dw_hdmi_imx_ops = {
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> b/drivers/gpu/drm/meson/meson_dw_hdmi.c index 17de3afd98f6..3f1ec9a5cbfb
> 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -140,6 +140,8 @@ struct meson_dw_hdmi {
> struct clk *venci_clk;
> struct regulator *hdmi_supply;
> u32 irq_stat;
> +
> + struct dw_hdmi *hdmi;
> };
> #define encoder_to_meson_dw_hdmi(x) \
> container_of(x, struct meson_dw_hdmi, encoder)
> @@ -528,7 +530,7 @@ static irqreturn_t dw_hdmi_top_thread_irq(int irq, void
> *dev_id) if (stat & HDMITX_TOP_INTR_HPD_RISE)
> hpd_connected = true;
>
> - dw_hdmi_setup_rx_sense(dw_hdmi->dev, hpd_connected,
> + dw_hdmi_setup_rx_sense(dw_hdmi->hdmi, hpd_connected,
> hpd_connected);
>
> drm_helper_hpd_irq_event(dw_hdmi->encoder.dev);
> @@ -878,9 +880,14 @@ static int meson_dw_hdmi_bind(struct device *dev,
> struct device *master, dw_plat_data->input_bus_format =
> MEDIA_BUS_FMT_YUV8_1X24;
> dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
>
> - ret = dw_hdmi_bind(pdev, encoder, &meson_dw_hdmi->dw_plat_data);
> - if (ret)
> - return ret;
> + meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
> + &meson_dw_hdmi->dw_plat_data);
> + if (IS_ERR(meson_dw_hdmi->hdmi)) {
> + encoder->funcs->destroy(encoder);
> + return PTR_ERR(meson_dw_hdmi->hdmi);
> + }
> +
> + dev_set_drvdata(dev, meson_dw_hdmi);
>
> DRM_DEBUG_DRIVER("HDMI controller initialized\n");
>
> @@ -890,7 +897,10 @@ static int meson_dw_hdmi_bind(struct device *dev,
> struct device *master, static void meson_dw_hdmi_unbind(struct device *dev,
> struct device *master, void *data)
> {
> - dw_hdmi_unbind(dev);
> + struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
> +
> + dw_hdmi_unbind(meson_dw_hdmi->hdmi);
> + meson_dw_hdmi->encoder.funcs->destroy(&meson_dw_hdmi->encoder);
> }
>
> static const struct component_ops meson_dw_hdmi_ops = {
> diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
> b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c index dc85b53d58ef..76210ae25094
> 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
> @@ -68,12 +68,22 @@ static const struct dw_hdmi_plat_data
> rcar_dw_hdmi_plat_data = {
>
> static int rcar_dw_hdmi_probe(struct platform_device *pdev)
> {
> - return dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
> + struct dw_hdmi *hdmi;
> +
> + hdmi = dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
> + if (IS_ERR(hdmi))
> + return PTR_ERR(hdmi);
> +
> + platform_set_drvdata(pdev, hdmi);
> +
> + return 0;
> }
>
> static int rcar_dw_hdmi_remove(struct platform_device *pdev)
> {
> - dw_hdmi_remove(pdev);
> + struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
> +
> + dw_hdmi_remove(hdmi);
>
> return 0;
> }
> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c index
> 1eb02a82fd91..d406d7779ed9 100644
> --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> @@ -48,6 +48,8 @@ struct rockchip_hdmi {
> const struct rockchip_hdmi_chip_data *chip_data;
> struct clk *vpll_clk;
> struct clk *grf_clk;
> +
> + struct dw_hdmi *hdmi;
> };
>
> #define to_rockchip_hdmi(x) container_of(x, struct rockchip_hdmi, x)
> @@ -377,22 +379,24 @@ static int dw_hdmi_rockchip_bind(struct device *dev,
> struct device *master, drm_encoder_init(drm, encoder,
> &dw_hdmi_rockchip_encoder_funcs,
> DRM_MODE_ENCODER_TMDS, NULL);
>
> - ret = dw_hdmi_bind(pdev, encoder, plat_data);
> + hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
> + if (IS_ERR(hdmi->hdmi)) {
> + encoder->funcs->destroy(encoder);
> + return PTR_ERR(hdmi->hdmi);
> + }
>
> - /*
> - * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
> - * which would have called the encoder cleanup. Do it manually.
> - */
> - if (ret)
> - drm_encoder_cleanup(encoder);
> + dev_set_drvdata(dev, hdmi);
>
> - return ret;
> + return 0;
> }
>
> static void dw_hdmi_rockchip_unbind(struct device *dev, struct device
> *master, void *data)
> {
> - return dw_hdmi_unbind(dev);
> + struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
> +
> + dw_hdmi_unbind(hdmi->hdmi);
> + hdmi->encoder.funcs->destroy(&hdmi->encoder);
> }
>
> static const struct component_ops dw_hdmi_rockchip_ops = {
> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index 182f83283e24..29b8900caaf7 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -143,14 +143,15 @@ struct dw_hdmi_plat_data {
> unsigned long mpixelclock);
> };
>
> -int dw_hdmi_probe(struct platform_device *pdev,
> - const struct dw_hdmi_plat_data *plat_data);
> -void dw_hdmi_remove(struct platform_device *pdev);
> -void dw_hdmi_unbind(struct device *dev);
> -int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
> - const struct dw_hdmi_plat_data *plat_data);
> -
> -void dw_hdmi_setup_rx_sense(struct device *dev, bool hpd, bool rx_sense);
> +struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
> + const struct dw_hdmi_plat_data *plat_data);
> +void dw_hdmi_remove(struct dw_hdmi *hdmi);
> +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);
> +
> +void dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool rx_sense);
>
> void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate);
> void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);

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