Hi! Dne torek, 14. september 2021 ob 10:59:22 CEST je Ondřej Jirman napisal(a): > Hello Jernej, > > On Mon, Sep 13, 2021 at 07:21:54PM +0200, Jernej Skrabec wrote: > > Recent rework, which made HDMI PHY driver a platform device, inadvertely > > reversed clock setup order. HW is very touchy about it. Proper way is to > > handle controllers resets and clocks first and HDMI PHYs second. > > > > Currently, without this fix, first mode set completely fails (nothing on > > HDMI monitor) on H3 era PHYs. On H6, it still somehow work. > > > > Move HDMI PHY reset & clocks handling to sun8i_hdmi_phy_init() which > > will assure that code is executed after controllers reset & clocks are > > handled. Additionally, add sun8i_hdmi_phy_deinit() which will deinit > > them at controllers driver unload. > > > > Tested on A64, H3, H6 and R40. > > > > Fixes: 9bf3797796f5 ("drm/sun4i: dw-hdmi: Make HDMI PHY into a platform device") > > Signed-off-by: Jernej Skrabec <jernej.skrabec@xxxxxxxxx> > > --- > > drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 7 +- > > drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h | 4 +- > > drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c | 97 ++++++++++++++------------ > > 3 files changed, 61 insertions(+), 47 deletions(-) > > > > diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/ sun8i_dw_hdmi.c > > index f75fb157f2ff..5fa5407ac583 100644 > > --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c > > +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c > > @@ -216,11 +216,13 @@ static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master, > > goto err_disable_clk_tmds; > > } > > ^^^ This looks like... > > > + ret = sun8i_hdmi_phy_init(hdmi->phy); > > + if (ret) > > + return ret; > > ... you need 'goto err_disable_clk_tmds;' here, instead. Ah, right. Will fix in v2. > > > + > > drm_encoder_helper_add(encoder, &sun8i_dw_hdmi_encoder_helper_funcs); > > drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS); > > > > - sun8i_hdmi_phy_init(hdmi->phy); > > - > > plat_data->mode_valid = hdmi->quirks->mode_valid; > > plat_data->use_drm_infoframe = hdmi->quirks->use_drm_infoframe; > > sun8i_hdmi_phy_set_ops(hdmi->phy, plat_data); > > @@ -262,6 +264,7 @@ static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master, > > struct sun8i_dw_hdmi *hdmi = dev_get_drvdata(dev); > > > > dw_hdmi_unbind(hdmi->hdmi); > > + sun8i_hdmi_phy_deinit(hdmi->phy); > > clk_disable_unprepare(hdmi->clk_tmds); > > reset_control_assert(hdmi->rst_ctrl); > > gpiod_set_value(hdmi->ddc_en, 0); > > diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h b/drivers/gpu/drm/sun4i/ sun8i_dw_hdmi.h > > index 74f6ed0e2570..bffe1b9cd3dc 100644 > > --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h > > +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h > > @@ -169,6 +169,7 @@ struct sun8i_hdmi_phy { > > struct clk *clk_phy; > > struct clk *clk_pll0; > > struct clk *clk_pll1; > > + struct device *dev; > > unsigned int rcal; > > struct regmap *regs; > > struct reset_control *rst_phy; > > @@ -205,7 +206,8 @@ encoder_to_sun8i_dw_hdmi(struct drm_encoder *encoder) > > > > int sun8i_hdmi_phy_get(struct sun8i_dw_hdmi *hdmi, struct device_node *node); > > > > -void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy); > > +int sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy); > > +void sun8i_hdmi_phy_deinit(struct sun8i_hdmi_phy *phy); > > void sun8i_hdmi_phy_set_ops(struct sun8i_hdmi_phy *phy, > > struct dw_hdmi_plat_data *plat_data); > > > > diff --git a/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c b/drivers/gpu/drm/ sun4i/sun8i_hdmi_phy.c > > index c9239708d398..78b152973957 100644 > > --- a/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c > > +++ b/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c > > @@ -506,9 +506,60 @@ static void sun8i_hdmi_phy_init_h3(struct sun8i_hdmi_phy *phy) > > phy->rcal = (val & SUN8I_HDMI_PHY_ANA_STS_RCAL_MASK) >> 2; > > } > > > > -void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy) > > +int sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy) > > { > > + int ret; > > + > > + ret = reset_control_deassert(phy->rst_phy); > > + if (ret) { > > + dev_err(phy->dev, "Cannot deassert phy reset control: %d\n", ret); > > + return ret; > > + } > > + > > + ret = clk_prepare_enable(phy->clk_bus); > > + if (ret) { > > + dev_err(phy->dev, "Cannot enable bus clock: %d\n", ret); > > + goto err_deassert_rst_phy; > > I know it was there before, but please: > > s/deassert/assert/ Ok. Best regards, Jernej > > kind regards, > o. > > > + } > > + > > + ret = clk_prepare_enable(phy->clk_mod); > > + if (ret) { > > + dev_err(phy->dev, "Cannot enable mod clock: %d\n", ret); > > + goto err_disable_clk_bus; > > + } > > + > > + if (phy->variant->has_phy_clk) { > > + ret = sun8i_phy_clk_create(phy, phy->dev, > > + phy->variant- >has_second_pll); > > + if (ret) { > > + dev_err(phy->dev, "Couldn't create the PHY clock\n"); > > + goto err_disable_clk_mod; > > + } > > + > > + clk_prepare_enable(phy->clk_phy); > > + } > > + > > phy->variant->phy_init(phy); > > + > > + return 0; > > + > > +err_disable_clk_mod: > > + clk_disable_unprepare(phy->clk_mod); > > +err_disable_clk_bus: > > + clk_disable_unprepare(phy->clk_bus); > > +err_deassert_rst_phy: > > + reset_control_assert(phy->rst_phy); > > + > > + return ret; > > +} > > + > > > > [......] >