| Message ID | 64c6ab288d4d7159f633c860f1b23b3395491ae1.1637691240.git.hns@goldelico.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | MIPS: JZ4780 and CI20 HDMI | expand |
Hi Nikolaus, I keep seeing a few things, sorry. Le mar., nov. 23 2021 at 19:13:57 +0100, H. Nikolaus Schaller <hns@goldelico.com> a écrit : > From: Paul Boddie <paul@boddie.org.uk> > > A specialisation of the generic Synopsys HDMI driver is employed for > JZ4780 HDMI support. This requires a new driver, plus device tree and > configuration modifications. > > Here we add Kconfig DRM_INGENIC_DW_HDMI, Makefile and driver code. > > Signed-off-by: Paul Boddie <paul@boddie.org.uk> > Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> > Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> > --- > drivers/gpu/drm/ingenic/Kconfig | 9 ++ > drivers/gpu/drm/ingenic/Makefile | 1 + > drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c | 129 > ++++++++++++++++++++++ > 3 files changed, 139 insertions(+) > create mode 100644 drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c > > diff --git a/drivers/gpu/drm/ingenic/Kconfig > b/drivers/gpu/drm/ingenic/Kconfig > index 3b57f8be007c4..4efc709d77b0a 100644 > --- a/drivers/gpu/drm/ingenic/Kconfig > +++ b/drivers/gpu/drm/ingenic/Kconfig > @@ -25,4 +25,13 @@ config DRM_INGENIC_IPU > > The Image Processing Unit (IPU) will appear as a second primary > plane. > > +config DRM_INGENIC_DW_HDMI > + tristate "Ingenic specific support for Synopsys DW HDMI" > + depends on MACH_JZ4780 > + select DRM_DW_HDMI > + help > + Choose this option to enable Synopsys DesignWare HDMI based > driver. > + If you want to enable HDMI on Ingenic JZ4780 based SoC, you should > + select this option.. > + > endif > diff --git a/drivers/gpu/drm/ingenic/Makefile > b/drivers/gpu/drm/ingenic/Makefile > index d313326bdddbb..f10cc1c5a5f22 100644 > --- a/drivers/gpu/drm/ingenic/Makefile > +++ b/drivers/gpu/drm/ingenic/Makefile > @@ -1,3 +1,4 @@ > obj-$(CONFIG_DRM_INGENIC) += ingenic-drm.o > ingenic-drm-y = ingenic-drm-drv.o > ingenic-drm-$(CONFIG_DRM_INGENIC_IPU) += ingenic-ipu.o > +obj-$(CONFIG_DRM_INGENIC_DW_HDMI) += ingenic-dw-hdmi.o > diff --git a/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c > b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c > new file mode 100644 > index 0000000000000..c14890d6b9826 > --- /dev/null > +++ b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c > @@ -0,0 +1,129 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. > + * Copyright (C) 2019, 2020 Paul Boddie <paul@boddie.org.uk> > + * > + * Derived from dw_hdmi-imx.c with i.MX portions removed. > + * Probe and remove operations derived from rcar_dw_hdmi.c. > + */ > + > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > + > +#include <drm/bridge/dw_hdmi.h> > +#include <drm/drm_of.h> > +#include <drm/drm_print.h> > + > +static const struct dw_hdmi_mpll_config ingenic_mpll_cfg[] = { > + { 45250000, { { 0x01e0, 0x0000 }, { 0x21e1, 0x0000 }, { 0x41e2, > 0x0000 } } }, > + { 92500000, { { 0x0140, 0x0005 }, { 0x2141, 0x0005 }, { 0x4142, > 0x0005 } } }, > + { 148500000, { { 0x00a0, 0x000a }, { 0x20a1, 0x000a }, { 0x40a2, > 0x000a } } }, > + { 216000000, { { 0x00a0, 0x000a }, { 0x2001, 0x000f }, { 0x4002, > 0x000f } } }, > + { ~0UL, { { 0x0000, 0x0000 }, { 0x0000, 0x0000 }, { 0x0000, > 0x0000 } } } > +}; > + > +static const struct dw_hdmi_curr_ctrl ingenic_cur_ctr[] = { > + /*pixelclk bpp8 bpp10 bpp12 */ > + { 54000000, { 0x091c, 0x091c, 0x06dc } }, > + { 58400000, { 0x091c, 0x06dc, 0x06dc } }, > + { 72000000, { 0x06dc, 0x06dc, 0x091c } }, > + { 74250000, { 0x06dc, 0x0b5c, 0x091c } }, > + { 118800000, { 0x091c, 0x091c, 0x06dc } }, > + { 216000000, { 0x06dc, 0x0b5c, 0x091c } }, > + { ~0UL, { 0x0000, 0x0000, 0x0000 } }, > +}; > + > +/* > + * Resistance term 133Ohm Cfg > + * PREEMP config 0.00 > + * TX/CK level 10 > + */ > +static const struct dw_hdmi_phy_config ingenic_phy_config[] = { > + /*pixelclk symbol term vlev */ > + { 216000000, 0x800d, 0x0005, 0x01ad}, > + { ~0UL, 0x0000, 0x0000, 0x0000} > +}; > + > +static enum drm_mode_status > +ingenic_dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data, > + const struct drm_display_info *info, > + const struct drm_display_mode *mode) > +{ > + if (mode->clock < 13500) > + return MODE_CLOCK_LOW; > + /* FIXME: Hardware is capable of 270MHz, but setup data is missing. > */ > + if (mode->clock > 216000) > + return MODE_CLOCK_HIGH; > + > + return MODE_OK; > +} > + > +static struct dw_hdmi_plat_data ingenic_dw_hdmi_plat_data = { > + .mpll_cfg = ingenic_mpll_cfg, > + .cur_ctr = ingenic_cur_ctr, > + .phy_config = ingenic_phy_config, > + .mode_valid = ingenic_dw_hdmi_mode_valid, > + .output_port = 1, > +}; > + > +static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = { > + { .compatible = "ingenic,jz4780-dw-hdmi" }, > + { /* Sentinel */ }, > +}; > +MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids); > + > +static int ingenic_dw_hdmi_probe(struct platform_device *pdev) > +{ > + struct dw_hdmi *hdmi; > + struct regulator *regulator; > + int ret; > + > + hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data); > + if (IS_ERR(hdmi)) > + return PTR_ERR(hdmi); > + > + platform_set_drvdata(pdev, hdmi); > + > + regulator = devm_regulator_get_optional(&pdev->dev, "hdmi-5v"); > + Nit - you can remove this blank line. > + if (IS_ERR(regulator)) { > + ret = PTR_ERR(regulator); > + > + DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %s (%d)\n", > + "hdmi-5v", ret); > + return ret; > + } > + > + ret = regulator_enable(regulator); You used devm_regulator_get_optional(), so you are not guaranteed to obtain anything; your "regulator" variable might be a NULL pointer, so you can't just call regulator_enable() without checking it first. > + if (ret) { > + DRM_DEV_ERROR(&pdev->dev, "Failed to enable hpd regulator: %d\n", > + ret); > + return ret; > + } > + > + return 0; > +} > + > +static int ingenic_dw_hdmi_remove(struct platform_device *pdev) > +{ > + struct dw_hdmi *hdmi = platform_get_drvdata(pdev); > + > + dw_hdmi_remove(hdmi); You probably should disable the regulator (if not NULL) here. > + > + return 0; > +} > + > +static struct platform_driver ingenic_dw_hdmi_driver = { > + .probe = ingenic_dw_hdmi_probe, > + .remove = ingenic_dw_hdmi_remove, > + .driver = { > + .name = "dw-hdmi-ingenic", > + .of_match_table = ingenic_dw_hdmi_dt_ids, > + }, > +}; > + Nit - remove this blank line too. Cheers, -Paul > +module_platform_driver(ingenic_dw_hdmi_driver); > + > +MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension"); > +MODULE_LICENSE("GPL v2"); > +MODULE_ALIAS("platform:dwhdmi-ingenic"); > -- > 2.33.0 >
> Am 23.11.2021 um 21:05 schrieb Paul Cercueil <paul@crapouillou.net>: > > Hi Nikolaus, > > I keep seeing a few things, sorry. no problem. > > > Le mar., nov. 23 2021 at 19:13:57 +0100, H. Nikolaus Schaller <hns@goldelico.com> a écrit : >> From: Paul Boddie <paul@boddie.org.uk> >> A specialisation of the generic Synopsys HDMI driver is employed for >> JZ4780 HDMI support. This requires a new driver, plus device tree and >> configuration modifications. >> Here we add Kconfig DRM_INGENIC_DW_HDMI, Makefile and driver code. >> Signed-off-by: Paul Boddie <paul@boddie.org.uk> >> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> >> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> >> --- >> drivers/gpu/drm/ingenic/Kconfig | 9 ++ >> drivers/gpu/drm/ingenic/Makefile | 1 + >> drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c | 129 ++++++++++++++++++++++ >> 3 files changed, 139 insertions(+) >> create mode 100644 drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c >> diff --git a/drivers/gpu/drm/ingenic/Kconfig b/drivers/gpu/drm/ingenic/Kconfig >> index 3b57f8be007c4..4efc709d77b0a 100644 >> --- a/drivers/gpu/drm/ingenic/Kconfig >> +++ b/drivers/gpu/drm/ingenic/Kconfig >> @@ -25,4 +25,13 @@ config DRM_INGENIC_IPU >> The Image Processing Unit (IPU) will appear as a second primary plane. >> +config DRM_INGENIC_DW_HDMI >> + tristate "Ingenic specific support for Synopsys DW HDMI" >> + depends on MACH_JZ4780 >> + select DRM_DW_HDMI >> + help >> + Choose this option to enable Synopsys DesignWare HDMI based driver. >> + If you want to enable HDMI on Ingenic JZ4780 based SoC, you should >> + select this option.. >> + >> endif >> diff --git a/drivers/gpu/drm/ingenic/Makefile b/drivers/gpu/drm/ingenic/Makefile >> index d313326bdddbb..f10cc1c5a5f22 100644 >> --- a/drivers/gpu/drm/ingenic/Makefile >> +++ b/drivers/gpu/drm/ingenic/Makefile >> @@ -1,3 +1,4 @@ >> obj-$(CONFIG_DRM_INGENIC) += ingenic-drm.o >> ingenic-drm-y = ingenic-drm-drv.o >> ingenic-drm-$(CONFIG_DRM_INGENIC_IPU) += ingenic-ipu.o >> +obj-$(CONFIG_DRM_INGENIC_DW_HDMI) += ingenic-dw-hdmi.o >> diff --git a/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c >> new file mode 100644 >> index 0000000000000..c14890d6b9826 >> --- /dev/null >> +++ b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c >> @@ -0,0 +1,129 @@ >> +// SPDX-License-Identifier: GPL-2.0 >> +/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. >> + * Copyright (C) 2019, 2020 Paul Boddie <paul@boddie.org.uk> >> + * >> + * Derived from dw_hdmi-imx.c with i.MX portions removed. >> + * Probe and remove operations derived from rcar_dw_hdmi.c. >> + */ >> + >> +#include <linux/module.h> >> +#include <linux/platform_device.h> >> +#include <linux/regmap.h> >> + >> +#include <drm/bridge/dw_hdmi.h> >> +#include <drm/drm_of.h> >> +#include <drm/drm_print.h> >> + >> +static const struct dw_hdmi_mpll_config ingenic_mpll_cfg[] = { >> + { 45250000, { { 0x01e0, 0x0000 }, { 0x21e1, 0x0000 }, { 0x41e2, 0x0000 } } }, >> + { 92500000, { { 0x0140, 0x0005 }, { 0x2141, 0x0005 }, { 0x4142, 0x0005 } } }, >> + { 148500000, { { 0x00a0, 0x000a }, { 0x20a1, 0x000a }, { 0x40a2, 0x000a } } }, >> + { 216000000, { { 0x00a0, 0x000a }, { 0x2001, 0x000f }, { 0x4002, 0x000f } } }, >> + { ~0UL, { { 0x0000, 0x0000 }, { 0x0000, 0x0000 }, { 0x0000, 0x0000 } } } >> +}; >> + >> +static const struct dw_hdmi_curr_ctrl ingenic_cur_ctr[] = { >> + /*pixelclk bpp8 bpp10 bpp12 */ >> + { 54000000, { 0x091c, 0x091c, 0x06dc } }, >> + { 58400000, { 0x091c, 0x06dc, 0x06dc } }, >> + { 72000000, { 0x06dc, 0x06dc, 0x091c } }, >> + { 74250000, { 0x06dc, 0x0b5c, 0x091c } }, >> + { 118800000, { 0x091c, 0x091c, 0x06dc } }, >> + { 216000000, { 0x06dc, 0x0b5c, 0x091c } }, >> + { ~0UL, { 0x0000, 0x0000, 0x0000 } }, >> +}; >> + >> +/* >> + * Resistance term 133Ohm Cfg >> + * PREEMP config 0.00 >> + * TX/CK level 10 >> + */ >> +static const struct dw_hdmi_phy_config ingenic_phy_config[] = { >> + /*pixelclk symbol term vlev */ >> + { 216000000, 0x800d, 0x0005, 0x01ad}, >> + { ~0UL, 0x0000, 0x0000, 0x0000} >> +}; >> + >> +static enum drm_mode_status >> +ingenic_dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data, >> + const struct drm_display_info *info, >> + const struct drm_display_mode *mode) >> +{ >> + if (mode->clock < 13500) >> + return MODE_CLOCK_LOW; >> + /* FIXME: Hardware is capable of 270MHz, but setup data is missing. */ >> + if (mode->clock > 216000) >> + return MODE_CLOCK_HIGH; >> + >> + return MODE_OK; >> +} >> + >> +static struct dw_hdmi_plat_data ingenic_dw_hdmi_plat_data = { >> + .mpll_cfg = ingenic_mpll_cfg, >> + .cur_ctr = ingenic_cur_ctr, >> + .phy_config = ingenic_phy_config, >> + .mode_valid = ingenic_dw_hdmi_mode_valid, >> + .output_port = 1, >> +}; >> + >> +static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = { >> + { .compatible = "ingenic,jz4780-dw-hdmi" }, >> + { /* Sentinel */ }, >> +}; >> +MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids); >> + >> +static int ingenic_dw_hdmi_probe(struct platform_device *pdev) >> +{ >> + struct dw_hdmi *hdmi; >> + struct regulator *regulator; >> + int ret; >> + >> + hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data); >> + if (IS_ERR(hdmi)) >> + return PTR_ERR(hdmi); >> + >> + platform_set_drvdata(pdev, hdmi); >> + >> + regulator = devm_regulator_get_optional(&pdev->dev, "hdmi-5v"); >> + > > Nit - you can remove this blank line. ok. > >> + if (IS_ERR(regulator)) { >> + ret = PTR_ERR(regulator); >> + >> + DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %s (%d)\n", >> + "hdmi-5v", ret); >> + return ret; >> + } >> + >> + ret = regulator_enable(regulator); > > You used devm_regulator_get_optional(), so you are not guaranteed to obtain anything; your "regulator" variable might be a NULL pointer, so you can't just call regulator_enable() without checking it first. right. I forgot about that. > >> + if (ret) { >> + DRM_DEV_ERROR(&pdev->dev, "Failed to enable hpd regulator: %d\n", >> + ret); >> + return ret; >> + } >> + >> + return 0; >> +} >> + >> +static int ingenic_dw_hdmi_remove(struct platform_device *pdev) >> +{ >> + struct dw_hdmi *hdmi = platform_get_drvdata(pdev); >> + >> + dw_hdmi_remove(hdmi); > > You probably should disable the regulator (if not NULL) here. Indeed. Would it be ok to make struct regulator *regulator static or do we need dynamically allocated memory? > >> + >> + return 0; >> +} >> + >> +static struct platform_driver ingenic_dw_hdmi_driver = { >> + .probe = ingenic_dw_hdmi_probe, >> + .remove = ingenic_dw_hdmi_remove, >> + .driver = { >> + .name = "dw-hdmi-ingenic", >> + .of_match_table = ingenic_dw_hdmi_dt_ids, >> + }, >> +}; >> + > > Nit - remove this blank line too. ok. > > Cheers, > -Paul > >> +module_platform_driver(ingenic_dw_hdmi_driver); >> + >> +MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension"); >> +MODULE_LICENSE("GPL v2"); >> +MODULE_ALIAS("platform:dwhdmi-ingenic"); >> -- >> 2.33.0 > >
Hi Nikolaus, Le mer., nov. 24 2021 at 17:13:30 +0100, H. Nikolaus Schaller <hns@goldelico.com> a écrit : > > >> Am 23.11.2021 um 21:05 schrieb Paul Cercueil <paul@crapouillou.net>: >> >> Hi Nikolaus, >> >> I keep seeing a few things, sorry. > > no problem. > >> >> >> Le mar., nov. 23 2021 at 19:13:57 +0100, H. Nikolaus Schaller >> <hns@goldelico.com> a écrit : >>> From: Paul Boddie <paul@boddie.org.uk> >>> A specialisation of the generic Synopsys HDMI driver is employed >>> for >>> JZ4780 HDMI support. This requires a new driver, plus device tree >>> and >>> configuration modifications. >>> Here we add Kconfig DRM_INGENIC_DW_HDMI, Makefile and driver code. >>> Signed-off-by: Paul Boddie <paul@boddie.org.uk> >>> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> >>> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> >>> --- >>> drivers/gpu/drm/ingenic/Kconfig | 9 ++ >>> drivers/gpu/drm/ingenic/Makefile | 1 + >>> drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c | 129 >>> ++++++++++++++++++++++ >>> 3 files changed, 139 insertions(+) >>> create mode 100644 drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c >>> diff --git a/drivers/gpu/drm/ingenic/Kconfig >>> b/drivers/gpu/drm/ingenic/Kconfig >>> index 3b57f8be007c4..4efc709d77b0a 100644 >>> --- a/drivers/gpu/drm/ingenic/Kconfig >>> +++ b/drivers/gpu/drm/ingenic/Kconfig >>> @@ -25,4 +25,13 @@ config DRM_INGENIC_IPU >>> The Image Processing Unit (IPU) will appear as a second primary >>> plane. >>> +config DRM_INGENIC_DW_HDMI >>> + tristate "Ingenic specific support for Synopsys DW HDMI" >>> + depends on MACH_JZ4780 >>> + select DRM_DW_HDMI >>> + help >>> + Choose this option to enable Synopsys DesignWare HDMI based >>> driver. >>> + If you want to enable HDMI on Ingenic JZ4780 based SoC, you >>> should >>> + select this option.. >>> + >>> endif >>> diff --git a/drivers/gpu/drm/ingenic/Makefile >>> b/drivers/gpu/drm/ingenic/Makefile >>> index d313326bdddbb..f10cc1c5a5f22 100644 >>> --- a/drivers/gpu/drm/ingenic/Makefile >>> +++ b/drivers/gpu/drm/ingenic/Makefile >>> @@ -1,3 +1,4 @@ >>> obj-$(CONFIG_DRM_INGENIC) += ingenic-drm.o >>> ingenic-drm-y = ingenic-drm-drv.o >>> ingenic-drm-$(CONFIG_DRM_INGENIC_IPU) += ingenic-ipu.o >>> +obj-$(CONFIG_DRM_INGENIC_DW_HDMI) += ingenic-dw-hdmi.o >>> diff --git a/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c >>> b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c >>> new file mode 100644 >>> index 0000000000000..c14890d6b9826 >>> --- /dev/null >>> +++ b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c >>> @@ -0,0 +1,129 @@ >>> +// SPDX-License-Identifier: GPL-2.0 >>> +/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. >>> + * Copyright (C) 2019, 2020 Paul Boddie <paul@boddie.org.uk> >>> + * >>> + * Derived from dw_hdmi-imx.c with i.MX portions removed. >>> + * Probe and remove operations derived from rcar_dw_hdmi.c. >>> + */ >>> + >>> +#include <linux/module.h> >>> +#include <linux/platform_device.h> >>> +#include <linux/regmap.h> >>> + >>> +#include <drm/bridge/dw_hdmi.h> >>> +#include <drm/drm_of.h> >>> +#include <drm/drm_print.h> >>> + >>> +static const struct dw_hdmi_mpll_config ingenic_mpll_cfg[] = { >>> + { 45250000, { { 0x01e0, 0x0000 }, { 0x21e1, 0x0000 }, { 0x41e2, >>> 0x0000 } } }, >>> + { 92500000, { { 0x0140, 0x0005 }, { 0x2141, 0x0005 }, { 0x4142, >>> 0x0005 } } }, >>> + { 148500000, { { 0x00a0, 0x000a }, { 0x20a1, 0x000a }, { 0x40a2, >>> 0x000a } } }, >>> + { 216000000, { { 0x00a0, 0x000a }, { 0x2001, 0x000f }, { 0x4002, >>> 0x000f } } }, >>> + { ~0UL, { { 0x0000, 0x0000 }, { 0x0000, 0x0000 }, { 0x0000, >>> 0x0000 } } } >>> +}; >>> + >>> +static const struct dw_hdmi_curr_ctrl ingenic_cur_ctr[] = { >>> + /*pixelclk bpp8 bpp10 bpp12 */ >>> + { 54000000, { 0x091c, 0x091c, 0x06dc } }, >>> + { 58400000, { 0x091c, 0x06dc, 0x06dc } }, >>> + { 72000000, { 0x06dc, 0x06dc, 0x091c } }, >>> + { 74250000, { 0x06dc, 0x0b5c, 0x091c } }, >>> + { 118800000, { 0x091c, 0x091c, 0x06dc } }, >>> + { 216000000, { 0x06dc, 0x0b5c, 0x091c } }, >>> + { ~0UL, { 0x0000, 0x0000, 0x0000 } }, >>> +}; >>> + >>> +/* >>> + * Resistance term 133Ohm Cfg >>> + * PREEMP config 0.00 >>> + * TX/CK level 10 >>> + */ >>> +static const struct dw_hdmi_phy_config ingenic_phy_config[] = { >>> + /*pixelclk symbol term vlev */ >>> + { 216000000, 0x800d, 0x0005, 0x01ad}, >>> + { ~0UL, 0x0000, 0x0000, 0x0000} >>> +}; >>> + >>> +static enum drm_mode_status >>> +ingenic_dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data, >>> + const struct drm_display_info *info, >>> + const struct drm_display_mode *mode) >>> +{ >>> + if (mode->clock < 13500) >>> + return MODE_CLOCK_LOW; >>> + /* FIXME: Hardware is capable of 270MHz, but setup data is >>> missing. */ >>> + if (mode->clock > 216000) >>> + return MODE_CLOCK_HIGH; >>> + >>> + return MODE_OK; >>> +} >>> + >>> +static struct dw_hdmi_plat_data ingenic_dw_hdmi_plat_data = { >>> + .mpll_cfg = ingenic_mpll_cfg, >>> + .cur_ctr = ingenic_cur_ctr, >>> + .phy_config = ingenic_phy_config, >>> + .mode_valid = ingenic_dw_hdmi_mode_valid, >>> + .output_port = 1, >>> +}; >>> + >>> +static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = { >>> + { .compatible = "ingenic,jz4780-dw-hdmi" }, >>> + { /* Sentinel */ }, >>> +}; >>> +MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids); >>> + >>> +static int ingenic_dw_hdmi_probe(struct platform_device *pdev) >>> +{ >>> + struct dw_hdmi *hdmi; >>> + struct regulator *regulator; >>> + int ret; >>> + >>> + hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data); >>> + if (IS_ERR(hdmi)) >>> + return PTR_ERR(hdmi); >>> + >>> + platform_set_drvdata(pdev, hdmi); >>> + >>> + regulator = devm_regulator_get_optional(&pdev->dev, "hdmi-5v"); >>> + >> >> Nit - you can remove this blank line. > > ok. > >> >>> + if (IS_ERR(regulator)) { >>> + ret = PTR_ERR(regulator); >>> + >>> + DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %s >>> (%d)\n", >>> + "hdmi-5v", ret); >>> + return ret; >>> + } >>> + >>> + ret = regulator_enable(regulator); >> >> You used devm_regulator_get_optional(), so you are not guaranteed >> to obtain anything; your "regulator" variable might be a NULL >> pointer, so you can't just call regulator_enable() without checking >> it first. > > right. I forgot about that. > >> >>> + if (ret) { >>> + DRM_DEV_ERROR(&pdev->dev, "Failed to enable hpd regulator: >>> %d\n", >>> + ret); >>> + return ret; >>> + } >>> + >>> + return 0; >>> +} >>> + >>> +static int ingenic_dw_hdmi_remove(struct platform_device *pdev) >>> +{ >>> + struct dw_hdmi *hdmi = platform_get_drvdata(pdev); >>> + >>> + dw_hdmi_remove(hdmi); >> >> You probably should disable the regulator (if not NULL) here. > > Indeed. Would it be ok to make struct regulator *regulator static > or do we need dynamically allocated memory? static non-const is almost always a bad idea, so avoid it. You can either: - create a "ingenic_dw_hdmi" struct that will contain a pointer to dw_hdmi and a pointer to the regulator. Instanciate it in the probe with devm_kzalloc() and set the pointers, then set it as the driver data (platform_set_drvdata). In the remove function you can then obtain the pointer to your ingenic_dw_hdmi struct with platform_get_drvdata(), and you can remove the dw_hdmi and unregister the regulator. - register cleanup functions, using devm_add_action_or_reset(dev, f, priv). When it's time to cleanup, the kernel core will call f(priv) automatically. So you can add a small wrapper around dw_hdmi_remove() and another one around regulator_disable(), and those will be called automatically if your probe function fails, or when the driver is removed. Then you can completely remove the ".remove" callback. There are a few examples of these in the ingenic-drm-drv.c if you want to take a look. Cheers, -Paul >> >>> + >>> + return 0; >>> +} >>> + >>> +static struct platform_driver ingenic_dw_hdmi_driver = { >>> + .probe = ingenic_dw_hdmi_probe, >>> + .remove = ingenic_dw_hdmi_remove, >>> + .driver = { >>> + .name = "dw-hdmi-ingenic", >>> + .of_match_table = ingenic_dw_hdmi_dt_ids, >>> + }, >>> +}; >>> + >> >> Nit - remove this blank line too. > > ok. > >> >> Cheers, >> -Paul >> >>> +module_platform_driver(ingenic_dw_hdmi_driver); >>> + >>> +MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension"); >>> +MODULE_LICENSE("GPL v2"); >>> +MODULE_ALIAS("platform:dwhdmi-ingenic"); >>> -- >>> 2.33.0 >> >> >
Hi Paul, >>> You probably should disable the regulator (if not NULL) here. >> Indeed. Would it be ok to make struct regulator *regulator static >> or do we need dynamically allocated memory? > > static non-const is almost always a bad idea, so avoid it. Well some years ago it was a perfectly simple solution that still works... But I asked because I had a lot of doubt. > > You can either: > > - create a "ingenic_dw_hdmi" struct that will contain a pointer to dw_hdmi and a pointer to the regulator. Instanciate it in the probe with devm_kzalloc() and set the pointers, then set it as the driver data (platform_set_drvdata). In the remove function you can then obtain the pointer to your ingenic_dw_hdmi struct with platform_get_drvdata(), and you can remove the dw_hdmi and unregister the regulator. > > - register cleanup functions, using devm_add_action_or_reset(dev, f, priv). When it's time to cleanup, the kernel core will call f(priv) automatically. So you can add a small wrapper around dw_hdmi_remove() and another one around regulator_disable(), and those will be called automatically if your probe function fails, or when the driver is removed. Then you can completely remove the ".remove" callback. There are a few examples of these in the ingenic-drm-drv.c if you want to take a look. The second one turned out to be cleaner to handle special cases like if there is no regulator. We just register the disabler only if there is a regulator and enable succeeds. So v9 is coming now. BR and thanks, Nikolaus
diff --git a/drivers/gpu/drm/ingenic/Kconfig b/drivers/gpu/drm/ingenic/Kconfig index 3b57f8be007c4..4efc709d77b0a 100644 --- a/drivers/gpu/drm/ingenic/Kconfig +++ b/drivers/gpu/drm/ingenic/Kconfig @@ -25,4 +25,13 @@ config DRM_INGENIC_IPU The Image Processing Unit (IPU) will appear as a second primary plane. +config DRM_INGENIC_DW_HDMI + tristate "Ingenic specific support for Synopsys DW HDMI" + depends on MACH_JZ4780 + select DRM_DW_HDMI + help + Choose this option to enable Synopsys DesignWare HDMI based driver. + If you want to enable HDMI on Ingenic JZ4780 based SoC, you should + select this option.. + endif diff --git a/drivers/gpu/drm/ingenic/Makefile b/drivers/gpu/drm/ingenic/Makefile index d313326bdddbb..f10cc1c5a5f22 100644 --- a/drivers/gpu/drm/ingenic/Makefile +++ b/drivers/gpu/drm/ingenic/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_DRM_INGENIC) += ingenic-drm.o ingenic-drm-y = ingenic-drm-drv.o ingenic-drm-$(CONFIG_DRM_INGENIC_IPU) += ingenic-ipu.o +obj-$(CONFIG_DRM_INGENIC_DW_HDMI) += ingenic-dw-hdmi.o diff --git a/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c new file mode 100644 index 0000000000000..c14890d6b9826 --- /dev/null +++ b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. + * Copyright (C) 2019, 2020 Paul Boddie <paul@boddie.org.uk> + * + * Derived from dw_hdmi-imx.c with i.MX portions removed. + * Probe and remove operations derived from rcar_dw_hdmi.c. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#include <drm/bridge/dw_hdmi.h> +#include <drm/drm_of.h> +#include <drm/drm_print.h> + +static const struct dw_hdmi_mpll_config ingenic_mpll_cfg[] = { + { 45250000, { { 0x01e0, 0x0000 }, { 0x21e1, 0x0000 }, { 0x41e2, 0x0000 } } }, + { 92500000, { { 0x0140, 0x0005 }, { 0x2141, 0x0005 }, { 0x4142, 0x0005 } } }, + { 148500000, { { 0x00a0, 0x000a }, { 0x20a1, 0x000a }, { 0x40a2, 0x000a } } }, + { 216000000, { { 0x00a0, 0x000a }, { 0x2001, 0x000f }, { 0x4002, 0x000f } } }, + { ~0UL, { { 0x0000, 0x0000 }, { 0x0000, 0x0000 }, { 0x0000, 0x0000 } } } +}; + +static const struct dw_hdmi_curr_ctrl ingenic_cur_ctr[] = { + /*pixelclk bpp8 bpp10 bpp12 */ + { 54000000, { 0x091c, 0x091c, 0x06dc } }, + { 58400000, { 0x091c, 0x06dc, 0x06dc } }, + { 72000000, { 0x06dc, 0x06dc, 0x091c } }, + { 74250000, { 0x06dc, 0x0b5c, 0x091c } }, + { 118800000, { 0x091c, 0x091c, 0x06dc } }, + { 216000000, { 0x06dc, 0x0b5c, 0x091c } }, + { ~0UL, { 0x0000, 0x0000, 0x0000 } }, +}; + +/* + * Resistance term 133Ohm Cfg + * PREEMP config 0.00 + * TX/CK level 10 + */ +static const struct dw_hdmi_phy_config ingenic_phy_config[] = { + /*pixelclk symbol term vlev */ + { 216000000, 0x800d, 0x0005, 0x01ad}, + { ~0UL, 0x0000, 0x0000, 0x0000} +}; + +static enum drm_mode_status +ingenic_dw_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data, + const struct drm_display_info *info, + const struct drm_display_mode *mode) +{ + if (mode->clock < 13500) + return MODE_CLOCK_LOW; + /* FIXME: Hardware is capable of 270MHz, but setup data is missing. */ + if (mode->clock > 216000) + return MODE_CLOCK_HIGH; + + return MODE_OK; +} + +static struct dw_hdmi_plat_data ingenic_dw_hdmi_plat_data = { + .mpll_cfg = ingenic_mpll_cfg, + .cur_ctr = ingenic_cur_ctr, + .phy_config = ingenic_phy_config, + .mode_valid = ingenic_dw_hdmi_mode_valid, + .output_port = 1, +}; + +static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = { + { .compatible = "ingenic,jz4780-dw-hdmi" }, + { /* Sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids); + +static int ingenic_dw_hdmi_probe(struct platform_device *pdev) +{ + struct dw_hdmi *hdmi; + struct regulator *regulator; + int ret; + + hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data); + if (IS_ERR(hdmi)) + return PTR_ERR(hdmi); + + platform_set_drvdata(pdev, hdmi); + + regulator = devm_regulator_get_optional(&pdev->dev, "hdmi-5v"); + + if (IS_ERR(regulator)) { + ret = PTR_ERR(regulator); + + DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %s (%d)\n", + "hdmi-5v", ret); + return ret; + } + + ret = regulator_enable(regulator); + if (ret) { + DRM_DEV_ERROR(&pdev->dev, "Failed to enable hpd regulator: %d\n", + ret); + return ret; + } + + return 0; +} + +static int ingenic_dw_hdmi_remove(struct platform_device *pdev) +{ + struct dw_hdmi *hdmi = platform_get_drvdata(pdev); + + dw_hdmi_remove(hdmi); + + return 0; +} + +static struct platform_driver ingenic_dw_hdmi_driver = { + .probe = ingenic_dw_hdmi_probe, + .remove = ingenic_dw_hdmi_remove, + .driver = { + .name = "dw-hdmi-ingenic", + .of_match_table = ingenic_dw_hdmi_dt_ids, + }, +}; + +module_platform_driver(ingenic_dw_hdmi_driver); + +MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:dwhdmi-ingenic");