| Message ID | 20221015220753.108641-1-marex@denx.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: bridge: samsung-dsim: Add i.MX8M Plus support | expand |
Hi Marek On Sun, 2022-10-16 at 00:07 +0200, Marek Vasut wrote: > Add extras to support i.MX8M Plus. The main change is the removal of > HS/VS/DE signal inversion in the LCDIFv3-DSIM glue logic, otherwise > the implementation of this IP in i.MX8M Plus is very much compatible > with the i.MX8M Mini/Nano one. > > Signed-off-by: Marek Vasut <marex@denx.de> Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> I also tried to test it on Verdin iMX8M Plus but so far I was unable to make it work. Either I am still missing some other pieces or I got the imx8mp.dtsi parts wrong. Do you have them available somewhere by any chance? Thanks! Cheers Marcel > --- > Cc: Adam Ford <aford173@gmail.com> > Cc: Andrzej Hajda <andrzej.hajda@intel.com> > Cc: Frieder Schrempf <frieder.schrempf@kontron.de> > Cc: Inki Dae <inki.dae@samsung.com> > Cc: Jagan Teki <jagan@amarulasolutions.com> > Cc: Kyungmin Park <kyungmin.park@samsung.com> > Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com> > Cc: Marek Szyprowski <m.szyprowski@samsung.com> > Cc: Matteo Lisi <matteo.lisi@engicam.com> > Cc: Michael Nazzareno Trimarchi <michael@amarulasolutions.com> > Cc: NXP Linux Team <linux-imx@nxp.com> > Cc: Robert Foss <robert.foss@linaro.org> > Cc: Seung-Woo Kim <sw0312.kim@samsung.com> > Cc: Tim Harvey <tharvey@gateworks.com> > Cc: Tommaso Merciai <tommaso.merciai@amarulasolutions.com> > Cc: linux-amarula <linux-amarula@amarulasolutions.com> > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-samsung-soc@vger.kernel.org > To: dri-devel@lists.freedesktop.org > --- > drivers/gpu/drm/bridge/samsung-dsim.c | 55 +++++++++++++++++++++------ > include/drm/bridge/samsung-dsim.h | 1 + > 2 files changed, 44 insertions(+), 12 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c > index 012d8b6463ad6..cf40fd8813ff2 100644 > --- a/drivers/gpu/drm/bridge/samsung-dsim.c > +++ b/drivers/gpu/drm/bridge/samsung-dsim.c > @@ -465,6 +465,7 @@ samsung_dsim_types[SAMSUNG_DSIM_TYPE_COUNT] = { > [SAMSUNG_DSIM_TYPE_EXYNOS5422] = &exynos5422_dsi_driver_data, > [SAMSUNG_DSIM_TYPE_EXYNOS5433] = &exynos5433_dsi_driver_data, > [SAMSUNG_DSIM_TYPE_IMX8MM] = &imx8mm_dsi_driver_data, > + [SAMSUNG_DSIM_TYPE_IMX8MP] = &imx8mm_dsi_driver_data, > }; > > static inline struct samsung_dsim *host_to_dsi(struct mipi_dsi_host *h) > @@ -1404,18 +1405,26 @@ static int samsung_dsim_atomic_check(struct drm_bridge *bridge, > struct samsung_dsim *dsi = bridge_to_dsi(bridge); > struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; > > + /* > + * The i.MX8M Mini/Nano glue logic between LCDIF and DSIM > + * inverts HS/VS/DE sync signals polarity, therefore, while > + * i.MX 8M Mini Applications Processor Reference Manual Rev. 3, 11/2020 > + * 13.6.3.5.2 RGB interface > + * i.MX 8M Nano Applications Processor Reference Manual Rev. 2, 07/2022 > + * 13.6.2.7.2 RGB interface > + * both claim "Vsync, Hsync, and VDEN are active high signals.", the > + * LCDIF must generate inverted HS/VS/DE signals, i.e. active LOW. > + * > + * The i.MX8M Plus glue logic between LCDIFv3 and DSIM does not > + * implement the same behavior, therefore LCDIFv3 must generate > + * HS/VS/DE signals active HIGH. > + */ > if (dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MM) { > - /** > - * FIXME: > - * At least LCDIF + DSIM needs active low sync, > - * but i.MX 8M Mini Applications Processor Reference Manual, > - * Rev. 3, 11/2020 says > - * > - * 13.6.3.5.2 RGB interface > - * Vsync, Hsync, and VDEN are active high signals. > - */ > adjusted_mode->flags |= (DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC); > adjusted_mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC); > + } else if (dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MP) { > + adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC); > + adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC); > } > > return 0; > @@ -1448,7 +1457,8 @@ static int samsung_dsim_attach(struct drm_bridge *bridge, > * Passing NULL to the previous bridge makes Exynos DSI drivers > * work which is exactly done before. > */ > - if (!(dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MM)) > + if (dsi->plat_data->hw_type != SAMSUNG_DSIM_TYPE_IMX8MM && > + dsi->plat_data->hw_type != SAMSUNG_DSIM_TYPE_IMX8MP) > previous = NULL; > > return drm_bridge_attach(bridge->encoder, dsi->out_bridge, previous, > @@ -1649,7 +1659,11 @@ static const struct samsung_dsim_host_ops samsung_dsim_generic_host_ops = { > .unregister_host = samsung_dsim_unregister_host, > }; > > -static const struct drm_bridge_timings samsung_dsim_bridge_timings = { > +static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_high = { > + .input_bus_flags = DRM_BUS_FLAG_DE_HIGH, > +}; > + > +static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_low = { > .input_bus_flags = DRM_BUS_FLAG_DE_LOW, > }; > > @@ -1733,9 +1747,17 @@ int samsung_dsim_probe(struct platform_device *pdev) > > dsi->bridge.funcs = &samsung_dsim_bridge_funcs; > dsi->bridge.of_node = dev->of_node; > - dsi->bridge.timings = &samsung_dsim_bridge_timings; > dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; > > + /* > + * The i.MX8M Mini/Nano LCDIF-DSIM glue logic inverts DE signal > + * polarity, see comment in samsung_dsim_atomic_check(). > + */ > + if (dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MM) > + dsi->bridge.timings = &samsung_dsim_bridge_timings_de_low; > + else > + dsi->bridge.timings = &samsung_dsim_bridge_timings_de_high; > + > if (dsi->plat_data->host_ops && dsi->plat_data->host_ops->register_host) > ret = dsi->plat_data->host_ops->register_host(dsi); > > @@ -1841,11 +1863,20 @@ static const struct samsung_dsim_plat_data samsung_dsim_imx8mm_pdata = { > .host_ops = &samsung_dsim_generic_host_ops, > }; > > +static const struct samsung_dsim_plat_data samsung_dsim_imx8mp_pdata = { > + .hw_type = SAMSUNG_DSIM_TYPE_IMX8MP, > + .host_ops = &samsung_dsim_generic_host_ops, > +}; > + > static const struct of_device_id samsung_dsim_of_match[] = { > { > .compatible = "fsl,imx8mm-mipi-dsim", > .data = &samsung_dsim_imx8mm_pdata, > }, > + { > + .compatible = "fsl,imx8mp-mipi-dsim", > + .data = &samsung_dsim_imx8mp_pdata, > + }, > { /* sentinel. */ } > }; > MODULE_DEVICE_TABLE(of, samsung_dsim_of_match); > diff --git a/include/drm/bridge/samsung-dsim.h b/include/drm/bridge/samsung-dsim.h > index df3d030daec6a..3789f9dbb238b 100644 > --- a/include/drm/bridge/samsung-dsim.h > +++ b/include/drm/bridge/samsung-dsim.h > @@ -28,6 +28,7 @@ enum samsung_dsim_type { > SAMSUNG_DSIM_TYPE_EXYNOS5422, > SAMSUNG_DSIM_TYPE_EXYNOS5433, > SAMSUNG_DSIM_TYPE_IMX8MM, > + SAMSUNG_DSIM_TYPE_IMX8MP, > SAMSUNG_DSIM_TYPE_COUNT, > };
diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index 012d8b6463ad6..cf40fd8813ff2 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -465,6 +465,7 @@ samsung_dsim_types[SAMSUNG_DSIM_TYPE_COUNT] = { [SAMSUNG_DSIM_TYPE_EXYNOS5422] = &exynos5422_dsi_driver_data, [SAMSUNG_DSIM_TYPE_EXYNOS5433] = &exynos5433_dsi_driver_data, [SAMSUNG_DSIM_TYPE_IMX8MM] = &imx8mm_dsi_driver_data, + [SAMSUNG_DSIM_TYPE_IMX8MP] = &imx8mm_dsi_driver_data, }; static inline struct samsung_dsim *host_to_dsi(struct mipi_dsi_host *h) @@ -1404,18 +1405,26 @@ static int samsung_dsim_atomic_check(struct drm_bridge *bridge, struct samsung_dsim *dsi = bridge_to_dsi(bridge); struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; + /* + * The i.MX8M Mini/Nano glue logic between LCDIF and DSIM + * inverts HS/VS/DE sync signals polarity, therefore, while + * i.MX 8M Mini Applications Processor Reference Manual Rev. 3, 11/2020 + * 13.6.3.5.2 RGB interface + * i.MX 8M Nano Applications Processor Reference Manual Rev. 2, 07/2022 + * 13.6.2.7.2 RGB interface + * both claim "Vsync, Hsync, and VDEN are active high signals.", the + * LCDIF must generate inverted HS/VS/DE signals, i.e. active LOW. + * + * The i.MX8M Plus glue logic between LCDIFv3 and DSIM does not + * implement the same behavior, therefore LCDIFv3 must generate + * HS/VS/DE signals active HIGH. + */ if (dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MM) { - /** - * FIXME: - * At least LCDIF + DSIM needs active low sync, - * but i.MX 8M Mini Applications Processor Reference Manual, - * Rev. 3, 11/2020 says - * - * 13.6.3.5.2 RGB interface - * Vsync, Hsync, and VDEN are active high signals. - */ adjusted_mode->flags |= (DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC); adjusted_mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC); + } else if (dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MP) { + adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC); + adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC); } return 0; @@ -1448,7 +1457,8 @@ static int samsung_dsim_attach(struct drm_bridge *bridge, * Passing NULL to the previous bridge makes Exynos DSI drivers * work which is exactly done before. */ - if (!(dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MM)) + if (dsi->plat_data->hw_type != SAMSUNG_DSIM_TYPE_IMX8MM && + dsi->plat_data->hw_type != SAMSUNG_DSIM_TYPE_IMX8MP) previous = NULL; return drm_bridge_attach(bridge->encoder, dsi->out_bridge, previous, @@ -1649,7 +1659,11 @@ static const struct samsung_dsim_host_ops samsung_dsim_generic_host_ops = { .unregister_host = samsung_dsim_unregister_host, }; -static const struct drm_bridge_timings samsung_dsim_bridge_timings = { +static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_high = { + .input_bus_flags = DRM_BUS_FLAG_DE_HIGH, +}; + +static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_low = { .input_bus_flags = DRM_BUS_FLAG_DE_LOW, }; @@ -1733,9 +1747,17 @@ int samsung_dsim_probe(struct platform_device *pdev) dsi->bridge.funcs = &samsung_dsim_bridge_funcs; dsi->bridge.of_node = dev->of_node; - dsi->bridge.timings = &samsung_dsim_bridge_timings; dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; + /* + * The i.MX8M Mini/Nano LCDIF-DSIM glue logic inverts DE signal + * polarity, see comment in samsung_dsim_atomic_check(). + */ + if (dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MM) + dsi->bridge.timings = &samsung_dsim_bridge_timings_de_low; + else + dsi->bridge.timings = &samsung_dsim_bridge_timings_de_high; + if (dsi->plat_data->host_ops && dsi->plat_data->host_ops->register_host) ret = dsi->plat_data->host_ops->register_host(dsi); @@ -1841,11 +1863,20 @@ static const struct samsung_dsim_plat_data samsung_dsim_imx8mm_pdata = { .host_ops = &samsung_dsim_generic_host_ops, }; +static const struct samsung_dsim_plat_data samsung_dsim_imx8mp_pdata = { + .hw_type = SAMSUNG_DSIM_TYPE_IMX8MP, + .host_ops = &samsung_dsim_generic_host_ops, +}; + static const struct of_device_id samsung_dsim_of_match[] = { { .compatible = "fsl,imx8mm-mipi-dsim", .data = &samsung_dsim_imx8mm_pdata, }, + { + .compatible = "fsl,imx8mp-mipi-dsim", + .data = &samsung_dsim_imx8mp_pdata, + }, { /* sentinel. */ } }; MODULE_DEVICE_TABLE(of, samsung_dsim_of_match); diff --git a/include/drm/bridge/samsung-dsim.h b/include/drm/bridge/samsung-dsim.h index df3d030daec6a..3789f9dbb238b 100644 --- a/include/drm/bridge/samsung-dsim.h +++ b/include/drm/bridge/samsung-dsim.h @@ -28,6 +28,7 @@ enum samsung_dsim_type { SAMSUNG_DSIM_TYPE_EXYNOS5422, SAMSUNG_DSIM_TYPE_EXYNOS5433, SAMSUNG_DSIM_TYPE_IMX8MM, + SAMSUNG_DSIM_TYPE_IMX8MP, SAMSUNG_DSIM_TYPE_COUNT, };
Add extras to support i.MX8M Plus. The main change is the removal of HS/VS/DE signal inversion in the LCDIFv3-DSIM glue logic, otherwise the implementation of this IP in i.MX8M Plus is very much compatible with the i.MX8M Mini/Nano one. Signed-off-by: Marek Vasut <marex@denx.de> --- Cc: Adam Ford <aford173@gmail.com> Cc: Andrzej Hajda <andrzej.hajda@intel.com> Cc: Frieder Schrempf <frieder.schrempf@kontron.de> Cc: Inki Dae <inki.dae@samsung.com> Cc: Jagan Teki <jagan@amarulasolutions.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Matteo Lisi <matteo.lisi@engicam.com> Cc: Michael Nazzareno Trimarchi <michael@amarulasolutions.com> Cc: NXP Linux Team <linux-imx@nxp.com> Cc: Robert Foss <robert.foss@linaro.org> Cc: Seung-Woo Kim <sw0312.kim@samsung.com> Cc: Tim Harvey <tharvey@gateworks.com> Cc: Tommaso Merciai <tommaso.merciai@amarulasolutions.com> Cc: linux-amarula <linux-amarula@amarulasolutions.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org To: dri-devel@lists.freedesktop.org --- drivers/gpu/drm/bridge/samsung-dsim.c | 55 +++++++++++++++++++++------ include/drm/bridge/samsung-dsim.h | 1 + 2 files changed, 44 insertions(+), 12 deletions(-)