This adds basic i.MX8MM glue code for the Samsung DSIM PHY. There are still a couple of items which need to be sorted out in drivers/gpu/drm/bridge/samsung-dsim.c before this can even be merged, specifically:
- The dsi->out_bridge is not populated until samsung_dsim_host_attach() is called, however samsung_dsim_host_attach() is not called until the next bridge attaches and calls mipi_dsi_attach(), and that only happens after the DSIM calls drm_bridge_attach() on that next bridge.
- The samsung_dsim_bridge_mode_fixup() is needed for iMX8MM LCDIF to set the correct sync flags. This likely needs to be done in the glue code.
Signed-off-by: Marek Vasut marex@denx.de Cc: Fabio Estevam festevam@gmail.com Cc: Guido Günther agx@sigxcpu.org Cc: Jaehoon Chung jh80.chung@samsung.com Cc: Lucas Stach l.stach@pengutronix.de Cc: Marek Szyprowski m.szyprowski@samsung.com Cc: Michael Tretter m.tretter@pengutronix.de Cc: NXP Linux Team linux-imx@nxp.com Cc: Shawn Guo shawnguo@kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org To: dri-devel@lists.freedesktop.org -- NOTE: This depends on https://patchwork.kernel.org/project/dri-devel/list/?series=347439 --- drivers/gpu/drm/bridge/Kconfig | 6 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/samsung-dsim-imx.c | 161 ++++++++++++++++++++++ drivers/gpu/drm/bridge/samsung-dsim.c | 25 +++- 4 files changed, 192 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/bridge/samsung-dsim-imx.c
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 2d4459f78cdc..f97a8ebfcef1 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -129,6 +129,12 @@ config DRM_SAMSUNG_DSIM help Samsung MIPI DSI bridge driver.
+config DRM_SAMSUNG_DSIM_IMX + tristate "Samsung MIPI DSI bridge extras for NXP i.MX" + depends on DRM_SAMSUNG_DSIM + help + Samsung MIPI DSI bridge driver extras for NXP i.MX. + config DRM_SIL_SII8620 tristate "Silicon Image SII8620 HDMI/MHL bridge" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index f7972d703c5d..61188a0cd052 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o obj-$(CONFIG_DRM_SAMSUNG_DSIM) += samsung-dsim.o +obj-$(CONFIG_DRM_SAMSUNG_DSIM_IMX) += samsung-dsim-imx.o obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o obj-$(CONFIG_DRM_SII902X) += sii902x.o obj-$(CONFIG_DRM_SII9234) += sii9234.o diff --git a/drivers/gpu/drm/bridge/samsung-dsim-imx.c b/drivers/gpu/drm/bridge/samsung-dsim-imx.c new file mode 100644 index 000000000000..6c7307ce7eaf --- /dev/null +++ b/drivers/gpu/drm/bridge/samsung-dsim-imx.c @@ -0,0 +1,161 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * NXP i.MX8M SoC MIPI DSI driver + * + * Copyright (C) 2020 Marek Vasut marex@denx.de + */ + +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of_graph.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> + +#include <drm/bridge/samsung-dsim.h> +#include <drm/drm_bridge.h> +#include <drm/drm_encoder.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_probe_helper.h> +#include <drm/drm_simple_kms_helper.h> + +enum { + DSI_PORT_IN, + DSI_PORT_OUT +}; + +struct imx_dsim_priv { + struct samsung_dsim *dsi; + struct drm_encoder encoder; +}; + +static const unsigned int imx8mm_dsim_reg_values[] = { + [RESET_TYPE] = DSIM_SWRST, + [PLL_TIMER] = 500, + [STOP_STATE_CNT] = 0xf, + [PHYCTRL_ULPS_EXIT] = 0xaf, + [PHYCTRL_VREG_LP] = 0, + [PHYCTRL_SLEW_UP] = 0, + [PHYTIMING_LPX] = 0x06, + [PHYTIMING_HS_EXIT] = 0x0b, + [PHYTIMING_CLK_PREPARE] = 0x07, + [PHYTIMING_CLK_ZERO] = 0x26, + [PHYTIMING_CLK_POST] = 0x0d, + [PHYTIMING_CLK_TRAIL] = 0x08, + [PHYTIMING_HS_PREPARE] = 0x08, + [PHYTIMING_HS_ZERO] = 0x0d, + [PHYTIMING_HS_TRAIL] = 0x0b, +}; + +static int imx_dsim_host_attach(struct device *dev, + struct mipi_dsi_device *device) +{ + struct imx_dsim_priv *dsi = dev_get_drvdata(dev); + struct drm_device *drm = dsi->encoder.dev; + + if (drm->mode_config.poll_enabled) + drm_kms_helper_hotplug_event(drm); + + return 0; +} + +static int imx_dsim_host_detach(struct device *dev, + struct mipi_dsi_device *device) +{ + struct imx_dsim_priv *dsi = dev_get_drvdata(dev); + struct drm_device *drm = dsi->encoder.dev; + + if (drm->mode_config.poll_enabled) + drm_kms_helper_hotplug_event(drm); + + return 0; +} + +static const struct samsung_dsim_host_ops imx_dsim_host_ops = { + .attach = imx_dsim_host_attach, + .detach = imx_dsim_host_detach, +}; + +static const struct samsung_dsim_driver_data imx8mm_dsi_driver_data = { + .reg_ofs = EXYNOS5433_REG_OFS, + .plltmr_reg = 0xa0, + .has_clklane_stop = 1, + .num_clks = 2, + .max_freq = 2100, + .wait_for_reset = 0, + .num_bits_resol = 12, + .reg_values = imx8mm_dsim_reg_values, + .host_ops = &imx_dsim_host_ops, +}; + +static const struct of_device_id imx_dsim_of_match[] = { + { .compatible = "fsl,imx8mm-mipi-dsim", + .data = &imx8mm_dsi_driver_data }, + { } +}; + +static int imx_dsim_probe(struct platform_device *pdev) +{ + struct imx_dsim_priv *dsi; + struct device *dev = &pdev->dev; + + dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); + if (!dsi) + return -ENOMEM; + platform_set_drvdata(pdev, dsi); + + dsi->dsi = samsung_dsim_probe(pdev); + if (IS_ERR(dsi->dsi)) + return PTR_ERR(dsi->dsi); + + pm_runtime_enable(dev); + + return 0; +} + +static int imx_dsim_remove(struct platform_device *pdev) +{ + struct imx_dsim_priv *dsi = platform_get_drvdata(pdev); + + pm_runtime_disable(&pdev->dev); + + samsung_dsim_remove(dsi->dsi); + + return 0; +} + +static int __maybe_unused imx_dsim_suspend(struct device *dev) +{ + struct imx_dsim_priv *dsi = dev_get_drvdata(dev); + + return samsung_dsim_suspend(dsi->dsi); +} + +static int __maybe_unused imx_dsim_resume(struct device *dev) +{ + struct imx_dsim_priv *dsi = dev_get_drvdata(dev); + + return samsung_dsim_resume(dsi->dsi); +} + +static const struct dev_pm_ops imx_dsim_pm_ops = { + SET_RUNTIME_PM_OPS(imx_dsim_suspend, imx_dsim_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + +static struct platform_driver imx_dsim_driver = { + .probe = imx_dsim_probe, + .remove = imx_dsim_remove, + .driver = { + .name = "imx-dsim-dsi", + .owner = THIS_MODULE, + .pm = &imx_dsim_pm_ops, + .of_match_table = imx_dsim_of_match, + }, +}; + +module_platform_driver(imx_dsim_driver); + +MODULE_AUTHOR("Marek Vasut marex@denx.de"); +MODULE_DESCRIPTION("NXP i.MX8M SoC MIPI DSI"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index 42b49546dd00..12aeceb40450 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -28,6 +28,7 @@ #include <drm/drm_bridge.h> #include <drm/drm_fb_helper.h> #include <drm/drm_mipi_dsi.h> +#include <drm/drm_of.h> #include <drm/drm_panel.h> #include <drm/drm_print.h> #include <drm/drm_probe_helper.h> @@ -1388,8 +1389,15 @@ static int samsung_dsim_bridge_attach(struct drm_bridge *bridge, { struct samsung_dsim *dsi = bridge->driver_private; struct drm_encoder *encoder = bridge->encoder; + struct device *dev = dsi->dev; + struct device_node *np = dev->of_node; int ret;
+ ret = drm_of_find_panel_or_bridge(np, 1, 0, + &dsi->panel, &dsi->out_bridge); + if (ret) + return ret; + if (!dsi->out_bridge && !dsi->panel) return -EPROBE_DEFER;
@@ -1398,7 +1406,6 @@ static int samsung_dsim_bridge_attach(struct drm_bridge *bridge, bridge, flags); if (ret) return ret; - list_splice_init(&encoder->bridge_chain, &dsi->bridge_chain); } else { ret = samsung_dsim_create_connector(dsi); if (ret) @@ -1456,18 +1463,31 @@ static void samsung_dsim_bridge_mode_set(struct drm_bridge *bridge, drm_mode_copy(&dsi->mode, adjusted_mode); }
+static bool samsung_dsim_bridge_mode_fixup(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + /* At least LCDIF + DSIM needs active low sync */ + adjusted_mode->flags |= (DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC); + adjusted_mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC); + + return true; +} + static const struct drm_bridge_funcs samsung_dsim_bridge_funcs = { .attach = samsung_dsim_bridge_attach, .detach = samsung_dsim_bridge_detach, .enable = samsung_dsim_bridge_enable, .disable = samsung_dsim_bridge_disable, .mode_set = samsung_dsim_bridge_mode_set, + .mode_fixup = samsung_dsim_bridge_mode_fixup, };
static int samsung_dsim_host_attach(struct mipi_dsi_host *host, struct mipi_dsi_device *device) { struct samsung_dsim *dsi = host_to_dsi(host); +#if 0 const struct samsung_dsim_host_ops *ops = dsi->driver_data->host_ops; struct drm_bridge *out_bridge;
@@ -1493,13 +1513,16 @@ static int samsung_dsim_host_attach(struct mipi_dsi_host *host, if (ret) return ret; } +#endif
dsi->lanes = device->lanes; dsi->format = device->format; dsi->mode_flags = device->mode_flags;
+#if 0 if (ops && ops->attach) ops->attach(dsi->dsi_host.dev, device); +#endif
return 0; }