diff options
Diffstat (limited to 'drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c')
-rw-r--r-- | drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c new file mode 100644 index 000000000000..f4927a6ce26d --- /dev/null +++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DSI interface to the Samsung S6E63M0 panel. + * (C) 2019 Linus Walleij + */ + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/of_device.h> + +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_print.h> + +#include "panel-samsung-s6e63m0.h" + +#define MCS_GLOBAL_PARAM 0xb0 +#define S6E63M0_DSI_MAX_CHUNK 15 /* CMD + 15 bytes max */ + +static int s6e63m0_dsi_dcs_write(struct device *dev, const u8 *data, size_t len) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); + const u8 *seqp = data; + u8 cmd; + u8 cmdwritten; + int remain; + int chunk; + int ret; + + DRM_DEV_INFO(dev, "DSI writing dcs seq: %*ph\n", (int)len, data); + + /* Pick out and skip past the DCS command */ + cmd = *seqp; + seqp++; + cmdwritten = 0; + remain = len - 1; + chunk = remain; + + /* Send max S6E63M0_DSI_MAX_CHUNK bytes at a time */ + if (chunk > S6E63M0_DSI_MAX_CHUNK) + chunk = S6E63M0_DSI_MAX_CHUNK; + ret = mipi_dsi_dcs_write(dsi, cmd, seqp, chunk); + if (ret < 0) { + DRM_DEV_ERROR(dev, + "error sending DCS command seq cmd %02x\n", + cmd); + return ret; + } + cmdwritten += chunk; + seqp += chunk; + + while (cmdwritten < remain) { + chunk = remain - cmdwritten; + if (chunk > S6E63M0_DSI_MAX_CHUNK) + chunk = S6E63M0_DSI_MAX_CHUNK; + ret = mipi_dsi_dcs_write(dsi, MCS_GLOBAL_PARAM, &cmdwritten, 1); + if (ret < 0) { + DRM_DEV_ERROR(dev, + "error sending CMD %02x global param %02x\n", + cmd, cmdwritten); + return ret; + } + ret = mipi_dsi_dcs_write(dsi, cmd, seqp, chunk); + if (ret < 0) { + DRM_DEV_ERROR(dev, + "error sending CMD %02x chunk\n", + cmd); + return ret; + } + cmdwritten += chunk; + seqp += chunk; + } + DRM_DEV_INFO(dev, "sent command %02x %02x bytes\n", + cmd, cmdwritten); + + usleep_range(8000, 9000); + + return 0; +} + +static int s6e63m0_dsi_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + int ret; + + dsi->lanes = 2; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->hs_rate = 349440000; + dsi->lp_rate = 9600000; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | + MIPI_DSI_MODE_EOT_PACKET | + MIPI_DSI_MODE_VIDEO_BURST; + + ret = s6e63m0_probe(dev, s6e63m0_dsi_dcs_write, true); + if (ret) + return ret; + + ret = mipi_dsi_attach(dsi); + if (ret < 0) + s6e63m0_remove(dev); + + return ret; +} + +static int s6e63m0_dsi_remove(struct mipi_dsi_device *dsi) +{ + mipi_dsi_detach(dsi); + return s6e63m0_remove(&dsi->dev); +} + +static const struct of_device_id s6e63m0_dsi_of_match[] = { + { .compatible = "samsung,s6e63m0" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, s6e63m0_dsi_of_match); + +static struct mipi_dsi_driver s6e63m0_dsi_driver = { + .probe = s6e63m0_dsi_probe, + .remove = s6e63m0_dsi_remove, + .driver = { + .name = "panel-samsung-s6e63m0", + .of_match_table = s6e63m0_dsi_of_match, + }, +}; +module_mipi_dsi_driver(s6e63m0_dsi_driver); + +MODULE_AUTHOR("Linus Walleij <linusw@kernel.org>"); +MODULE_DESCRIPTION("s6e63m0 LCD DSI Driver"); +MODULE_LICENSE("GPL v2"); |