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Reviewed-by: Douglas Anderson Signed-off-by: Tejas Vipin --- drivers/gpu/drm/drm_mipi_dsi.c | 31 +++++++++++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 2 ++ 2 files changed, 33 insertions(+) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index 8d0a866cf1e0..b7ad18c148c2 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -1339,6 +1339,9 @@ EXPORT_SYMBOL(mipi_dsi_dcs_set_pixel_format); * @dsi: DSI peripheral device * @scanline: scanline to use as trigger * + * This function is deprecated. Use mipi_dsi_dcs_set_tear_scanline_multi() + * instead. + * * Return: 0 on success or a negative error code on failure */ int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanli= ne) @@ -1833,6 +1836,34 @@ void mipi_dsi_dcs_set_page_address_multi(struct mipi= _dsi_multi_context *ctx, } EXPORT_SYMBOL(mipi_dsi_dcs_set_page_address_multi); =20 +/** + * mipi_dsi_dcs_set_tear_scanline_multi() - set the scanline to use as tri= gger for + * the Tearing Effect output signal of the display module + * @ctx: Context for multiple DSI transactions + * @scanline: scanline to use as trigger + * + * Like mipi_dsi_dcs_set_tear_scanline() but deals with errors in a way th= at + * makes it convenient to make several calls in a row. + */ +void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *c= tx, + u16 scanline) +{ + struct mipi_dsi_device *dsi =3D ctx->dsi; + struct device *dev =3D &dsi->dev; + int ret; + + if (ctx->accum_err) + return; + + ret =3D mipi_dsi_dcs_set_tear_scanline(dsi, scanline); + if (ret < 0) { + ctx->accum_err =3D ret; + dev_err(dev, "Failed to set tear scanline: %d\n", + ctx->accum_err); + } +} +EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_scanline_multi); + static int mipi_dsi_drv_probe(struct device *dev) { struct mipi_dsi_driver *drv =3D to_mipi_dsi_driver(dev->driver); diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 602be6ce081a..c823cc13ad1f 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -375,6 +375,8 @@ void mipi_dsi_dcs_set_column_address_multi(struct mipi_= dsi_multi_context *ctx, u16 start, u16 end); void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ct= x, u16 start, u16 end); +void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *c= tx, + u16 scanline); =20 /** * mipi_dsi_generic_write_seq - transmit data using a generic write packet --=20 2.46.0