Provide a small convenience wrapper that transmits a set_tear_scanline command.
Cc: Archit Taneja archit.taneja@gmail.com Cc: John Stultz john.stultz@linaro.org Cc: Thierry Reding thierry.reding@gmail.com Cc: Sumit Semwal sumit.semwal@linaro.org Cc: Jani Nikula jani.nikula@linux.intel.com Signed-off-by: Vinay Simha BN simhavcs@gmail.com
-- v1: * helper function suggested by Thierry for set_tear_scanline * Also includes small build fixes from Sumit Semwal.
v2: * one scanline parameter suggested by jani
v3: * passing the payload properly as suggested by jani -- --- drivers/gpu/drm/drm_mipi_dsi.c | 22 ++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 1 + 2 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index f5d8083..7938ce7 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -983,6 +983,28 @@ int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on);
/** + * mipi_dsi_set_tear_scanline() - turn on the display module's Tearing Effect + * output signal on the TE signal line when display module reaches line N + * defined by STS[n:0]. + * @dsi: DSI peripheral device + * @param: STS[10:0] + * Return: 0 on success or a negative error code on failure + */ +int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param) +{ + u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, param >> 8, + param & 0xff }; + ssize_t err; + + err = mipi_dsi_generic_write(dsi, payload, sizeof(payload)); + if (err < 0) + return err; + + return 0; +} +EXPORT_SYMBOL(mipi_dsi_set_tear_scanline); + +/** * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image * data used by the interface * @dsi: DSI peripheral device diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 7a9840f..ec55285 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -263,6 +263,7 @@ int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, u16 end); int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, u16 end); +int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param); int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, enum mipi_dsi_dcs_tear_mode mode);