From: Emil Velikov emil.velikov@collabora.com
[ Upstream commit 7a05c3b6d24b8460b3cec436cf1d33fac43c8450 ]
The helper uses the MIPI_DCS_SET_TEAR_SCANLINE, although it's currently using the generic write. This does not look right.
Perhaps some platforms don't distinguish between the two writers?
Cc: Robert Chiras robert.chiras@nxp.com Cc: Vinay Simha BN simhavcs@gmail.com Cc: Jani Nikula jani.nikula@intel.com Cc: Thierry Reding treding@nvidia.com Fixes: e83950816367 ("drm/dsi: Implement set tear scanline") Signed-off-by: Emil Velikov emil.velikov@collabora.com Reviewed-by: Thierry Reding treding@nvidia.com Signed-off-by: Sam Ravnborg sam@ravnborg.org Link: https://patchwork.freedesktop.org/patch/msgid/20200505160329.2976059-3-emil.... Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/gpu/drm/drm_mipi_dsi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index 80b75501f5c6a..7ed8e510565ec 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -1034,11 +1034,11 @@ EXPORT_SYMBOL(mipi_dsi_dcs_set_pixel_format); */ int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline) { - u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, scanline >> 8, - scanline & 0xff }; + u8 payload[2] = { scanline >> 8, scanline & 0xff }; ssize_t err;
- err = mipi_dsi_generic_write(dsi, payload, sizeof(payload)); + err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_SCANLINE, payload, + sizeof(payload)); if (err < 0) return err;