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drm/mipi: use dcs write for mipi_dsi_dcs_set_tear_scanline 

[ Upstream commit 7a05c3b6d2 ]

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: e839508163 ("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.l.velikov@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Emil Velikov 2020-05-05 17:03:29 +01:00 committed by Greg Kroah-Hartman
parent 6f2b14006d
commit 835c6f7c0a
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/drm_mipi_dsi.c
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@ -1029,11 +1029,11 @@ 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;