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disp: msm: sde: delay backlight update until the first commit

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In the current implementation panel set backlight can be called even before
receiving a frame from the driver during the first commit. Hence there is
chance for some garbage content to be shown onto the panel. So this change
imposes a condition to delay backlight update of the panel until the
first frame is received from the HW.

This change includes only a missing portion of the original that was somehow
left out of the snapshot ported to 4.19. Original change ID is preserved.

Change-Id: I735a97088efef91159e724bba615549dba49e4e3
Signed-off-by: Tharun Raj Soma <tsoma@codeaurora.org>
Signed-off-by: Steve Cohen <cohens@codeaurora.org>
This commit is contained in:
Steve Cohen 2019-05-09 17:18:17 -04:00
commit bcbb734010
1 changed files with 14 additions and 8 deletions
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22
msm/sde/sde_connector.c
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@ -535,21 +535,27 @@ static int _sde_connector_update_bl_scale(struct sde_connector *c_conn)
bl_config = &dsi_display->panel->bl_config;
if (c_conn->bl_scale > MAX_BL_SCALE_LEVEL)
bl_config->bl_scale = MAX_BL_SCALE_LEVEL;
else
bl_config->bl_scale = c_conn->bl_scale;
if (dsi_display->panel->bl_config.bl_update ==
BL_UPDATE_DELAY_UNTIL_FIRST_FRAME &&
!c_conn->allow_bl_update) {
c_conn->unset_bl_level = bl_config->bl_level;
return 0;
}
if (c_conn->bl_scale_sv > MAX_SV_BL_SCALE_LEVEL)
bl_config->bl_scale_sv = MAX_SV_BL_SCALE_LEVEL;
else
bl_config->bl_scale_sv = c_conn->bl_scale_sv;
if (c_conn->unset_bl_level)
bl_config->bl_level = c_conn->unset_bl_level;
bl_config->bl_scale = c_conn->bl_scale > MAX_BL_SCALE_LEVEL ?
MAX_BL_SCALE_LEVEL : c_conn->bl_scale;
bl_config->bl_scale_sv = c_conn->bl_scale_sv > MAX_SV_BL_SCALE_LEVEL ?
MAX_SV_BL_SCALE_LEVEL : c_conn->bl_scale_sv;
SDE_DEBUG("bl_scale = %u, bl_scale_sv = %u, bl_level = %u\n",
bl_config->bl_scale, bl_config->bl_scale_sv,
bl_config->bl_level);
rc = c_conn->ops.set_backlight(&c_conn->base,
dsi_display, bl_config->bl_level);
c_conn->unset_bl_level = 0;
return rc;
}