@@ -563,10 +563,15 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi)
dsi->data_rate = DIV_ROUND_UP_ULL(pixel_clock * total_bits,
htotal * dsi->lanes);
+ if (dsi->panel) {
+ if (drm_panel_prepare_power(dsi->panel))
+ DRM_INFO("can't prepare power the panel\n");
+ }
+
ret = clk_set_rate(dsi->hs_clk, dsi->data_rate);
if (ret < 0) {
dev_err(dev, "Failed to set data rate: %d\n", ret);
- goto err_refcount;
+ goto err_prepare_power;
}
phy_power_on(dsi->phy);
@@ -605,13 +610,18 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi)
}
return 0;
+
err_disable_digital_clk:
clk_disable_unprepare(dsi->digital_clk);
err_disable_engine_clk:
clk_disable_unprepare(dsi->engine_clk);
err_phy_power_off:
phy_power_off(dsi->phy);
-err_refcount:
+err_prepare_power:
+ if (dsi->panel) {
+ if (drm_panel_unprepare_power(dsi->panel))
+ DRM_INFO("Can't unprepare power the panel\n");
+ }
dsi->refcount--;
return ret;
}
@@ -652,6 +662,11 @@ static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
clk_disable_unprepare(dsi->digital_clk);
phy_power_off(dsi->phy);
+
+ if (dsi->panel) {
+ if (drm_panel_unprepare_power(dsi->panel))
+ DRM_INFO("Can't unprepare power the panel\n");
+ }
}
static void mtk_output_dsi_enable(struct mtk_dsi *dsi)
Add the drm_panel_prepare_power and drm_panel_unprepare_power control. Turn on panel power(drm_panel_prepare_power) and control before dsi enable. And then dsi enable, send dcs cmd in drm_panel_prepare, last turn on backlight. Signed-off-by: Jitao Shi <jitao.shi@mediatek.com> --- drivers/gpu/drm/mediatek/mtk_dsi.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-)