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 | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index a1ff152ef468..455fe582c6b5 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -615,10 +615,13 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi) dsi->data_rate = DIV_ROUND_UP_ULL(dsi->vm.pixelclock * bit_per_pixel, dsi->lanes);
+ if (panel_bridge_prepare_power(dsi->next_bridge)) + 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); @@ -661,7 +664,9 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi) clk_disable_unprepare(dsi->engine_clk); err_phy_power_off: phy_power_off(dsi->phy); -err_refcount: +err_prepare_power: + if (panel_bridge_unprepare_power(dsi->next_bridge)) + DRM_INFO("Can't unprepare power the panel\n"); dsi->refcount--; return ret; } @@ -694,6 +699,9 @@ static void mtk_dsi_poweroff(struct mtk_dsi *dsi) clk_disable_unprepare(dsi->digital_clk);
phy_power_off(dsi->phy); + + if (panel_bridge_unprepare_power(dsi->next_bridge)) + DRM_INFO("Can't unprepare power the panel\n"); }
static void mtk_output_dsi_enable(struct mtk_dsi *dsi)