video: tegra: dc: fix display powerdomains

Change does the following
- enable clocks nvdisplayhub,nvdisplay_disp,nvdisplay_p0,
nvdisplay_p1,nvdisplay_p2,nvdisplay_dsc before enabling
head0 powerdomain before accessing any display register
as WAR to fix issues in kernel due to BL enabling all
display power domains unconditionally.
- unpowergate/powergate DPAUX powerdomain instead
of corresponding head power domain in display drivers
as per display powerdomains in guidelines.
- read powergate id for DPAUX based on compatible field
from dt.
- enable/disable dpaux powerdomain before I2C transfer
using DDC.
- code refactoring and cleanup.

Bug 200292406

Change-Id: I473c5aa74aceed6131dec9da848c588e9e3c490c
Signed-off-by: Santosh Reddy Galma <galmar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1547730
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 3 insertions, 8 deletions

diff --git a/drivers/video/tegra/dc/dp.c b/drivers/video/tegra/dc/dp.c
index b4d7c68af..3699efaee 100644
--- a/drivers/video/tegra/dc/dp.c
+++ b/drivers/video/tegra/dc/dp.c
@@ -2089,6 +2089,8 @@ static void _tegra_dpaux_init(struct tegra_dc_dp_data *dp)
 {
         if (dp->sor->safe_clk)
                 tegra_sor_safe_clk_enable(dp->sor);
+
+        tegra_unpowergate_partition(dp->dpaux->powergate_id);
         tegra_dpaux_clk_en(dp->dpaux);
 
         tegra_dc_io_start(dp->dc);
@@ -2119,11 +2121,6 @@ static int tegra_dc_dp_hotplug_init(struct tegra_dc *dc)
         struct tegra_dc_dp_data *dp = tegra_dc_get_outdata(dc);
 
         /*
-         * SOR partition must be awake for dpaux
-         */
-        tegra_dc_unpowergate_locked(dc);
-
-        /*
          * dp interrupts are received by dpaux.
          * Initialize dpaux to receive hotplug events.
          */
@@ -3213,7 +3210,7 @@ static void tegra_dc_dp_suspend(struct tegra_dc *dc)
 
         tegra_dp_hpd_suspend(dp);
 
-        tegra_dc_powergate_locked(dc);
+        tegra_powergate_partition(dp->dpaux->powergate_id);
 }
 
 static void tegra_dc_dp_resume(struct tegra_dc *dc)
@@ -3223,8 +3220,6 @@ static void tegra_dc_dp_resume(struct tegra_dc *dc)
         if (!dp->suspended)
                 return;
 
-        tegra_dc_unpowergate_locked(dc);
-
         if (dp->pdata->hdmi2fpd_bridge_enable)
                 hdmi2fpd_resume(dc);