video: tegra: dc: Support for pre power-off actions

Part of panel settings need to be done before/after pixel clock
is disabled. Add support for these actions to meet panel
spec.

bug 976081

Signed-off-by: Ken Chang <kenc@nvidia.com>
Reviewed-on: http://git-master/r/102542
Reviewed-by: Lokesh Pathak <lpathak@nvidia.com>
Tested-by: Lokesh Pathak <lpathak@nvidia.com>
(cherry picked from commit dcecdc64d4d0fd4d9f69df52c9d200dfbf1dd7fc)

Change-Id: Ibfede68d67a4815156f73c2d1cdca90f3f771755
Reviewed-on: http://git-master/r/110296
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
Rebase-Id: Rf7e4c33a9f956e74a6a24bb8dae948db91bf016f

diff --git a/arch/arm/mach-tegra/include/mach/dc.h b/arch/arm/mach-tegra/include/mach/dc.h
index 0e80694adc7902573f7c4cee3f6827e9a9915338..5f4a2a384aba6affd4ef4a0707083dbdd4846463 100644 (file)
--- a/arch/arm/mach-tegra/include/mach/dc.h
+++ b/arch/arm/mach-tegra/include/mach/dc.h
@@ -402,6 +402,7 @@ struct tegra_dc_out {
 
        int     (*enable)(void);
        int     (*postpoweron)(void);
+       int     (*prepoweroff)(void);
        int     (*disable)(void);
 
        int     (*hotplug_init)(void);

diff --git a/drivers/video/tegra/dc/dc.c b/drivers/video/tegra/dc/dc.c
index 7c5388e33d74d6233f2545659670244bc4ee444b..c52dba7f89eeabed0ac7ea00e72e4b6b4553d406 100644 (file)
--- a/drivers/video/tegra/dc/dc.c
+++ b/drivers/video/tegra/dc/dc.c
@@ -2796,6 +2796,9 @@ static void _tegra_dc_controller_disable(struct tegra_dc *dc)
 {
        unsigned i;
 
+       if (dc->out && dc->out->prepoweroff)
+               dc->out->prepoweroff();
+
        if (dc->out_ops && dc->out_ops->disable)
                dc->out_ops->disable(dc);