Prepare the panel before it's enabled and un-prepare after disable, this will make sure that the regulators are switched on and off correctly.

Tested it on APQ8064 based IFC6410 with panel.

Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org --- drivers/gpu/drm/msm/mdp/mdp4/mdp4_lcdc_encoder.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lcdc_encoder.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lcdc_encoder.c index c048433..4cd6e72 100644 --- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lcdc_encoder.c +++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lcdc_encoder.c @@ -346,8 +346,10 @@ static void mdp4_lcdc_encoder_disable(struct drm_encoder *encoder)

mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0);

- if (panel) + if (panel) { drm_panel_disable(panel); + drm_panel_unprepare(panel); + }

/* * Wait for a vsync so we know the ENABLE=0 latched before @@ -412,8 +414,10 @@ static void mdp4_lcdc_encoder_enable(struct drm_encoder *encoder) if (ret) dev_err(dev->dev, "failed to enable lcdc_clk: %d\n", ret);

- if (panel) + if (panel) { + drm_panel_prepare(panel); drm_panel_enable(panel); + }

setup_phy(encoder);