kernel/linux.git/drivers/gpu/drm/exynos, branch v3.16.50

drm/exynos: enable vsync interrupt while waiting for vblank

2014-06-24T14:44:50+00:00

mixer_wait_for_vblank function expects that the upcoming vsync interrupt handler routine will clear the wait_vsync_event atomic variable. For this to happen, interrupts should be enabled and disabled properly. Signed-off-by: Rahul Sharma Signed-off-by: Inki Dae

drm/exynos: soft reset mixer before reconfigure after power-on

2014-06-24T14:44:49+00:00

Mixer soft reset is a recommended step before reconfiguring the mixer after power on. Mixer looses the previous state of DMAs if soft reset. This is the recommendation from the hardware team. Signed-off-by: Rahul Sharma Signed-off-by: Inki Dae

drm/exynos: allow multiple layer updates per vsync for mixer

2014-06-24T14:44:30+00:00

Allowing only one layer update per vsync can cause issues while there are update available for both layers. There is a good amount of possibility to loose updates if we allow single update per vsync. Signed-off-by: Rahul Sharma Signed-off-by: Inki Dae

drm/exynos: stop mixer before gating clocks during poweroff

2014-06-24T02:27:29+00:00

Mixer should be power gated only after it is gracefully stopped. The recommended sequence is to Stop the mixer and wait till it enters to IDLE state before gating the clocks and power to the mixer. Signed-off-by: Rahul Sharma Signed-off-by: Inki Dae

drm/exynos: set power state variable after enabling clocks and power

2014-06-24T02:25:57+00:00

Power state variable holds the state of the mixer device. Power on and power off functions are toggling these variable at wrong place. State variable should be changed to true only after Runtime PM and clocks are enabled. Else it may result to a situation where mixer registers are accessed with device power enabled. Similar logic for poweroff sequence. Signed-off-by: Rahul Sharma Signed-off-by: Inki Dae

drm/exynos: disable unused windows on apply

2014-06-24T02:11:54+00:00

The patch disables non-enabled HW windows on applying configuration, it will allow to clear windows enabled by bootloader. Signed-off-by: Andrzej Hajda Signed-off-by: Inki Dae

drm/exynos: Fix de-registration ordering

2014-06-24T02:11:54+00:00

'exynos_drm_pdev' was not getting unregistered if platform_driver_register() failed. Fix the ordering to allow this. This also fixes the below warning by moving the #endif macro. While at it also fix the ordering in the exit function so that de-registration happens in opposite order of registration. drivers/gpu/drm/exynos/exynos_drm_drv.c:768:1: warning: label 'err_unregister_pd' defined but not used [-Wunused-label] Signed-off-by: Sachin Kamat Signed-off-by: Inki Dae

drm/exynos: change zero to NULL for sparse

2014-06-24T02:11:54+00:00

We recently changed this function to return a pointer instead of an int so we need to change this zero to a NULL or Sparse complains: drivers/gpu/drm/exynos/exynos_drm_drv.h:346:47: warning: Using plain integer as NULL pointer Signed-off-by: Dan Carpenter Signed-off-by: Inki Dae

drm/exynos: dpi: Fix NULL pointer dereference with legacy bindings

2014-06-24T02:11:54+00:00

If there is no panel node in DT and instead display timings are provided directly in FIMD node, there is no panel object created and ctx->panel becomes NULL. However during Exynos DRM initialization drm_helper_hpd_irq_event() is called, which in turns calls exynos_dpi_detect(), which dereferences ctx->panel without a check, causing a NULL pointer derefrence. This patch fixes the issue by adding necessary NULL pointer check. Signed-off-by: Tomasz Figa Reviewed-by: Jingoo Han Signed-off-by: Inki Dae

drm/exynos: hdmi: fix power order issue

2014-06-24T02:11:54+00:00

This patch resolves page fault issue of Mixer when disabled. The SFRs of VP and Mixer are updated by Vertical Sync of Timing generator which is a part of HDMI so the sequence to disable TV Subsystem should be as following: VP -> Mixer -> HDMI For this, this patch disables Mixer and VP (if used) prior to disabling HDMI. Signed-off-by: Inki Dae