diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2018-08-22 16:21:33 +0300 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2018-09-25 00:41:05 +0300 |
| commit | ffd15c3e7898cfb6d2a986b2aa8014ad7dc9e333 (patch) | |
| tree | c54d51c5e4080929b11f62d4085356924c1ec810 /drivers/gpu/drm/rcar-du/rcar_du_drv.c | |
| parent | 9144adc5e5a99577bce0d4ee2ca3615f53b9d296 (diff) | |
| download | linux-ffd15c3e7898cfb6d2a986b2aa8014ad7dc9e333.tar.xz | |
drm: rcar-du: Don't use TV sync mode when not supported by the hardware
The official way to stop the display is to clear the display enable
(DEN) bit in the DSYSR register, but that operates at a group level and
affects the two channels in the group. To disable channels selectively,
the driver uses TV sync mode that stops display operation on the channel
and turns output signals into inputs.
While TV sync mode is available in all DU models currently supported,
the D3 and E3 DUs don't support it. We will thus need to find an
alternative way to turn channels off.
In the meantime, condition the switch to TV sync mode to the
availability of the feature, to avoid writing an invalid value to the
DSYSR register. When the feature is unavailable the display output will
turn blank as all planes are disabled when stopping the CRTC.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Diffstat (limited to 'drivers/gpu/drm/rcar-du/rcar_du_drv.c')
| -rw-r--r-- | drivers/gpu/drm/rcar-du/rcar_du_drv.c | 33 |
1 files changed, 22 insertions, 11 deletions
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c index 0954ecd2f943..fa0d381c2d0f 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c @@ -36,7 +36,8 @@ static const struct rcar_du_device_info rzg1_du_r8a7743_info = { .gen = 2, .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(1) | BIT(0), .routes = { /* @@ -58,7 +59,8 @@ static const struct rcar_du_device_info rzg1_du_r8a7745_info = { .gen = 2, .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(1) | BIT(0), .routes = { /* @@ -77,7 +79,8 @@ static const struct rcar_du_device_info rzg1_du_r8a7745_info = { static const struct rcar_du_device_info rcar_du_r8a7779_info = { .gen = 2, - .features = RCAR_DU_FEATURE_INTERLACED, + .features = RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(1) | BIT(0), .routes = { /* @@ -99,7 +102,8 @@ static const struct rcar_du_device_info rcar_du_r8a7790_info = { .gen = 2, .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .quirks = RCAR_DU_QUIRK_ALIGN_128B, .channels_mask = BIT(2) | BIT(1) | BIT(0), .routes = { @@ -128,7 +132,8 @@ static const struct rcar_du_device_info rcar_du_r8a7791_info = { .gen = 2, .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(1) | BIT(0), .routes = { /* @@ -151,7 +156,8 @@ static const struct rcar_du_device_info rcar_du_r8a7792_info = { .gen = 2, .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(1) | BIT(0), .routes = { /* R8A7792 has two RGB outputs. */ @@ -170,7 +176,8 @@ static const struct rcar_du_device_info rcar_du_r8a7794_info = { .gen = 2, .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(1) | BIT(0), .routes = { /* @@ -193,7 +200,8 @@ static const struct rcar_du_device_info rcar_du_r8a7795_info = { .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS | RCAR_DU_FEATURE_VSP1_SOURCE - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(3) | BIT(2) | BIT(1) | BIT(0), .routes = { /* @@ -226,7 +234,8 @@ static const struct rcar_du_device_info rcar_du_r8a7796_info = { .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS | RCAR_DU_FEATURE_VSP1_SOURCE - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(2) | BIT(1) | BIT(0), .routes = { /* @@ -255,7 +264,8 @@ static const struct rcar_du_device_info rcar_du_r8a77965_info = { .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS | RCAR_DU_FEATURE_VSP1_SOURCE - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(3) | BIT(1) | BIT(0), .routes = { /* @@ -284,7 +294,8 @@ static const struct rcar_du_device_info rcar_du_r8a77970_info = { .features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_EXT_CTRL_REGS | RCAR_DU_FEATURE_VSP1_SOURCE - | RCAR_DU_FEATURE_INTERLACED, + | RCAR_DU_FEATURE_INTERLACED + | RCAR_DU_FEATURE_TVM_SYNC, .channels_mask = BIT(0), .routes = { /* R8A77970 has one RGB output and one LVDS output. */ |