+Device tree list
On Fri, Jun 6, 2014 at 12:40 AM, Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx> wrote:
> exynos_dp supports a simple bridge chain with ptn3460 bridge
> and an LVDS panel attached to it.
> This patch creates the bridge chain with ptn3460 as the head
> of the list and panel_binder being the tail.
>
> Also, DERER_PROBE for exynos_dp is tested with this patch.
>
> Signed-off-by: Ajay Kumar <ajaykumar.rs@xxxxxxxxxxx>
> ---
> .../devicetree/bindings/video/exynos_dp.txt | 2 +
> drivers/gpu/drm/exynos/Kconfig | 1 +
> drivers/gpu/drm/exynos/exynos_dp_core.c | 39 +++++++++++++++-----
> drivers/gpu/drm/exynos/exynos_dp_core.h | 1 +
> 4 files changed, 34 insertions(+), 9 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt b/Documentation/devicetree/bindings/video/exynos_dp.txt
> index 53dbccf..0c118ff 100644
> --- a/Documentation/devicetree/bindings/video/exynos_dp.txt
> +++ b/Documentation/devicetree/bindings/video/exynos_dp.txt
> @@ -51,6 +51,8 @@ Required properties for dp-controller:
> LANE_COUNT1 = 1, LANE_COUNT2 = 2, LANE_COUNT4 = 4
> - display-timings: timings for the connected panel as described by
> Documentation/devicetree/bindings/video/display-timing.txt
> + -edp-panel:
> + phandle for the drm_panel node required by panel_binder.
>
> Optional properties for dp-controller:
> -interlaced:
> diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
> index 178d2a9..fd1c070 100644
> --- a/drivers/gpu/drm/exynos/Kconfig
> +++ b/drivers/gpu/drm/exynos/Kconfig
> @@ -52,6 +52,7 @@ config DRM_EXYNOS_DP
> bool "EXYNOS DRM DP driver support"
> depends on DRM_EXYNOS_FIMD && ARCH_EXYNOS && (DRM_PTN3460=n || DRM_PTN3460=y || DRM_PTN3460=DRM_EXYNOS)
> default DRM_EXYNOS
> + select DRM_PANEL
> help
> This enables support for DP device.
>
> diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c
> index 414f5e5..a608f5c 100644
> --- a/drivers/gpu/drm/exynos/exynos_dp_core.c
> +++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
> @@ -28,7 +28,9 @@
> #include <drm/drmP.h>
> #include <drm/drm_crtc.h>
> #include <drm/drm_crtc_helper.h>
> +#include <drm/drm_panel.h>
> #include <drm/bridge/ptn3460.h>
> +#include <drm/bridge/panel_binder.h>
>
> #include "exynos_drm_drv.h"
> #include "exynos_dp_core.h"
> @@ -983,7 +985,7 @@ static int exynos_drm_attach_lcd_bridge(struct exynos_dp_device *dp,
> struct drm_encoder *encoder)
> {
> struct bridge_init bridge;
> - struct drm_bridge *bridge_chain = NULL;
> + struct drm_bridge *bridge_chain = NULL, *next = NULL;
> bool connector_created = false;
>
> if (find_bridge("nxp,ptn3460", &bridge)) {
> @@ -991,6 +993,14 @@ static int exynos_drm_attach_lcd_bridge(struct exynos_dp_device *dp,
> bridge.node);
> }
>
> + if (dp->edp_panel) {
> + next = panel_binder_init(dp->drm_dev, encoder, bridge.client,
> + bridge.node, dp->edp_panel, DRM_CONNECTOR_POLL_HPD);
> + if (next)
> + connector_created = true;
> + drm_bridge_add_to_chain(bridge_chain, next);
> + }
> +
> return connector_created;
> }
>
> @@ -1215,16 +1225,10 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
> struct platform_device *pdev = to_platform_device(dev);
> struct drm_device *drm_dev = data;
> struct resource *res;
> - struct exynos_dp_device *dp;
> + struct exynos_dp_device *dp = exynos_dp_display.ctx;
> unsigned int irq_flags;
> -
> int ret = 0;
>
> - dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
> - GFP_KERNEL);
> - if (!dp)
> - return -ENOMEM;
> -
> dp->dev = &pdev->dev;
> dp->dpms_mode = DRM_MODE_DPMS_OFF;
>
> @@ -1298,7 +1302,6 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
> disable_irq(dp->irq);
>
> dp->drm_dev = drm_dev;
> - exynos_dp_display.ctx = dp;
>
> platform_set_drvdata(pdev, &exynos_dp_display);
>
> @@ -1325,6 +1328,9 @@ static const struct component_ops exynos_dp_ops = {
>
> static int exynos_dp_probe(struct platform_device *pdev)
> {
> + struct device *dev = &pdev->dev;
> + struct device_node *panel_node;
> + struct exynos_dp_device *dp;
> int ret;
>
> ret = exynos_drm_component_add(&pdev->dev, EXYNOS_DEVICE_TYPE_CONNECTOR,
> @@ -1332,6 +1338,21 @@ static int exynos_dp_probe(struct platform_device *pdev)
> if (ret)
> return ret;
>
> + dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
> + GFP_KERNEL);
> + if (!dp)
> + return -ENOMEM;
> +
> + panel_node = of_parse_phandle(dev->of_node, "edp-panel", 0);
> + if (panel_node) {
> + dp->edp_panel = of_drm_find_panel(panel_node);
> + of_node_put(panel_node);
> + if (!dp->edp_panel)
> + return -EPROBE_DEFER;
> + }
> +
> + exynos_dp_display.ctx = dp;
> +
> ret = component_add(&pdev->dev, &exynos_dp_ops);
> if (ret)
> exynos_drm_component_del(&pdev->dev,
> diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.h b/drivers/gpu/drm/exynos/exynos_dp_core.h
> index 02cc4f9..26a64d3 100644
> --- a/drivers/gpu/drm/exynos/exynos_dp_core.h
> +++ b/drivers/gpu/drm/exynos/exynos_dp_core.h
> @@ -149,6 +149,7 @@ struct exynos_dp_device {
> struct drm_device *drm_dev;
> struct drm_connector connector;
> struct drm_encoder *encoder;
> + struct drm_panel *edp_panel;
> struct clk *clock;
> unsigned int irq;
> void __iomem *reg_base;
> --
> 1.7.9.5
>
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