On Fri, Jun 6, 2014 at 12:48 AM, Ajay kumar <ajaynumb@xxxxxxxxx> wrote:
> +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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