Re: [PATCH 5/7] drm/exynos: dp: modify driver to support drm_panel

[Ajay kumar <ajaynumb@gmail.com>]

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Hi Jingoo,


On Fri, Apr 18, 2014 at 2:38 PM, Jingoo Han <jg1.han@samsung.com> wrote:

> On Wednesday, April 16, 2014 11:33 PM, Ajay Kumar wrote:
> >
> > This patch attaches the dp connector to exynos_dp_panel, and adds
> > calls to drm_panel functions to control panel power sequence.
> >
> > Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
> > ---
> >  drivers/gpu/drm/exynos/Kconfig          |  1 +
> >  drivers/gpu/drm/exynos/exynos_dp_core.c | 19 +++++++++++++++++++
> >  drivers/gpu/drm/exynos/exynos_dp_core.h |  1 +
> >  3 files changed, 21 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/exynos/Kconfig
> b/drivers/gpu/drm/exynos/Kconfig
> > index 5bf5bca..56af433 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 && ARCH_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 18fd9c5..6beeab6 100644
> > --- a/drivers/gpu/drm/exynos/exynos_dp_core.c
> > +++ b/drivers/gpu/drm/exynos/exynos_dp_core.c
> > @@ -28,6 +28,7 @@
> >  #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 "exynos_drm_drv.h"
> > @@ -1028,6 +1029,9 @@ static int exynos_dp_create_connector(struct
> exynos_drm_display *display,
> >       drm_sysfs_connector_add(connector);
> >       drm_mode_connector_attach_encoder(connector, encoder);
> >
> > +     if (dp->drm_panel)
> > +             drm_panel_attach(dp->drm_panel, &dp->connector);
> > +
> >       return 0;
> >  }
> >
> > @@ -1062,10 +1066,12 @@ static void exynos_dp_poweron(struct
> exynos_dp_device *dp)
> >       if (dp->dpms_mode == DRM_MODE_DPMS_ON)
> >               return;
> >
> > +     drm_panel_pre_enable(dp->drm_panel);
> >       clk_prepare_enable(dp->clock);
> >       exynos_dp_phy_init(dp);
> >       exynos_dp_init_dp(dp);
> >       enable_irq(dp->irq);
> > +     drm_panel_enable(dp->drm_panel);
> >  }
> >
> >  static void exynos_dp_poweroff(struct exynos_dp_device *dp)
> > @@ -1073,6 +1079,7 @@ static void exynos_dp_poweroff(struct
> exynos_dp_device *dp)
> >       if (dp->dpms_mode != DRM_MODE_DPMS_ON)
> >               return;
> >
> > +     drm_panel_disable(dp->drm_panel);
> >       disable_irq(dp->irq);
> >       flush_work(&dp->hotplug_work);
> >       exynos_dp_phy_exit(dp);
> > @@ -1225,6 +1232,7 @@ static int exynos_dp_dt_parse_panel(struct
> exynos_dp_device *dp)
> >  static int exynos_dp_bind(struct device *dev, struct device *master,
> void *data)
> >  {
> >       struct platform_device *pdev = to_platform_device(dev);
> > +     struct device_node *panel_node;
> >       struct drm_device *drm_dev = data;
> >       struct resource *res;
> >       struct exynos_dp_device *dp;
> > @@ -1299,6 +1307,17 @@ static int exynos_dp_bind(struct device *dev,
> struct device *master, void *data)
> >
> >       INIT_WORK(&dp->hotplug_work, exynos_dp_hotplug);
> >
> > +     panel_node = of_find_compatible_node(NULL, NULL,
> > +                                             "samsung,exynos-dp-panel");
> > +     if (panel_node) {
> > +             dp->drm_panel = of_drm_find_panel(panel_node);
> > +             if (!dp->drm_panel) {
> > +                     of_node_put(panel_node);
> > +                     return -ENODEV;
> > +             }
> > +             of_node_put(panel_node);
> > +     }
>
> The following is simpler.
>
> +       if (panel_node) {
> +               dp->drm_panel = of_drm_find_panel(panel_node);
> +               of_node_put(panel_node);
> +               if (!dp->drm_panel)
> +                       return -ENODEV;
> +       }
>
Right, will change it.


> Best regards,
> Jingoo Han
>
> > +
> >       exynos_dp_phy_init(dp);
> >
> >       exynos_dp_init_dp(dp);
> > diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.h
> b/drivers/gpu/drm/exynos/exynos_dp_core.h
> > index 56fa43e..9dc7991 100644
> > --- a/drivers/gpu/drm/exynos/exynos_dp_core.h
> > +++ b/drivers/gpu/drm/exynos/exynos_dp_core.h
> > @@ -148,6 +148,7 @@ struct exynos_dp_device {
> >       struct drm_device       *drm_dev;
> >       struct drm_connector    connector;
> >       struct drm_encoder      *encoder;
> > +     struct drm_panel        *drm_panel;
> >       struct clk              *clock;
> >       unsigned int            irq;
> >       void __iomem            *reg_base;
> > --
> > 1.8.1.2
>
>
Thanks and regards,
Ajay Kumar

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