Re: [PATCH v2 1/7] drm/bridge: Refactor out the panel wrapper from the lvds-encoder bridge.

2017-05-12 Thread Archit Taneja 

Hi,

On 05/12/2017 12:01 AM, Eric Anholt wrote:

Many DRM drivers have common code to make a stub connector
implementation that wraps a drm_panel.  By wrapping the panel in a DRM
bridge, all of the connector code (including calls during encoder
enable/disable) goes away.

v2: Fix build with CONFIG_DRM=m, drop "dev" argument that should just
be the panel's dev, move kerneldoc up a level and document
_remove().

Signed-off-by: Eric Anholt 
Acked-by: Daniel Vetter 
---
 Documentation/gpu/drm-kms-helpers.rst |   6 ++
 drivers/gpu/drm/Makefile  |   1 +
 drivers/gpu/drm/bridge/Kconfig|  11 +-
 drivers/gpu/drm/bridge/lvds-encoder.c | 157 ---
 drivers/gpu/drm/bridge/panel.c| 197 ++
 include/drm/drm_bridge.h  |   7 ++
 6 files changed, 238 insertions(+), 141 deletions(-)
 create mode 100644 drivers/gpu/drm/bridge/panel.c

diff --git a/Documentation/gpu/drm-kms-helpers.rst 
b/Documentation/gpu/drm-kms-helpers.rst
index c075aadd7078..7c5e2549a58a 100644
--- a/Documentation/gpu/drm-kms-helpers.rst
+++ b/Documentation/gpu/drm-kms-helpers.rst
@@ -143,6 +143,12 @@ Bridge Helper Reference
 .. kernel-doc:: drivers/gpu/drm/drm_bridge.c
:export:

+Panel-Bridge Helper Reference
+-
+
+.. kernel-doc:: drivers/gpu/drm/bridge/panel.c
+   :export:
+
 .. _drm_panel_helper:

 Panel Helper Reference
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index c156fecfb362..4cc9c02cc3f2 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -24,6 +24,7 @@ drm-$(CONFIG_COMPAT) += drm_ioc32.o
 drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
 drm-$(CONFIG_PCI) += ati_pcigart.o
 drm-$(CONFIG_DRM_PANEL) += drm_panel.o
+drm-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o
 drm-$(CONFIG_OF) += drm_of.o
 drm-$(CONFIG_AGP) += drm_agpsupport.o
 drm-$(CONFIG_DEBUG_FS) += drm_debugfs.o drm_debugfs_crc.o
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index f6968d3b4b41..c4daca38743c 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -4,6 +4,14 @@ config DRM_BRIDGE
help
  Bridge registration and lookup framework.

+config DRM_PANEL_BRIDGE
+   def_bool y
+   depends on DRM_BRIDGE
+   select DRM_KMS_HELPER
+   select DRM_PANEL
+   help
+ DRM bridge wrapper of DRM panels
+
 menu "Display Interface Bridges"
depends on DRM && DRM_BRIDGE

@@ -27,8 +35,7 @@ config DRM_DUMB_VGA_DAC
 config DRM_LVDS_ENCODER
tristate "Transparent parallel to LVDS encoder support"
depends on OF
-   select DRM_KMS_HELPER
-   select DRM_PANEL
+   select DRM_PANEL_BRIDGE
help
  Support for transparent parallel to LVDS encoders that don't require
  any configuration.
diff --git a/drivers/gpu/drm/bridge/lvds-encoder.c 
b/drivers/gpu/drm/bridge/lvds-encoder.c
index f1f67a279426..0903ba574f61 100644
--- a/drivers/gpu/drm/bridge/lvds-encoder.c
+++ b/drivers/gpu/drm/bridge/lvds-encoder.c
@@ -8,144 +8,18 @@
  */

 #include 
-#include 
-#include 
-#include 
-#include 
-#include 
+#include 
 #include 

 #include 

-struct lvds_encoder {
-   struct device *dev;
-
-   struct drm_bridge bridge;
-   struct drm_connector connector;
-   struct drm_panel *panel;
-};
-
-static inline struct lvds_encoder *
-drm_bridge_to_lvds_encoder(struct drm_bridge *bridge)
-{
-   return container_of(bridge, struct lvds_encoder, bridge);
-}
-
-static inline struct lvds_encoder *
-drm_connector_to_lvds_encoder(struct drm_connector *connector)
-{
-   return container_of(connector, struct lvds_encoder, connector);
-}
-
-static int lvds_connector_get_modes(struct drm_connector *connector)
-{
-   struct lvds_encoder *lvds = drm_connector_to_lvds_encoder(connector);
-
-   return drm_panel_get_modes(lvds->panel);
-}
-
-static const struct drm_connector_helper_funcs lvds_connector_helper_funcs = {
-   .get_modes = lvds_connector_get_modes,
-};
-
-static const struct drm_connector_funcs lvds_connector_funcs = {
-   .dpms = drm_atomic_helper_connector_dpms,
-   .reset = drm_atomic_helper_connector_reset,
-   .fill_modes = drm_helper_probe_single_connector_modes,
-   .destroy = drm_connector_cleanup,
-   .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-   .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static int lvds_encoder_attach(struct drm_bridge *bridge)
-{
-   struct lvds_encoder *lvds = drm_bridge_to_lvds_encoder(bridge);
-   struct drm_connector *connector = >connector;
-   int ret;
-
-   if (!bridge->encoder) {
-   DRM_ERROR("Missing encoder\n");
-   return -ENODEV;
-   }
-
-   drm_connector_helper_add(connector, _connector_helper_funcs);
-
-   ret = drm_connector_init(bridge->dev,

Re: [PATCH v2 1/7] drm/bridge: Refactor out the panel wrapper from the lvds-encoder bridge.

2017-05-12 Thread Boris Brezillon 
On Thu, 11 May 2017 11:31:22 -0700
Eric Anholt  wrote:

> Many DRM drivers have common code to make a stub connector
> implementation that wraps a drm_panel.  By wrapping the panel in a DRM
> bridge, all of the connector code (including calls during encoder
> enable/disable) goes away.
> 
> v2: Fix build with CONFIG_DRM=m, drop "dev" argument that should just
> be the panel's dev, move kerneldoc up a level and document
> _remove().
> 
> Signed-off-by: Eric Anholt 
> Acked-by: Daniel Vetter 

Reviewed-by: Boris Brezillon 

> ---
>  Documentation/gpu/drm-kms-helpers.rst |   6 ++
>  drivers/gpu/drm/Makefile  |   1 +
>  drivers/gpu/drm/bridge/Kconfig|  11 +-
>  drivers/gpu/drm/bridge/lvds-encoder.c | 157 ---
>  drivers/gpu/drm/bridge/panel.c| 197 
> ++
>  include/drm/drm_bridge.h  |   7 ++
>  6 files changed, 238 insertions(+), 141 deletions(-)
>  create mode 100644 drivers/gpu/drm/bridge/panel.c
> 
> diff --git a/Documentation/gpu/drm-kms-helpers.rst 
> b/Documentation/gpu/drm-kms-helpers.rst
> index c075aadd7078..7c5e2549a58a 100644
> --- a/Documentation/gpu/drm-kms-helpers.rst
> +++ b/Documentation/gpu/drm-kms-helpers.rst
> @@ -143,6 +143,12 @@ Bridge Helper Reference
>  .. kernel-doc:: drivers/gpu/drm/drm_bridge.c
> :export:
>  
> +Panel-Bridge Helper Reference
> +-
> +
> +.. kernel-doc:: drivers/gpu/drm/bridge/panel.c
> +   :export:
> +
>  .. _drm_panel_helper:
>  
>  Panel Helper Reference
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index c156fecfb362..4cc9c02cc3f2 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -24,6 +24,7 @@ drm-$(CONFIG_COMPAT) += drm_ioc32.o
>  drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
>  drm-$(CONFIG_PCI) += ati_pcigart.o
>  drm-$(CONFIG_DRM_PANEL) += drm_panel.o
> +drm-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o
>  drm-$(CONFIG_OF) += drm_of.o
>  drm-$(CONFIG_AGP) += drm_agpsupport.o
>  drm-$(CONFIG_DEBUG_FS) += drm_debugfs.o drm_debugfs_crc.o
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index f6968d3b4b41..c4daca38743c 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -4,6 +4,14 @@ config DRM_BRIDGE
>   help
> Bridge registration and lookup framework.
>  
> +config DRM_PANEL_BRIDGE
> + def_bool y
> + depends on DRM_BRIDGE
> + select DRM_KMS_HELPER
> + select DRM_PANEL
> + help
> +   DRM bridge wrapper of DRM panels
> +
>  menu "Display Interface Bridges"
>   depends on DRM && DRM_BRIDGE
>  
> @@ -27,8 +35,7 @@ config DRM_DUMB_VGA_DAC
>  config DRM_LVDS_ENCODER
>   tristate "Transparent parallel to LVDS encoder support"
>   depends on OF
> - select DRM_KMS_HELPER
> - select DRM_PANEL
> + select DRM_PANEL_BRIDGE
>   help
> Support for transparent parallel to LVDS encoders that don't require
> any configuration.
> diff --git a/drivers/gpu/drm/bridge/lvds-encoder.c 
> b/drivers/gpu/drm/bridge/lvds-encoder.c
> index f1f67a279426..0903ba574f61 100644
> --- a/drivers/gpu/drm/bridge/lvds-encoder.c
> +++ b/drivers/gpu/drm/bridge/lvds-encoder.c
> @@ -8,144 +8,18 @@
>   */
>  
>  #include 
> -#include 
> -#include 
> -#include 
> -#include 
> -#include 
> +#include 
>  #include 
>  
>  #include 
>  
> -struct lvds_encoder {
> - struct device *dev;
> -
> - struct drm_bridge bridge;
> - struct drm_connector connector;
> - struct drm_panel *panel;
> -};
> -
> -static inline struct lvds_encoder *
> -drm_bridge_to_lvds_encoder(struct drm_bridge *bridge)
> -{
> - return container_of(bridge, struct lvds_encoder, bridge);
> -}
> -
> -static inline struct lvds_encoder *
> -drm_connector_to_lvds_encoder(struct drm_connector *connector)
> -{
> - return container_of(connector, struct lvds_encoder, connector);
> -}
> -
> -static int lvds_connector_get_modes(struct drm_connector *connector)
> -{
> - struct lvds_encoder *lvds = drm_connector_to_lvds_encoder(connector);
> -
> - return drm_panel_get_modes(lvds->panel);
> -}
> -
> -static const struct drm_connector_helper_funcs lvds_connector_helper_funcs = 
> {
> - .get_modes = lvds_connector_get_modes,
> -};
> -
> -static const struct drm_connector_funcs lvds_connector_funcs = {
> - .dpms = drm_atomic_helper_connector_dpms,
> - .reset = drm_atomic_helper_connector_reset,
> - .fill_modes = drm_helper_probe_single_connector_modes,
> - .destroy = drm_connector_cleanup,
> - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> -};
> -
> -static int lvds_encoder_attach(struct drm_bridge *bridge)
> -{
> - struct lvds_encoder *lvds =

[PATCH v2 1/7] drm/bridge: Refactor out the panel wrapper from the lvds-encoder bridge.

2017-05-11 Thread Eric Anholt 
Many DRM drivers have common code to make a stub connector
implementation that wraps a drm_panel.  By wrapping the panel in a DRM
bridge, all of the connector code (including calls during encoder
enable/disable) goes away.

v2: Fix build with CONFIG_DRM=m, drop "dev" argument that should just
be the panel's dev, move kerneldoc up a level and document
_remove().

Signed-off-by: Eric Anholt 
Acked-by: Daniel Vetter 
---
 Documentation/gpu/drm-kms-helpers.rst |   6 ++
 drivers/gpu/drm/Makefile  |   1 +
 drivers/gpu/drm/bridge/Kconfig|  11 +-
 drivers/gpu/drm/bridge/lvds-encoder.c | 157 ---
 drivers/gpu/drm/bridge/panel.c| 197 ++
 include/drm/drm_bridge.h  |   7 ++
 6 files changed, 238 insertions(+), 141 deletions(-)
 create mode 100644 drivers/gpu/drm/bridge/panel.c

diff --git a/Documentation/gpu/drm-kms-helpers.rst 
b/Documentation/gpu/drm-kms-helpers.rst
index c075aadd7078..7c5e2549a58a 100644
--- a/Documentation/gpu/drm-kms-helpers.rst
+++ b/Documentation/gpu/drm-kms-helpers.rst
@@ -143,6 +143,12 @@ Bridge Helper Reference
 .. kernel-doc:: drivers/gpu/drm/drm_bridge.c
:export:
 
+Panel-Bridge Helper Reference
+-
+
+.. kernel-doc:: drivers/gpu/drm/bridge/panel.c
+   :export:
+
 .. _drm_panel_helper:
 
 Panel Helper Reference
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index c156fecfb362..4cc9c02cc3f2 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -24,6 +24,7 @@ drm-$(CONFIG_COMPAT) += drm_ioc32.o
 drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
 drm-$(CONFIG_PCI) += ati_pcigart.o
 drm-$(CONFIG_DRM_PANEL) += drm_panel.o
+drm-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o
 drm-$(CONFIG_OF) += drm_of.o
 drm-$(CONFIG_AGP) += drm_agpsupport.o
 drm-$(CONFIG_DEBUG_FS) += drm_debugfs.o drm_debugfs_crc.o
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index f6968d3b4b41..c4daca38743c 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -4,6 +4,14 @@ config DRM_BRIDGE
help
  Bridge registration and lookup framework.
 
+config DRM_PANEL_BRIDGE
+   def_bool y
+   depends on DRM_BRIDGE
+   select DRM_KMS_HELPER
+   select DRM_PANEL
+   help
+ DRM bridge wrapper of DRM panels
+
 menu "Display Interface Bridges"
depends on DRM && DRM_BRIDGE
 
@@ -27,8 +35,7 @@ config DRM_DUMB_VGA_DAC
 config DRM_LVDS_ENCODER
tristate "Transparent parallel to LVDS encoder support"
depends on OF
-   select DRM_KMS_HELPER
-   select DRM_PANEL
+   select DRM_PANEL_BRIDGE
help
  Support for transparent parallel to LVDS encoders that don't require
  any configuration.
diff --git a/drivers/gpu/drm/bridge/lvds-encoder.c 
b/drivers/gpu/drm/bridge/lvds-encoder.c
index f1f67a279426..0903ba574f61 100644
--- a/drivers/gpu/drm/bridge/lvds-encoder.c
+++ b/drivers/gpu/drm/bridge/lvds-encoder.c
@@ -8,144 +8,18 @@
  */
 
 #include 
-#include 
-#include 
-#include 
-#include 
-#include 
+#include 
 #include 
 
 #include 
 
-struct lvds_encoder {
-   struct device *dev;
-
-   struct drm_bridge bridge;
-   struct drm_connector connector;
-   struct drm_panel *panel;
-};
-
-static inline struct lvds_encoder *
-drm_bridge_to_lvds_encoder(struct drm_bridge *bridge)
-{
-   return container_of(bridge, struct lvds_encoder, bridge);
-}
-
-static inline struct lvds_encoder *
-drm_connector_to_lvds_encoder(struct drm_connector *connector)
-{
-   return container_of(connector, struct lvds_encoder, connector);
-}
-
-static int lvds_connector_get_modes(struct drm_connector *connector)
-{
-   struct lvds_encoder *lvds = drm_connector_to_lvds_encoder(connector);
-
-   return drm_panel_get_modes(lvds->panel);
-}
-
-static const struct drm_connector_helper_funcs lvds_connector_helper_funcs = {
-   .get_modes = lvds_connector_get_modes,
-};
-
-static const struct drm_connector_funcs lvds_connector_funcs = {
-   .dpms = drm_atomic_helper_connector_dpms,
-   .reset = drm_atomic_helper_connector_reset,
-   .fill_modes = drm_helper_probe_single_connector_modes,
-   .destroy = drm_connector_cleanup,
-   .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-   .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static int lvds_encoder_attach(struct drm_bridge *bridge)
-{
-   struct lvds_encoder *lvds = drm_bridge_to_lvds_encoder(bridge);
-   struct drm_connector *connector = >connector;
-   int ret;
-
-   if (!bridge->encoder) {
-   DRM_ERROR("Missing encoder\n");
-   return -ENODEV;
-   }
-
-   drm_connector_helper_add(connector, _connector_helper_funcs);
-
-   ret = drm_connector_init(bridge->dev, connector, _connector_funcs,
-