On 30.12.2018 18:48, Sam Ravnborg wrote:

drmP.h is an relic from the days when there was a single header file. To enable the removal of drmP.h from all users drop include of drmP.h from bridge/dw_hdmi.h.

A few files relied on the file included in drmP.h - add explicit include statements or forward declarations to these files. Build tested with arm and x86.

v2:

• prefer forward declarations when possible (Laurent Pinchart)
• sort include files (Laurent Pinchart)

Signed-off-by: Sam Ravnborg sam@ravnborg.org Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Cc: Archit Taneja architt@codeaurora.org Cc: Andrzej Hajda a.hajda@samsung.com Cc: David Airlie airlied@linux.ie Cc: Daniel Vetter daniel@ffwll.ch Cc: Kieran Bingham kieran.bingham+renesas@ideasonboard.com Cc: Fabio Estevam fabio.estevam@nxp.com Cc: Neil Armstrong narmstrong@baylibre.com Cc: Maxime Ripard maxime.ripard@bootlin.com

One general comment below.

---

drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 4 ++++ drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c | 1 + include/drm/bridge/dw_hdmi.h | 6 ++++-- 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c index 2228689d9a5e..5cbb71a866d5 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c @@ -5,6 +5,10 @@

• Copyright (c) 2017 Renesas Solutions Corp.
• Kuninori Morimoto kuninori.morimoto.gx@renesas.com

*/

+#include <linux/dma-mapping.h> +#include <linux/module.h>

#include <drm/bridge/dw_hdmi.h>

#include <sound/hdmi-codec.h> diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c index 75490a3e0a2a..790d499daa10 100644 --- a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c +++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c @@ -7,6 +7,7 @@

• Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)

*/

+#include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/platform_device.h>

diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h index 9c56412bb2cf..9f93895dde88 100644 --- a/include/drm/bridge/dw_hdmi.h +++ b/include/drm/bridge/dw_hdmi.h @@ -10,9 +10,11 @@ #ifndef __DW_HDMI__ #define __DW_HDMI__

-#include <drm/drmP.h>

+struct drm_connector; +struct drm_display_mode; +struct drm_encoder; struct dw_hdmi; +struct platform_device;

/**

• DOC: Supported input formats and encodings

I wonder if it wouldn't be better to create common file for forward declarations. For example: include/drm/drm_forward.h which will contain only forward declarations, this way we could avoid adding these declarations in every file again and again. Since I have not seen such practice in kernel I wonder if such approach has no serious drawbacks, but for now I do not see any, except it looks like another incarnation of drmP.h :)

Quick grep shows potential candidates for forward declarations:

$ git grep -Ph '^struct drm_\S+;$' include/ drivers/gpu/ | sort | uniq -c | sort -n | tail       7 struct drm_encoder;       7 struct drm_gem_object;       8 struct drm_printer;       9 struct drm_connector;       9 struct drm_framebuffer;      13 struct drm_plane;      14 struct drm_crtc;      22 struct drm_i915_private;      23 struct drm_file;

47 struct drm_device;

Anyway:

Reviewed-by: Andrzej Hajda a.hajda@samsung.com

-- Regards Andrzej