Re: [PATCH 2/4] drm/i915: fix include order in intel_tc.*

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On Thu, 04 Jul 2019 19:43:12 +0200, Imre Deak <imre.deak@xxxxxxxxx> wrote:

On Thu, Jul 04, 2019 at 07:21:38PM +0200, Michal Wajdeczko wrote:
On Thu, 04 Jul 2019 02:06:47 +0200, Lucas De Marchi
<lucas.demarchi@xxxxxxxxx> wrote:

> Make intel_tc.h the first include so we guarantee it's self-contained.
> Sort the rest. Same principle applies for includes in the header.
>
> Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/display/intel_tc.c | 5 +++--
>  drivers/gpu/drm/i915/display/intel_tc.h | 5 +++--
>  2 files changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_tc.c
> b/drivers/gpu/drm/i915/display/intel_tc.c
> index 1a9dd32fb0a5..e6e6163c1232 100644
> --- a/drivers/gpu/drm/i915/display/intel_tc.c
> +++ b/drivers/gpu/drm/i915/display/intel_tc.c
> @@ -3,10 +3,11 @@
>   * Copyright © 2019 Intel Corporation
>   */
> +#include "intel_tc.h"
> +
> +#include "i915_drv.h"

this master header will likely include everything, so while
your .h is now self-contained, .c remains unclean

>  #include "intel_display.h"
>  #include "intel_dp_mst.h"
> -#include "i915_drv.h"
> -#include "intel_tc.h"
> static const char *tc_port_mode_name(enum tc_port_mode mode)
>  {
> diff --git a/drivers/gpu/drm/i915/display/intel_tc.h
> b/drivers/gpu/drm/i915/display/intel_tc.h
> index 0d8411d4a91d..45ae30537b78 100644
> --- a/drivers/gpu/drm/i915/display/intel_tc.h
> +++ b/drivers/gpu/drm/i915/display/intel_tc.h
> @@ -6,10 +6,11 @@
>  #ifndef __INTEL_TC_H__
>  #define __INTEL_TC_H__
> -#include <linux/types.h>
> -#include <linux/mutex.h>
>  #include "intel_drv.h"

are you sure you want this giant header to be included here?
note that it will #include almost everything (i915_drv.h too)
and may introduce hard to resolve circular dependencies

> +#include <linux/mutex.h>

we don't need mutex definitions here in current header file

> +#include <linux/types.h>
> +

so you need only above types.h and then add forward decl for:

struct intel_digital_port;

Both the mutex and intel_digital_port definitions are needed by
intel_tc_port_ref_held() in this header.

oops, sorry, didn't scroll down to see intel_tc_port_ref_held() inline.

but wait, it is used only once in intel_display_power.c so
maybe this inline can be moved to one of the .c file ?

also, maybe it's time to move struct intel_digital_port definition
out of intel_drv.h ?



>  bool intel_tc_port_connected(struct intel_digital_port *dig_port);
>  u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port);
>  int intel_tc_port_fia_max_lane_count(struct intel_digital_port
> *dig_port);
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