Hi

Am 12.07.23 um 18:10 schrieb Uwe Kleine-König:

Hello Jani,

On Wed, Jul 12, 2023 at 05:34:28PM +0300, Jani Nikula wrote:

quoted

On Wed, 12 Jul 2023, Uwe Kleine-König [off-list ref] wrote:

quoted

Hello,

while I debugged an issue in the imx-lcdc driver I was constantly
irritated about struct drm_device pointer variables being named "dev"
because with that name I usually expect a struct device pointer.

I think there is a big benefit when these are all renamed to "drm_dev".
I have no strong preference here though, so "drmdev" or "drm" are fine
for me, too. Let the bikesheding begin!

Some statistics:

$ git grep -ohE 'struct drm_device *\* *[^ (),;]*' v6.5-rc1 | sort | uniq -c | sort -n
       1 struct drm_device *adev_to_drm
       1 struct drm_device *drm_
       1 struct drm_device          *drm_dev
       1 struct drm_device        *drm_dev
       1 struct drm_device *pdev
       1 struct drm_device *rdev
       1 struct drm_device *vdev
       2 struct drm_device *dcss_drv_dev_to_drm
       2 struct drm_device **ddev
       2 struct drm_device *drm_dev_alloc
       2 struct drm_device *mock
       2 struct drm_device *p_ddev
       5 struct drm_device *device
       9 struct drm_device * dev
      25 struct drm_device *d
      95 struct drm_device *
     216 struct drm_device *ddev
     234 struct drm_device *drm_dev
     611 struct drm_device *drm
    4190 struct drm_device *dev

This series starts with renaming struct drm_crtc::dev to drm_dev. If
it's not only me and others like the result of this effort it should be
followed up by adapting the other structs and the individual usages in
the different drivers.

I think this is an unnecessary change. In drm, a dev is usually a drm
device, i.e. struct drm_device *.

Well, unless it's not. Prominently there is

	struct drm_device {
		...
		struct device *dev;
		...
	};

Jani's point is that it's only inconvenient at the first time. Everyone 
gets use to it.

Best regards
Thomas

which yields quite a few code locations using dev->dev which is
IMHO unnecessary irritating:

	$ git grep '\<dev->dev' v6.5-rc1 drivers/gpu/drm | wc -l
	1633

Also the functions that deal with both a struct device and a struct
drm_device often use "dev" for the struct device and then "ddev" for
the drm_device (see for example amdgpu_device_get_pcie_replay_count()).

quoted

If folks insist on following through with this anyway, I'm firmly in the
camp the name should be "drm" and nothing else.

Up to now positive feedback is in the majority.

Best regards
Uwe

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)