[PATCH v2 00/25] drm: fb emulation: Step 1: Create new drm_fb_helper wrapper funcs

[Archit Taneja]

On 07/22/2015 01:11 PM, Daniel Vetter wrote:
> On Wed, Jul 22, 2015 at 12:29:36PM +0530, Archit Taneja wrote:
>> DRM drivers using drm_fb_helpers still call some fbdev core functions.
>> This makes the driver depend on CONFIG_FB, resulting in complicated
>> Kconfig options, and preventing us from creating a top level drm config
>> option to enable/disable FBDEV emulation.
>>
>> Create new drm_fb_helper functions that replace these fbdev functions.
>>
>> In most cases, the new helper funcs simply wrap around the original fbdev
>> functions. For a few (like framebufer_alloc), we actually do some work
>> that is currently redundant across multiple drivers.
>>
>> With these patches, the drivers don't call any fbdev functions directly.
>> They are now called through functions in drm_fb_helper.c. We will later
>> create a fbdev emulation config option to stub out the fb helpers.
>>
>> The only exception is vmwgfx driver. This doesn't use drm_fb_helper. It
>> creates a fb device how a driver in drivers/video/fbdev would. Maybe this
>> needs to be converted to use drm_fb_helpers.
>>
>> For more info, have a look at the threads:
>> http://lists.freedesktop.org/archives/dri-devel/2015-March/078729.html
>> http://lists.freedesktop.org/archives/dri-devel/2015-March/078975.html
>>
>> v2:
>> - Remove if (info) checks in fb_sys functions
>> - Use 'if (fb_helper && fb_helper->fbdev)' checks where appropriate
>> - Add kerneldocs for the new helper funcs
>> - Follow drm way of aligning of arguments in func definitions
>> - Fixed build error in drm/virtio
>> - Fixed error cleanup path in drm/tegra
>> - Fixed build error in drm/rockchip
>> - Fixed return issue in drm/amdgpu
>> - Fixed 'unused variable' warnings in bochs, ast, udl and radeon
>> - Fixed stray goto labels in cirrus, exynos, mgag
>
> When resending patches please also have changelogs per-patch, not just in
> the cover letter. Otherwise you have to constantly jump back&forth.
>
> Also I'd drop the compile tested only from patches, just adds noise.

I'll remove the 'compile tested only' line from the patches.

About the changelogs per-patch, I'll add them for the drm_fb_helper.c 
changes, and for a few drm drivers where people found flaws in the 
changes. I'm going to skip for the ones which were build error/warning 
fixes found by kbots. I didn't intend the first version to be full 
proof, just wanted people to have a look.

Thanks,
Archit

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