[Intel-gfx] [PATCH 7/8] drm/mipi-dbi: Remove ->enabled

[Emil Velikov]

Hi Daniel,

On Fri, 12 Jun 2020 at 17:01, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
>
> The atomic helpers try really hard to not lose track of things,
> duplicating enabled tracking in the driver is at best confusing.
> Double-enabling or disabling is a bug in atomic helpers.
>
> In the fb_dirty function we can just assume that the fb always exists,
> simple display pipe helpers guarantee that the crtc is only enabled
> together with the output, so we always have a primary plane around.
>
> Now in the update function we need to be a notch more careful, since
> that can also get called when the crtc is off. And we don't want to
> upload frames when that's the case, so filter that out too.
>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> Cc: Maxime Ripard <mripard at kernel.org>
> Cc: Thomas Zimmermann <tzimmermann at suse.de>
> Cc: David Airlie <airlied at linux.ie>
> Cc: Daniel Vetter <daniel at ffwll.ch>
> Cc: David Lechner <david at lechnology.com>
> ---
>  drivers/gpu/drm/drm_mipi_dbi.c | 16 ++++++----------
>  drivers/gpu/drm/tiny/ili9225.c | 12 +++---------
>  drivers/gpu/drm/tiny/st7586.c  | 11 +++--------
>  include/drm/drm_mipi_dbi.h     |  5 -----
>  4 files changed, 12 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_mipi_dbi.c b/drivers/gpu/drm/drm_mipi_dbi.c
> index fd8d672972a9..79532b9a324a 100644
> --- a/drivers/gpu/drm/drm_mipi_dbi.c
> +++ b/drivers/gpu/drm/drm_mipi_dbi.c
> @@ -268,7 +268,7 @@ static void mipi_dbi_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
>         bool full;
>         void *tr;
>
> -       if (!dbidev->enabled)
> +       if (WARN_ON(!fb))
>                 return;
>
AFAICT no other driver has such WARN_ON. Let's drop that - it is
pretty confusing and misleading as-is.

With that, patches 7/8 and 8/8 are:
Reviewed-by: Emil Velikov <emil.l.velikov at gmail.com>

-Emil