diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2019-12-06 11:59:52 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2019-12-06 15:51:52 +0300 |
| commit | cd45e30a7099e5fcbc25fcfa035fa604255afdee (patch) | |
| tree | 51db71b4a34cc6fed8b0f8769ee0970a7d62865d /drivers/gpu/drm/udl | |
| parent | ffc90486e320ba68f63de39fe04d757ce0cf49e5 (diff) | |
| download | linux-cd45e30a7099e5fcbc25fcfa035fa604255afdee.tar.xz | |
drm/udl: Move log-cpp code out of udl_damage_handler()
Computing the cpp value's logarithm in a separate helper function makes
the damage-handler code more readable.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191206085954.9697-6-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/udl')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_fb.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c index cc2a09a995b8..482786eeea6c 100644 --- a/drivers/gpu/drm/udl/udl_fb.c +++ b/drivers/gpu/drm/udl/udl_fb.c @@ -58,6 +58,13 @@ static uint16_t rgb16(uint32_t col) } #endif +static long udl_log_cpp(unsigned int cpp) +{ + if (WARN_ON(!is_power_of_2(cpp))) + return -EINVAL; + return __ffs(cpp); +} + static int udl_aligned_damage_clip(struct drm_rect *clip, int x, int y, int width, int height) { @@ -92,11 +99,6 @@ int udl_handle_damage(struct drm_framebuffer *fb, int x, int y, int log_bpp; void *vaddr; - if (WARN_ON(!is_power_of_2(fb->format->cpp[0]))) - return -EINVAL; - - log_bpp = __ffs(fb->format->cpp[0]); - spin_lock(&udl->active_fb_16_lock); if (udl->active_fb_16 != fb) { spin_unlock(&udl->active_fb_16_lock); @@ -104,6 +106,11 @@ int udl_handle_damage(struct drm_framebuffer *fb, int x, int y, } spin_unlock(&udl->active_fb_16_lock); + ret = udl_log_cpp(fb->format->cpp[0]); + if (ret < 0) + return ret; + log_bpp = ret; + ret = udl_aligned_damage_clip(&clip, x, y, width, height); if (ret) return ret; |