Re: [PATCH] drm/i915: Set legacy properties when using legacy gamma set IOCTL. (v2)

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

Op 18-04-16 om 18:47 schreef Bob Paauwe:
> The i915 driver is now using atomic properties and atomic commit
> to handle the legacy set gamma IOCTL. However, if the driver is
> configured without atomic (nuclear_pageflip = false), it won't
> update the legacy properties for degamma_lut, gamma_lut and ctm
> leaving them out of sync with the atomic version of the properties.
>
> Until the driver is full atomic, make sure we update the non-atomic
> version of the properties.
>
> v2: Update the comment with a FIXME.  (Daniel)
>
> igt-testcase: kms_pipe_color / legacy-gamma-reset-pipeX
> Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Signed-off-by: Bob Paauwe <bob.j.paauwe@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 39 +++++++++++++++++++++++++++++++++++-
>  1 file changed, 38 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 5155efb6..a97bbff 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -13885,8 +13885,45 @@ out:
>  
>  #undef for_each_intel_crtc_masked
>  
> +/*
> + * FIXME: Remove this once i915 is fully DRIVER_ATOMIC by calling
> + *        drm_atomic_helper_legacy_gamma_set() directly.
> + */
> +static void intel_atomic_legacy_gamma_set(struct drm_crtc *crtc,
> +					  u16 *red, u16 *green, u16 *blue,
> +					  uint32_t start, uint32_t size)
> +{
> +	struct drm_device *dev = crtc->dev;
> +	struct drm_mode_config *config = &dev->mode_config;
> +	struct drm_crtc_state *state;
> +
> +	drm_atomic_helper_legacy_gamma_set(crtc, red, green, blue, start, size);
>
On a side note, the gamma_set function pointer should really be an int, because it may fail with -EINTR.

~Maarten
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