Hi Aaron,
thanks for the patch. Moving to the amd-gfx mailing list, where
xf86-video-amdgpu patches are reviewed. Comments inline below.
On 2018-09-10 1:14 p.m., Aaron Liu wrote:
> Add gamma_lut/degamma_lut/ctm checking before pushing
> staged color management properties on the CRTC.
> If above object is NULL, return directly.
>
> Signed-off-by: Aaron Liu <aaron.liu@xxxxxxx>
> ---
> src/drmmode_display.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
> diff --git a/src/drmmode_display.c b/src/drmmode_display.c
> index 68fca1b..006ae7c 100644
> --- a/src/drmmode_display.c
> +++ b/src/drmmode_display.c
> @@ -1116,6 +1116,11 @@ static int drmmode_crtc_push_cm_prop(xf86CrtcPtr crtc,
>
> switch (cm_prop_index) {
> case CM_GAMMA_LUT:
> + if (!drmmode_crtc->gamma_lut) {
> + xf86DrvMsg(crtc->scrn->scrnIndex, X_WARNING,
> + "gamma_lut is NULL!\n");
> + return BadRequest;
> + }
> /* Calculate the expected size of value in bytes */
> expected_bytes = sizeof(struct drm_color_lut) *
> drmmode->gamma_lut_size;
> @@ -1154,11 +1159,21 @@ static int drmmode_crtc_push_cm_prop(xf86CrtcPtr crtc,
> }
> break;
> case CM_DEGAMMA_LUT:
> + if (!drmmode_crtc->degamma_lut) {
> + xf86DrvMsg(crtc->scrn->scrnIndex, X_WARNING,
> + "degamma_lut is NULL!\n");
> + return BadRequest;
> + }
> expected_bytes = sizeof(struct drm_color_lut) *
> drmmode->degamma_lut_size;
> blob_data = drmmode_crtc->degamma_lut;
> break;
> case CM_CTM:
> + if (!drmmode_crtc->ctm) {
> + xf86DrvMsg(crtc->scrn->scrnIndex, X_WARNING,
> + "ctm is NULL!\n");
> + return BadRequest;
> + }
> expected_bytes = sizeof(struct drm_color_ctm);
> blob_data = drmmode_crtc->ctm;
> break;
>
(How) were you able to actually trigger this condition in practice? The
only way I could imagine is via drmmode_output_set_property, in which
case I think it would be better to guard all the *cm_* related code
there with
if (drmmode_cm_enabled(drmmode_output->drmmode)) {
...
}
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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