From: Michel Dänzer <michel.daen...@amd.com>

In that case, the display hardware applies gamma to the HW cursor.

Bugzilla: https://bugs.freedesktop.org/106578
Signed-off-by: Michel Dänzer <michel.daen...@amd.com>
---
 src/drmmode_display.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index fa0c05b0c..fc8dd7a4d 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -1515,6 +1515,12 @@ drmmode_cursor_src_offset(Rotation rotation, int width, 
int height,
 
 #endif
 
+static uint32_t
+drmmode_cursor_gamma_passthrough(xf86CrtcPtr crtc, uint32_t argb)
+{
+       return argb;
+}
+
 static uint32_t
 drmmode_cursor_gamma(xf86CrtcPtr crtc, uint32_t argb)
 {
@@ -1525,9 +1531,6 @@ drmmode_cursor_gamma(xf86CrtcPtr crtc, uint32_t argb)
        if (!alpha)
                return 0;
 
-       if (crtc->scrn->depth != 24 && crtc->scrn->depth != 32)
-               return argb;
-
        /* Un-premultiply alpha */
        for (i = 0; i < 3; i++)
                rgb[i] = ((argb >> (i * 8)) & 0xff) * 0xff / alpha;
@@ -1544,6 +1547,12 @@ static void drmmode_do_load_cursor_argb(xf86CrtcPtr 
crtc, CARD32 *image, uint32_
 {
        ScrnInfoPtr pScrn = crtc->scrn;
        AMDGPUInfoPtr info = AMDGPUPTR(pScrn);
+       uint32_t (*cursor_gamma)(xf86CrtcPtr crtc, uint32_t argb) =
+               drmmode_cursor_gamma;
+
+       if ((crtc->scrn->depth != 24 && crtc->scrn->depth != 32) ||
+           drmmode_cm_enabled(&info->drmmode))
+               cursor_gamma = drmmode_cursor_gamma_passthrough;
 
 #if XF86_CRTC_VERSION < 7
        if (crtc->driverIsPerformingTransform) {
@@ -1559,8 +1568,7 @@ static void drmmode_do_load_cursor_argb(xf86CrtcPtr crtc, 
CARD32 *image, uint32_
                                                                      dstx, 
dsty);
 
                                ptr[dsty * info->cursor_w + dstx] =
-                                       cpu_to_le32(drmmode_cursor_gamma(crtc,
-                                                                        
image[srcoffset]));
+                                       cpu_to_le32(cursor_gamma(crtc, 
image[srcoffset]));
                        }
                }
        } else
@@ -1570,7 +1578,7 @@ static void drmmode_do_load_cursor_argb(xf86CrtcPtr crtc, 
CARD32 *image, uint32_
                int i;
 
                for (i = 0; i < cursor_size; i++)
-                       ptr[i] = cpu_to_le32(drmmode_cursor_gamma(crtc, 
image[i]));
+                       ptr[i] = cpu_to_le32(cursor_gamma(crtc, image[i]));
        }
 }
 
-- 
2.18.0

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