Re: [PATCH v2] drm/mgag200: Fix gamma lut not initialized.

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Hi

Am 10.05.23 um 15:10 schrieb Jocelyn Falempe:
When mgag200 switched from simple KMS to regular atomic helpers,
the initialization of the gamma settings was lost.
This leads to a black screen, if the bios/uefi doesn't use the same
pixel color depth.

v2: rebase on top of drm-misc-fixes, and add Cc stable tag.

Looks good. Please add the patch to drm-misc-fixes.

Best regards
Thomas


Link: https://bugzilla.redhat.com/show_bug.cgi?id=2171155
Fixes: 1baf9127c482 ("drm/mgag200: Replace simple-KMS with regular atomic helpers")
Cc: <stable@xxxxxxxxxxxxxxx>
Tested-by: Phil Oester <kernel@xxxxxxxxxxxx>
Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx>
---
  drivers/gpu/drm/mgag200/mgag200_mode.c | 5 +++++
  1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 0a5aaf78172a..576c4c838a33 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -640,6 +640,11 @@ void mgag200_crtc_helper_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_
  	if (funcs->pixpllc_atomic_update)
  		funcs->pixpllc_atomic_update(crtc, old_state);
+ if (crtc_state->gamma_lut)
+		mgag200_crtc_set_gamma(mdev, format, crtc_state->gamma_lut->data);
+	else
+		mgag200_crtc_set_gamma_linear(mdev, format);
+
  	mgag200_enable_display(mdev);
if (funcs->enable_vidrst)

base-commit: a26cc2934331b57b5a7164bff344f0a2ec245fc0

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

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