[SRU][N][PATCH 06/11] drm/ast: Remove gamma LUT updates from DPMS code

[Aaron Ma]

From: Thomas Zimmermann <tzimmermann at suse.de>

BugLink: https://bugs.launchpad.net/bugs/2083022

The DPMS code, called from the CRTC's atomic_enable, rewrites the
gamma LUT. This is already done by the CRTC's atomic_flush. Remove
the duplication.

v2:
- fix a typo in commit message

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe at redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240627153638.8765-6-tzimmermann@suse.de
(cherry picked from commit bb5367d17e83af95b56d2cc455a09316d6ff3349)
Signed-off-by: Aaron Ma <aaron.ma at canonical.com>
---
 drivers/gpu/drm/ast/ast_mode.c | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index ace24b32a90b3..193fbffd5ec98 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -1004,8 +1004,6 @@ static void ast_crtc_dpms(struct drm_crtc *crtc, int mode)
 {
 	struct ast_device *ast = to_ast_device(crtc->dev);
 	u8 ch = AST_DPMS_VSYNC_OFF | AST_DPMS_HSYNC_OFF;
-	struct ast_crtc_state *ast_state;
-	const struct drm_format_info *format;
 
 	/* TODO: Maybe control display signal generation with
 	 *       Sync Enable (bit CR17.7).
@@ -1014,16 +1012,6 @@ static void ast_crtc_dpms(struct drm_crtc *crtc, int mode)
 	case DRM_MODE_DPMS_ON:
 		ast_set_index_reg_mask(ast, AST_IO_VGASRI,  0x01, 0xdf, 0);
 		ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb6, 0xfc, 0);
-
-		ast_state = to_ast_crtc_state(crtc->state);
-		format = ast_state->format;
-
-		if (format) {
-			if (crtc->state->gamma_lut)
-				ast_crtc_set_gamma(ast, format, crtc->state->gamma_lut->data);
-			else
-				ast_crtc_set_gamma_linear(ast, format);
-		}
 		break;
 	case DRM_MODE_DPMS_STANDBY:
 	case DRM_MODE_DPMS_SUSPEND:
-- 
2.34.1