linux-kernel - [PATCH 4.15 093/163] drm/ast: Load lut in crtc

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Date:   Wed, 21 Feb 2018 13:48:42 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Peter Rosin <peda@...nita.se>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Bill Fraser <bill.fraser@...il.com>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Dave Airlie <airlied@...hat.com>
Subject: [PATCH 4.15 093/163] drm/ast: Load lut in crtc_commit

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Daniel Vetter <daniel.vetter@...ll.ch>

commit 24b8ef699e8221d2b7f813adaab13eec053e1507 upstream.

In the past the ast driver relied upon the fbdev emulation helpers to
call ->load_lut at boot-up. But since

commit b8e2b0199cc377617dc238f5106352c06dcd3fa2
Author: Peter Rosin <peda@...ntia.se>
Date:   Tue Jul 4 12:36:57 2017 +0200

    drm/fb-helper: factor out pseudo-palette

that's cleaned up and drivers are expected to boot into a consistent
lut state. This patch fixes that.

Fixes: b8e2b0199cc3 ("drm/fb-helper: factor out pseudo-palette")
Cc: Peter Rosin <peda@...nita.se>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: <stable@...r.kernel.org> # v4.14+
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=198123
Cc: Bill Fraser <bill.fraser@...il.com>
Reported-and-Tested-by: Bill Fraser <bill.fraser@...il.com>
Signed-off-by: Daniel Vetter <daniel.vetter@...el.com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/ast/ast_mode.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -644,6 +644,7 @@ static void ast_crtc_commit(struct drm_c
 {
 	struct ast_private *ast = crtc->dev->dev_private;
 	ast_set_index_reg_mask(ast, AST_IO_SEQ_PORT, 0x1, 0xdf, 0);
+	ast_crtc_load_lut(crtc);
 }