drivers/intel/gma: Use libgfxinit Update_Output to turn off graphics

We were using the libgfxinit `Initialize' function with the
`Clean_State' parameter because the more appropriate `Update_Output'
function was not performing all the necessary clean up operations for
the PEIM driver to be successful when libgfxinit was used in romstage.

Thanks to a lot of experiments and some log analysis efforts, we were
able to identify the missing operation and fix the `Update_Output'
function (cf. https://review.coreboot.org/c/libgfxinit/+/72123).

The `initialized' global variable is now unnecessary as we track the
initialization in the Ada code instead.

Since the `Update_Output' function does not return any value, this
patch modifies the `gma_gfxstop' prototype accordingly. This does not
have any impact as the return value was not used anyway.

BUG=b:264526798
BRANCH=firmware-brya-14505.B
TEST=Developer screen is visible

Change-Id: I53d6fadf65dc09bd984de96edb4c1f15b64aeed0
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72125
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/drivers/intel/gma/libgfxinit.h b/src/drivers/intel/gma/libgfxinit.h
index 3270b91752..24079c31ff 100644
--- a/src/drivers/intel/gma/libgfxinit.h
+++ b/src/drivers/intel/gma/libgfxinit.h
@@ -17,7 +17,7 @@ enum {
 };
 
 void gma_gfxinit(int *lightup_ok);
-void gma_gfxstop(int *stop_ok);
+void gma_gfxstop(void);
 int gma_read_edid(unsigned char edid[], int port);
 
 #endif