Attachment 120326 Details for Bug 93241 – ViaCRTCInit function improvement patch

ViaCRTCInit function improvement patch

0005-Made-improvements-to-ViaCRTCInit-function-inside-via.patch (text/plain), 2.33 KB, created by Kevin Brace on 2015-12-04 05:45:13 UTC

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Creator: Kevin Brace

Created: 2015-12-04 05:45:13 UTC

Size: 2.33 KB

patch

obsolete

>From 4636cc0861656ee8c6e44f474f326b994bc2542e Mon Sep 17 00:00:00 2001
>From: Kevin Brace <kevinbrace@gmx.com>
>Date: Sun, 29 Nov 2015 06:57:06 -0800
>Subject: [PATCH 05/10] Made improvements to ViaCRTCInit function inside
> via_display.c. In particular, VIA Technologies
> graphics extended graphics feature is now activated
> in ViaCRTCInit function.
>
>---
> src/via_display.c |   31 ++++++++++++++++++++++++++-----
> 1 file changed, 26 insertions(+), 5 deletions(-)
>
>diff --git a/src/via_display.c b/src/via_display.c
>index 33198ae..1997072 100644
>--- a/src/via_display.c
>+++ b/src/via_display.c
>@@ -259,15 +259,37 @@ void ViaGammaDisable(ScrnInfoPtr pScrn)
> 
> }
> 
>-void
>-ViaCRTCInit(ScrnInfoPtr pScrn)
>+void ViaCRTCInit(ScrnInfoPtr pScrn)
> {
>     vgaHWPtr hwp = VGAHWPTR(pScrn);
> 
>-    hwp->writeSeq(hwp, 0x10, 0x01); /* unlock extended registers */
>-    ViaCrtcMask(hwp, 0x47, 0x00, 0x01); /* unlock CRT registers */
>+    DEBUG(xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Entered ViaCRTCInit.\n"));
>+
>+/* Sequencer Extended Registers */
>+/* Extended Register Unlock (0x3c5.0x10[0]) */
>+/* Set Extended Register Unlock register bit [0] to 1 in order to */
>+/* enable access to VIA Technologies graphics extended graphics */
>+/* features. */
>+    ViaSeqMask(hwp, 0x10, 0x01, 0x01);
>+
>+/* Sequencer Extended Registers */
>+/* Display Mode Control - Extended Display Mode Enable (0x3c5.0x15[1]) */
>+/* Set Extended Display Mode Enable bit to 1 in order to */
>+/* activate VIA Technologies graphics extended display mode. */
>+    ViaSeqMask(hwp, 0x15, 0x02, 0x02);
>+
>+/* CRT Controller Extended Registers */
>+/* Test Mode Control 2 - LCD Simultaneous Mode Backdoor Register for */
>+/* Clock Select and CRTC Register Protect (0x3X5.0x47[1]). */
>+/* Set LCD Simultaneous Mode Backdoor Register for Clock Select and */
>+/* CRTC Register Protect bit to 0 in order to enable access to clock */
>+/* select and CRTC registers. */
>+    ViaCrtcMask(hwp, 0x47, 0x00, 0x01);
>+
>     ViaCRTCSetGraphicsRegisters(pScrn);
>     ViaCRTCSetAttributeRegisters(pScrn);
>+
>+    DEBUG(xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Exiting ViaCRTCInit.\n"));
> }
> 
> void
>@@ -307,7 +329,6 @@ ViaFirstCRTCSetMode(ScrnInfoPtr pScrn, DisplayModePtr mode)
>     hwp->writeSeq(hwp, 0x03, 0x00);
>     hwp->writeSeq(hwp, 0x04, 0x0E);
> 
>-    ViaSeqMask(hwp, 0x15, 0x02, 0x02);
> 
>     /* bpp */
>     switch (pScrn->bitsPerPixel) {
>-- 
>1.7.9.5
>

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