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gxt4500: Make usable on x86 and fix some bugs

PATCH RESEND Superseded Ondrej Zary 1 participant 6 messages Aug 24, 2015 Framebuffer layer

v1 of 2 Superseded Latest is v2 →

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Ondrej Zary

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#0 lore raw

cover gxt4500: Make usable on x86 and fix some bugs

Fire GL2 AGP has GXT6000P and is a x86 card but the gxt4500 driver is currently limited to PPC.

This patch series makes the driver work on x86 and fixes some color problems.

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Ondrej Zary
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#1 lore raw

PATCH RESEND 1/5 gxt4500: enable on non-PPC architectures

These chips can be present at least on x86 too - Fire GL2 AGP has GXT6000P but this driver is currently limited to PPC.
Enable it for all architectures and add chip configuration for little-endian.

Tested on x86 with Fire GL2 AGP.

Signed-off-by Ondrej Zary <[email protected]>
---
 drivers/video/fbdev/Kconfig   |    5 +++--
 drivers/video/fbdev/gxt4500.c |    7 +++++++
 2 files changed, 10 insertions(+), 2 deletions(-)
drivers/video/fbdev/Kconfig +3 -2
index 2d98de5..78335bd 100644
@@ -2132,7 +2132,7 @@ config FB_UDL
 
 config FB_IBM_GXT4500
 	tristate "Framebuffer support for IBM GXT4000P/4500P/6000P/6500P adaptors"
-	depends on FB && PPC
+	depends on FB
 	select FB_CFB_FILLRECT
 	select FB_CFB_COPYAREA
 	select FB_CFB_IMAGEBLIT

@@ -2140,7 +2140,8 @@ config FB_IBM_GXT4500
 	  Say Y here to enable support for the IBM GXT4000P/6000P and
 	  GXT4500P/6500P display adaptor based on Raster Engine RC1000,
 	  found on some IBM System P (pSeries) machines. This driver
-	  doesn't use Geometry Engine GT1000.
+	  doesn't use Geometry Engine GT1000. This driver also supports
+	  AGP Fire GL2/3/4 cards on x86.
 
 config FB_PS3
 	tristate "PS3 GPU framebuffer driver"
drivers/video/fbdev/gxt4500.c +7 -0
index 135d78a..1bf9894 100644
@@ -670,8 +670,15 @@ static int gxt4500_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	pci_set_drvdata(pdev, info);
 
+#ifdef __BIG_ENDIAN
 	/* Set byte-swapping for DFA aperture for all pixel sizes */
 	pci_write_config_dword(pdev, CFG_ENDIAN0, 0x333300);
+#else /* __LITTLE_ENDIAN */
+	/* not sure what this means but fgl23 driver does that */
+	pci_write_config_dword(pdev, CFG_ENDIAN0, 0x2300);
+/*	pci_write_config_dword(pdev, CFG_ENDIAN0 + 4, 0x400000);*/
+	pci_write_config_dword(pdev, CFG_ENDIAN0 + 8, 0x98530000);
+#endif
 
 	info->fbops = &gxt4500_ops;
 	info->flags = FBINFO_FLAG_DEFAULT;
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Ondrej Zary
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#2 lore raw

PATCH RESEND 2/5 gxt4500: fix 16bpp 565 mode

In reply to Ondrej Zary

Fix wrong colors in 16bpp 565 mode.

Signed-off-by Ondrej Zary <[email protected]>
---
 drivers/video/fbdev/gxt4500.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/video/fbdev/gxt4500.c +1 -1
index 1bf9894..1f2fd5b 100644
@@ -525,7 +525,7 @@ static int gxt4500_setcolreg(unsigned int reg, unsigned int red,
 		u32 val = reg;
 		switch (par->pixfmt) {
 		case DFA_PIX_16BIT_565:
-			val |= (reg << 11) | (reg << 6);
+			val |= (reg << 11) | (reg << 5);
 			break;
 		case DFA_PIX_16BIT_1555:
 			val |= (reg << 10) | (reg << 5);
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Ondrej Zary
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#3 lore raw

PATCH RESEND 3/5 gxt4500: fix color order

In reply to Ondrej Zary

The color order in truecolor modes is wrong. This does not affect console but is visible e.g. in X11 which has wrong colors.

Swap blue and red colors to fix the problem.
Fixes https://forums.gentoo.org/viewtopic-t-692740-start-0.html

Signed-off-by Ondrej Zary <[email protected]>
---
 drivers/video/fbdev/gxt4500.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
drivers/video/fbdev/gxt4500.c +4 -3
index 1f2fd5b..442b07c 100644
@@ -347,11 +347,12 @@ static void gxt4500_unpack_pixfmt(struct fb_var_screeninfo *var,
 		break;
 	}
 	if (pixfmt != DFA_PIX_8BIT) {
-		var->green.offset = var->red.length;
-		var->blue.offset = var->green.offset + var->green.length;
+		var->blue.offset = 0;
+		var->green.offset = var->blue.length;
+		var->red.offset = var->green.offset + var->green.length;
 		if (var->transp.length)
 			var->transp.offset -				var->blue.offset + var->blue.length;
+				var->red.offset + var->red.length;
 	}
 }
 
--

Ondrej Zary

author
#4 lore raw

PATCH RESEND 4/5 gxt4500: Use write-combining for framebuffer

In reply to Ondrej Zary

Use write-combining for framebuffer to greatly improve performance on x86.

Signed-off-by Ondrej Zary <[email protected]>
---
 drivers/video/fbdev/gxt4500.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
drivers/video/fbdev/gxt4500.c +6 -2
index 442b07c..e0d1550 100644
@@ -142,7 +142,7 @@ static const unsigned char watfmt[] = {
 
 struct gxt4500_par {
 	void __iomem *regs;
-
+	int wc_cookie;
 	int pixfmt;		/* pixel format, see DFA_PIX_* values */
 
 	/* PLL parameters */

@@ -663,7 +663,7 @@ static int gxt4500_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	info->fix.smem_start = fb_phys;
 	info->fix.smem_len = pci_resource_len(pdev, 1);
-	info->screen_base = pci_ioremap_bar(pdev, 1);
+	info->screen_base = ioremap_wc(fb_phys, info->fix.smem_len);
 	if (!info->screen_base) {
 		dev_err(&pdev->dev, "gxt4500: cannot map framebuffer\n");
 		goto err_unmap_regs;

@@ -671,6 +671,9 @@ static int gxt4500_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	pci_set_drvdata(pdev, info);
 
+	par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
+					  info->fix.smem_len);
+
 #ifdef __BIG_ENDIAN
 	/* Set byte-swapping for DFA aperture for all pixel sizes */
 	pci_write_config_dword(pdev, CFG_ENDIAN0, 0x333300);

@@ -735,6 +738,7 @@ static void gxt4500_remove(struct pci_dev *pdev)
 		return;
 	par = info->par;
 	unregister_framebuffer(info);
+	arch_phys_wc_del(par->wc_cookie);
 	fb_dealloc_cmap(&info->cmap);
 	iounmap(par->regs);
 	iounmap(info->screen_base);
Signature · 1 line
Ondrej Zary
author
#5 lore raw

PATCH RESEND 5/5 gxt4500: enable panning

In reply to Ondrej Zary

The driver implements pan_display but the corresponding flags are not set.

Add FBINFO_HWACCEL_XPAN and FBINFO_HWACCEL_YPAN to flags to allow HW accelerated panning (for fast scrolling).

Signed-off-by Ondrej Zary <[email protected]>
---
 drivers/video/fbdev/gxt4500.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
drivers/video/fbdev/gxt4500.c +2 -1
index e0d1550..88a3cf6 100644
@@ -685,7 +685,8 @@ static int gxt4500_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 #endif
 
 	info->fbops = &gxt4500_ops;
-	info->flags = FBINFO_FLAG_DEFAULT;
+	info->flags = FBINFO_FLAG_DEFAULT | FBINFO_HWACCEL_XPAN |
+					    FBINFO_HWACCEL_YPAN;
 
 	err = fb_alloc_cmap(&info->cmap, 256, 0);
 	if (err) {
Signature · 1 line
Ondrej Zary