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drm/ofdrm: Add per-model device function

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Add a per-model device-function structure in preparation of adding
color-management support. Detection of the individual models has been
taken from fbdev's offb.

v3:
	* define constants for PCI ids (Javier)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221011150712.3928-4-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2022-10-11 17:07:10 +02:00
parent 4113744354
commit f496834e16
1 changed files with 125 additions and 0 deletions
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125
drivers/gpu/drm/tiny/ofdrm.c
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@ -28,6 +28,21 @@
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
#define PCI_VENDOR_ID_ATI_R520 0x7100
#define PCI_VENDOR_ID_ATI_R600 0x9400
enum ofdrm_model {
OFDRM_MODEL_UNKNOWN,
OFDRM_MODEL_MACH64, /* ATI Mach64 */
OFDRM_MODEL_RAGE128, /* ATI Rage128 */
OFDRM_MODEL_RAGE_M3A, /* ATI Rage Mobility M3 Head A */
OFDRM_MODEL_RAGE_M3B, /* ATI Rage Mobility M3 Head B */
OFDRM_MODEL_RADEON, /* ATI Radeon */
OFDRM_MODEL_GXT2000, /* IBM GXT2000 */
OFDRM_MODEL_AVIVO, /* ATI R5xx */
OFDRM_MODEL_QEMU, /* QEMU VGA */
};
/*
* Helpers for display nodes
*/
@ -148,14 +163,63 @@ static u64 display_get_address_of(struct drm_device *dev, struct device_node *of
return address;
}
static bool is_avivo(__be32 vendor, __be32 device)
{
/* This will match most R5xx */
return (vendor == PCI_VENDOR_ID_ATI) &&
((device >= PCI_VENDOR_ID_ATI_R520 && device < 0x7800) ||
(PCI_VENDOR_ID_ATI_R600 >= 0x9400));
}
static enum ofdrm_model display_get_model_of(struct drm_device *dev, struct device_node *of_node)
{
enum ofdrm_model model = OFDRM_MODEL_UNKNOWN;
if (of_node_name_prefix(of_node, "ATY,Rage128")) {
model = OFDRM_MODEL_RAGE128;
} else if (of_node_name_prefix(of_node, "ATY,RageM3pA") ||
of_node_name_prefix(of_node, "ATY,RageM3p12A")) {
model = OFDRM_MODEL_RAGE_M3A;
} else if (of_node_name_prefix(of_node, "ATY,RageM3pB")) {
model = OFDRM_MODEL_RAGE_M3B;
} else if (of_node_name_prefix(of_node, "ATY,Rage6")) {
model = OFDRM_MODEL_RADEON;
} else if (of_node_name_prefix(of_node, "ATY,")) {
return OFDRM_MODEL_MACH64;
} else if (of_device_is_compatible(of_node, "pci1014,b7") ||
of_device_is_compatible(of_node, "pci1014,21c")) {
model = OFDRM_MODEL_GXT2000;
} else if (of_node_name_prefix(of_node, "vga,Display-")) {
struct device_node *of_parent;
const __be32 *vendor_p, *device_p;
/* Look for AVIVO initialized by SLOF */
of_parent = of_get_parent(of_node);
vendor_p = of_get_property(of_parent, "vendor-id", NULL);
device_p = of_get_property(of_parent, "device-id", NULL);
if (vendor_p && device_p && is_avivo(*vendor_p, *device_p))
model = OFDRM_MODEL_AVIVO;
of_node_put(of_parent);
} else if (of_device_is_compatible(of_node, "qemu,std-vga")) {
model = OFDRM_MODEL_QEMU;
}
return model;
}
/*
* Open Firmware display device
*/
struct ofdrm_device_funcs {
};
struct ofdrm_device {
struct drm_device dev;
struct platform_device *pdev;
const struct ofdrm_device_funcs *funcs;
/* firmware-buffer settings */
struct iosys_map screen_base;
struct drm_display_mode mode;
@ -522,6 +586,33 @@ static const struct drm_mode_config_funcs ofdrm_mode_config_funcs = {
* Init / Cleanup
*/
static const struct ofdrm_device_funcs ofdrm_unknown_device_funcs = {
};
static const struct ofdrm_device_funcs ofdrm_mach64_device_funcs = {
};
static const struct ofdrm_device_funcs ofdrm_rage128_device_funcs = {
};
static const struct ofdrm_device_funcs ofdrm_rage_m3a_device_funcs = {
};
static const struct ofdrm_device_funcs ofdrm_rage_m3b_device_funcs = {
};
static const struct ofdrm_device_funcs ofdrm_radeon_device_funcs = {
};
static const struct ofdrm_device_funcs ofdrm_gxt2000_device_funcs = {
};
static const struct ofdrm_device_funcs ofdrm_avivo_device_funcs = {
};
static const struct ofdrm_device_funcs ofdrm_qemu_device_funcs = {
};
static struct drm_display_mode ofdrm_mode(unsigned int width, unsigned int height)
{
/*
@ -543,6 +634,7 @@ static struct ofdrm_device *ofdrm_device_create(struct drm_driver *drv,
struct device_node *of_node = pdev->dev.of_node;
struct ofdrm_device *odev;
struct drm_device *dev;
enum ofdrm_model model;
int width, height, depth, linebytes;
const struct drm_format_info *format;
u64 address;
@ -571,6 +663,39 @@ static struct ofdrm_device *ofdrm_device_create(struct drm_driver *drv,
* OF display-node settings
*/
model = display_get_model_of(dev, of_node);
drm_dbg(dev, "detected model %d\n", model);
switch (model) {
case OFDRM_MODEL_UNKNOWN:
odev->funcs = &ofdrm_unknown_device_funcs;
break;
case OFDRM_MODEL_MACH64:
odev->funcs = &ofdrm_mach64_device_funcs;
break;
case OFDRM_MODEL_RAGE128:
odev->funcs = &ofdrm_rage128_device_funcs;
break;
case OFDRM_MODEL_RAGE_M3A:
odev->funcs = &ofdrm_rage_m3a_device_funcs;
break;
case OFDRM_MODEL_RAGE_M3B:
odev->funcs = &ofdrm_rage_m3b_device_funcs;
break;
case OFDRM_MODEL_RADEON:
odev->funcs = &ofdrm_radeon_device_funcs;
break;
case OFDRM_MODEL_GXT2000:
odev->funcs = &ofdrm_gxt2000_device_funcs;
break;
case OFDRM_MODEL_AVIVO:
odev->funcs = &ofdrm_avivo_device_funcs;
break;
case OFDRM_MODEL_QEMU:
odev->funcs = &ofdrm_qemu_device_funcs;
break;
}
width = display_get_width_of(dev, of_node);
if (width < 0)
return ERR_PTR(width);