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drm/bochs: Use helpers for struct drm_edid

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Implement a read function for struct drm_edid and read the EDID data
with drm_edit_read_custom(). Update the connector data accordingly.

The EDID data comes from the emulator itself and the connector stores
a copy in its EDID property. The drm_edid field in struct bochs_device
is therefore not required. Remove it.

If qemu provides no EDID data, install default display modes as before.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240902105546.792625-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2024-09-02 12:53:40 +02:00
parent c5c4c8fba0
commit 759ef92532
1 changed files with 22 additions and 26 deletions
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48
drivers/gpu/drm/tiny/bochs.c
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@ -85,7 +85,6 @@ struct bochs_device {
u16 yres_virtual;
u32 stride;
u32 bpp;
const struct drm_edid *drm_edid;
/* drm */
struct drm_device *dev;
@ -172,12 +171,14 @@ static void bochs_hw_set_little_endian(struct bochs_device *bochs)
#define bochs_hw_set_native_endian(_b) bochs_hw_set_little_endian(_b)
#endif
static int bochs_get_edid_block(void *data, u8 *buf,
unsigned int block, size_t len)
static int bochs_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
{
struct bochs_device *bochs = data;
size_t i, start = block * EDID_LENGTH;
if (!bochs->mmio)
return -1;
if (start + len > 0x400 /* vga register offset */)
return -1;
@ -187,25 +188,20 @@ static int bochs_get_edid_block(void *data, u8 *buf,
return 0;
}
static int bochs_hw_load_edid(struct bochs_device *bochs)
static const struct drm_edid *bochs_hw_read_edid(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct bochs_device *bochs = dev->dev_private;
u8 header[8];
if (!bochs->mmio)
return -1;
/* check header to detect whenever edid support is enabled in qemu */
bochs_get_edid_block(bochs, header, 0, ARRAY_SIZE(header));
if (drm_edid_header_is_valid(header) != 8)
return -1;
return NULL;
drm_edid_free(bochs->drm_edid);
bochs->drm_edid = drm_edid_read_custom(&bochs->connector,
bochs_get_edid_block, bochs);
if (!bochs->drm_edid)
return -1;
drm_dbg(dev, "Found EDID data blob.\n");
return 0;
return drm_edid_read_custom(connector, bochs_get_edid_block, bochs);
}
static int bochs_hw_init(struct drm_device *dev)
@ -303,7 +299,6 @@ static void bochs_hw_fini(struct drm_device *dev)
if (bochs->fb_map)
iounmap(bochs->fb_map);
pci_release_regions(to_pci_dev(dev->dev));
drm_edid_free(bochs->drm_edid);
}
static void bochs_hw_blank(struct bochs_device *bochs, bool blank)
@ -469,21 +464,28 @@ static const struct drm_simple_display_pipe_funcs bochs_pipe_funcs = {
.cleanup_fb = drm_gem_vram_simple_display_pipe_cleanup_fb,
};
static int bochs_connector_get_modes(struct drm_connector *connector)
static int bochs_connector_helper_get_modes(struct drm_connector *connector)
{
const struct drm_edid *edid;
int count;
count = drm_edid_connector_add_modes(connector);
edid = bochs_hw_read_edid(connector);
if (!count) {
if (edid) {
drm_edid_connector_update(connector, edid);
count = drm_edid_connector_add_modes(connector);
drm_edid_free(edid);
} else {
drm_edid_connector_update(connector, NULL);
count = drm_add_modes_noedid(connector, 8192, 8192);
drm_set_preferred_mode(connector, defx, defy);
}
return count;
}
static const struct drm_connector_helper_funcs bochs_connector_connector_helper_funcs = {
.get_modes = bochs_connector_get_modes,
.get_modes = bochs_connector_helper_get_modes,
};
static const struct drm_connector_funcs bochs_connector_connector_funcs = {
@ -501,14 +503,8 @@ static void bochs_connector_init(struct drm_device *dev)
drm_connector_init(dev, connector, &bochs_connector_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL);
drm_connector_attach_edid_property(connector);
drm_connector_helper_add(connector, &bochs_connector_connector_helper_funcs);
bochs_hw_load_edid(bochs);
if (bochs->drm_edid) {
DRM_INFO("Found EDID data blob.\n");
drm_connector_attach_edid_property(connector);
drm_edid_connector_update(&bochs->connector, bochs->drm_edid);
}
}
static const struct drm_mode_config_funcs bochs_mode_funcs = {