efifb: Support overriding fields FW tells us with the DMI data.
Some machines apparently give us bogus linelength/stride/pitch data, so we need to support letting the DMI table override the supplied data. I bet you can't guess whose machines I'm talking about. Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Peter Jones
Paul Mundt
parent
47c87d930f
commit
47dfe51f8f
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@ -68,41 +68,48 @@ enum {
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M_UNKNOWN /* placeholder */
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};
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#define OVERRIDE_NONE 0x0
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#define OVERRIDE_BASE 0x1
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#define OVERRIDE_STRIDE 0x2
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#define OVERRIDE_HEIGHT 0x4
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#define OVERRIDE_WIDTH 0x8
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static struct efifb_dmi_info {
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char *optname;
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unsigned long base;
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int stride;
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int width;
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int height;
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int flags;
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} dmi_list[] __initdata = {
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[M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900 },
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[M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050 }, /* guess */
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[M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050 },
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[M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200 }, /* guess */
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[M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200 },
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[M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080 },
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[M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440 },
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[M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768 },
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[M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768 },
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[M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200 },
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[M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800 },
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[M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800 },
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[M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800 },
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[M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800 },
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[M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800 },
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[M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900 },
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[M_MBP_2] = { "mbp2", 0, 0, 0, 0 }, /* placeholder */
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[M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900 },
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[M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900 },
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[M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200 },
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[M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900 },
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[M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200 },
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[M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900 },
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[M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200 },
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[M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050 },
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[M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800 },
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[M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900 },
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[M_UNKNOWN] = { NULL, 0, 0, 0, 0 }
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[M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
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[M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
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[M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
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[M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
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[M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
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[M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
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[M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
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[M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
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[M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
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[M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
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[M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
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[M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
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};
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static int set_system(const struct dmi_system_id *id);
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@ -157,16 +164,22 @@ static const struct dmi_system_id dmi_system_table[] __initconst = {
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{},
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};
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#define choose_value(dmivalue, fwvalue, field, flags) ({ \
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typeof(fwvalue) _ret_ = fwvalue; \
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if ((flags) & (field)) \
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_ret_ = dmivalue; \
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else if ((fwvalue) == 0) \
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_ret_ = dmivalue; \
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_ret_; \
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})
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static int set_system(const struct dmi_system_id *id)
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{
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struct efifb_dmi_info *info = id->driver_data;
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if (info->base == 0)
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return 0;
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printk(KERN_INFO "efifb: dmi detected %s - framebuffer at %p "
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"(%dx%d, stride %d)\n", id->ident,
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(void *)info->base, info->width, info->height,
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info->stride);
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if (info->base == 0 && info->height == 0 && info->width == 0
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&& info->stride == 0)
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return 0;
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/* Trust the bootloader over the DMI tables */
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if (screen_info.lfb_base == 0) {
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@ -174,40 +187,47 @@ static int set_system(const struct dmi_system_id *id)
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struct pci_dev *dev = NULL;
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int found_bar = 0;
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#endif
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screen_info.lfb_base = info->base;
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if (info->base) {
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screen_info.lfb_base = choose_value(info->base,
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screen_info.lfb_base, OVERRIDE_BASE,
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info->flags);
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#if defined(CONFIG_PCI)
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/* make sure that the address in the table is actually on a
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* VGA device's PCI BAR */
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/* make sure that the address in the table is actually
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* on a VGA device's PCI BAR */
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for_each_pci_dev(dev) {
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int i;
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if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
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continue;
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for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
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resource_size_t start, end;
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for_each_pci_dev(dev) {
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int i;
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if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
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continue;
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for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
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resource_size_t start, end;
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start = pci_resource_start(dev, i);
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if (start == 0)
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break;
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end = pci_resource_end(dev, i);
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if (screen_info.lfb_base >= start &&
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screen_info.lfb_base < end) {
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found_bar = 1;
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start = pci_resource_start(dev, i);
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if (start == 0)
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break;
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end = pci_resource_end(dev, i);
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if (screen_info.lfb_base >= start &&
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screen_info.lfb_base < end) {
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found_bar = 1;
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}
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}
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}
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}
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if (!found_bar)
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screen_info.lfb_base = 0;
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if (!found_bar)
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screen_info.lfb_base = 0;
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#endif
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}
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}
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if (screen_info.lfb_base) {
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if (screen_info.lfb_linelength == 0)
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screen_info.lfb_linelength = info->stride;
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if (screen_info.lfb_width == 0)
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screen_info.lfb_width = info->width;
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if (screen_info.lfb_height == 0)
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screen_info.lfb_height = info->height;
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screen_info.lfb_linelength = choose_value(info->stride,
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screen_info.lfb_linelength, OVERRIDE_STRIDE,
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info->flags);
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screen_info.lfb_width = choose_value(info->width,
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screen_info.lfb_width, OVERRIDE_WIDTH,
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info->flags);
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screen_info.lfb_height = choose_value(info->height,
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screen_info.lfb_height, OVERRIDE_HEIGHT,
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info->flags);
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if (screen_info.orig_video_isVGA == 0)
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screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
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} else {
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@ -217,6 +237,13 @@ static int set_system(const struct dmi_system_id *id)
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screen_info.orig_video_isVGA = 0;
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return 0;
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}
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printk(KERN_INFO "efifb: dmi detected %s - framebuffer at %p "
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"(%dx%d, stride %d)\n", id->ident,
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(void *)screen_info.lfb_base, screen_info.lfb_width,
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screen_info.lfb_height, screen_info.lfb_linelength);
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return 1;
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}
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