[PATCH 08/13] platform/apple-gmux: Add documentation about iMacs

[Atharva Tiwari <atharvatiwarilinuxdev@gmail.com>]

Add documentation about iMacs

Signed-off-by: Atharva Tiwari <atharvatiwarilinuxdev@gmail.com>
---
 drivers/platform/x86/apple-gmux.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
index dda281f2f..9f0e9ecbf 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -453,6 +453,11 @@ static const struct backlight_ops gmux_bl_ops = {
  * switch the panel and the external DP connector and allocates a framebuffer
  * for the selected GPU.
  *
+ * There is iGPU present on iMac's aswell, and we can enable it using apple-set-os.
+ * But there arent any display lines going from the iGPU to the display. iGPU is only
+ * used for offloading then, it makes sense as iMac's display are massive (4K or 5K).
+ * A integrated GPU won't be able to handle that.
+ *
  * .. _US 8,687,007 B2: https://pimg-fpiw.uspto.gov/fdd/07/870/086/0.pdf
  * .. _NXP CBTL06141:   https://www.nxp.com/documents/data_sheet/CBTL06141.pdf
  * .. _NXP CBTL06142:   https://www.nxp.com/documents/data_sheet/CBTL06141.pdf
-- 
2.55.0