github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-26 16:12:59 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/i915/cx0: Add macro to get DDI port width from a register value

Browse Source 
A follow-up change will need to retrieve the DDI port field from the
register value, add a macro for this. Make things symmetric with setting
the field in the register.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://lore.kernel.org/r/20251117104602.2363671-8-mika.kahola@intel.com
This commit is contained in:
Imre Deak 2025-11-17 12:45:37 +02:00 committed by Mika Kahola
parent 7c3342213a
commit 4f8b1e08c2
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/display/intel_display_regs.h
View File

@ -2349,8 +2349,13 @@ enum skl_power_gate {
#define DDI_BUF_CTL_TC_PHY_OWNERSHIP REG_BIT(6)
#define DDI_A_4_LANES REG_BIT(4)
#define DDI_PORT_WIDTH_MASK REG_GENMASK(3, 1)
#define DDI_PORT_WIDTH_ENCODE(width) ((width) == 3 ? 4 : (width) - 1)
#define DDI_PORT_WIDTH_DECODE(regval) ((regval) == 4 ? 3 : (regval) + 1)
#define DDI_PORT_WIDTH(width) REG_FIELD_PREP(DDI_PORT_WIDTH_MASK, \
((width) == 3 ? 4 : (width) - 1))
DDI_PORT_WIDTH_ENCODE(width))
#define DDI_PORT_WIDTH_GET(regval) DDI_PORT_WIDTH_DECODE(REG_FIELD_GET(DDI_PORT_WIDTH_MASK, \
(regval)))
#define DDI_PORT_WIDTH_SHIFT 1
#define DDI_INIT_DISPLAY_DETECTED REG_BIT(0)