| /* SPDX-License-Identifier: MIT */ |
| |
| #include <types.h> |
| #include <console/console.h> |
| #include <drivers/intel/gma/i915.h> |
| |
| /* HDMI/DVI modes ignore everything but the last 2 items. So we share |
| * them for both DP and FDI transports, allowing those ports to |
| * automatically adapt to HDMI connections as well. |
| */ |
| static u32 hsw_ddi_translations_dp[] = { |
| 0x00FFFFFF, 0x0006000E, /* DP parameters */ |
| 0x00D75FFF, 0x0005000A, |
| 0x00C30FFF, 0x00040006, |
| 0x80AAAFFF, 0x000B0000, |
| 0x00FFFFFF, 0x0005000A, |
| 0x00D75FFF, 0x000C0004, |
| 0x80C30FFF, 0x000B0000, |
| 0x00FFFFFF, 0x00040006, |
| 0x80D75FFF, 0x000B0000, |
| 0x00FFFFFF, 0x00040006 /* HDMI parameters */ |
| }; |
| |
| static u32 hsw_ddi_translations_fdi[] = { |
| 0x00FFFFFF, 0x0007000E, /* FDI parameters */ |
| 0x00D75FFF, 0x000F000A, |
| 0x00C30FFF, 0x00060006, |
| 0x00AAAFFF, 0x001E0000, |
| 0x00FFFFFF, 0x000F000A, |
| 0x00D75FFF, 0x00160004, |
| 0x00C30FFF, 0x001E0000, |
| 0x00FFFFFF, 0x00060006, |
| 0x00D75FFF, 0x001E0000, |
| 0x00FFFFFF, 0x00040006 /* HDMI parameters */ |
| }; |
| |
| /* On Haswell, DDI port buffers must be programmed with correct values |
| * in advance. The buffer values are different for FDI and DP modes, |
| * but the HDMI/DVI fields are shared among those. So we program the DDI |
| * in either FDI or DP modes only, as HDMI connections will work with both |
| * of those. |
| */ |
| static void intel_prepare_ddi_buffers(int port, int use_fdi_mode) |
| { |
| u32 reg; |
| int i; |
| u32 *ddi_translations = ((use_fdi_mode) ? |
| hsw_ddi_translations_fdi : |
| hsw_ddi_translations_dp); |
| |
| printk(BIOS_SPEW, "Initializing DDI buffers for port %d in %s mode\n", |
| port, |
| use_fdi_mode ? "FDI" : "DP"); |
| |
| for (i=0,reg=DDI_BUF_TRANS(port);i < ARRAY_SIZE(hsw_ddi_translations_fdi);i++) { |
| gtt_write(reg,ddi_translations[i]); |
| reg += 4; |
| } |
| } |
| |
| void intel_prepare_ddi(void) |
| { |
| int port; |
| u32 use_fdi = 1; |
| |
| for (port = PORT_A; port < PORT_E; port++) |
| intel_prepare_ddi_buffers(port, !use_fdi); |
| |
| intel_prepare_ddi_buffers(PORT_E, use_fdi); |
| } |