From 01ab2d14be086bd6fda82eaad000a34e6abb9047 Mon Sep 17 00:00:00 2001 From: "Ronald G. Minnich" Date: Sun, 30 Jun 2013 20:30:58 -0700 Subject: [PATCH] Add kernel-derived support functions for DDI. Newer mainboards that use haswell -- and, presumably, chipsets to come -- need some support functions. Add them in the drivers/intel/gma directory. Currently, this is one file: intel_ddi.c, but more may come. Compilation of this file is controlled by INTEL_DDI, defined in the Kconfig as default n and used in the Makefile.inc Change-Id: I501ee291c0d4589925ed3e478f67106337fcad31 Signed-off-by: Ronald G. Minnich Reviewed-on: https://gerrit.chromium.org/gerrit/60612 Tested-by: Ronald G. Minnich Reviewed-by: Ronald G. Minnich Commit-Queue: Ronald G. Minnich Reviewed-on: http://review.coreboot.org/4337 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc --- src/drivers/intel/gma/Kconfig | 6 ++ src/drivers/intel/gma/Makefile.inc | 1 + src/drivers/intel/gma/intel_ddi.c | 107 +++++++++++++++++++++++++++++ 3 files changed, 114 insertions(+) create mode 100644 src/drivers/intel/gma/intel_ddi.c diff --git a/src/drivers/intel/gma/Kconfig b/src/drivers/intel/gma/Kconfig index 1a4212bd49..073f70819b 100644 --- a/src/drivers/intel/gma/Kconfig +++ b/src/drivers/intel/gma/Kconfig @@ -22,3 +22,9 @@ config INTEL_DP default n help helper functions for intel display port operations + +config INTEL_DDI + bool + default n + help + helper functions for intel DDI operations diff --git a/src/drivers/intel/gma/Makefile.inc b/src/drivers/intel/gma/Makefile.inc index c90daa4f37..0c3f45a17e 100644 --- a/src/drivers/intel/gma/Makefile.inc +++ b/src/drivers/intel/gma/Makefile.inc @@ -18,4 +18,5 @@ ## ramstage-$(CONFIG_INTEL_DP) += intel_dp.c drm_dp_helper.c +ramstage-$(CONFIG_INTEL_DDI) += intel_ddi.c diff --git a/src/drivers/intel/gma/intel_ddi.c b/src/drivers/intel/gma/intel_ddi.c new file mode 100644 index 0000000000..659d73ca04 --- /dev/null +++ b/src/drivers/intel/gma/intel_ddi.c @@ -0,0 +1,107 @@ +/* + * Copyright 2013 Google Inc. + * Copyright © 2012 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + * Authors: + * Eugeni Dodonov + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +/* 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. + */ +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++) { + io_i915_write32(ddi_translations[i], reg); + reg += 4; + } +} +