diff options
Diffstat (limited to 'src/drivers/intel/gma/display.c')
| -rw-r--r-- | src/drivers/intel/gma/display.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/drivers/intel/gma/display.c b/src/drivers/intel/gma/display.c new file mode 100644 index 0000000000..5c8e886469 --- /dev/null +++ b/src/drivers/intel/gma/display.c @@ -0,0 +1,118 @@ +/* + * Copyright 2013 Google Inc. + * + * 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: + * Keith Packard <keithp@keithp.com> + * + */ + +/* This code was created by the coccinnelle filters in the i915tool, + * with some final hand filtering. + */ + +#include <console/console.h> +#include <stdint.h> +#include <delay.h> +#include <drivers/intel/gma/i915.h> +#include <string.h> + +void compute_display_params(struct intel_dp *dp) +{ + struct edid *edid = &(dp->edid); + + /* step 1: get the constants in the dp struct set up. */ + dp->lane_count = dp->dpcd[DP_MAX_LANE_COUNT]&DP_LANE_COUNT_MASK; + + dp->link_bw = dp->dpcd[DP_MAX_LINK_RATE]; + dp->clock = intel_dp_bw_code_to_link_rate(dp->link_bw); + dp->edid.link_clock = intel_dp_bw_code_to_link_rate(dp->link_bw); + + /* step 2. Do some computation of other stuff. */ + dp->bytes_per_pixel = dp->pipe_bits_per_pixel/8; + + dp->stride = edid->bytes_per_line; + + dp->htotal = (edid->ha - 1) | ((edid->ha + edid->hbl - 1) << 16); + + dp->hblank = (edid->ha - 1) | ((edid->ha + edid->hbl - 1) << 16); + + dp->hsync = (edid->ha + edid->hso - 1) | + ((edid->ha + edid->hso + edid->hspw - 1) << 16); + + dp->vtotal = (edid->va - 1) | ((edid->va + edid->vbl - 1) << 16); + + dp->vblank = (edid->va - 1) | ((edid->va + edid->vbl - 1) << 16); + + dp->vsync = (edid->va + edid->vso - 1) | + ((edid->va + edid->vso + edid->vspw - 1) << 16); + + /* PIPEASRC is wid-1 x ht-1 */ + dp->pipesrc = (edid->ha-1)<<16 | (edid->va-1); + + dp->pfa_pos = 0; + + dp->pfa_ctl = PF_ENABLE | PF_FILTER_MED_3x3; + /* IVB hack */ + if (dp->gen == 6) + dp->pfa_ctl |= PF_PIPE_SEL_IVB(dp->pipe); + + dp->pfa_sz = (edid->ha << 16) | (edid->va); + + /* step 3. Call the linux code we pulled in. */ + dp->flags = intel_ddi_calc_transcoder_flags(edid->panel_bits_per_pixel, + dp->port, + dp->pipe, + dp->type, + dp->lane_count, + dp->pfa_sz, + dp->edid.phsync == '+'?1:0, + dp->edid.pvsync == '+'?1:0); + + dp->transcoder = intel_ddi_get_transcoder(dp->port, + dp->pipe); + + intel_dp_compute_m_n(edid->panel_bits_per_pixel, + dp->lane_count, + dp->edid.pixel_clock, + dp->edid.link_clock, + &dp->m_n); + + printk(BIOS_SPEW, "dp->lane_count = 0x%08x\n",dp->lane_count); + printk(BIOS_SPEW, "dp->stride = 0x%08x\n",dp->stride); + printk(BIOS_SPEW, "dp->htotal = 0x%08x\n", dp->htotal); + printk(BIOS_SPEW, "dp->hblank = 0x%08x\n", dp->hblank); + printk(BIOS_SPEW, "dp->hsync = 0x%08x\n", dp->hsync); + printk(BIOS_SPEW, "dp->vtotal = 0x%08x\n", dp->vtotal); + printk(BIOS_SPEW, "dp->vblank = 0x%08x\n", dp->vblank); + printk(BIOS_SPEW, "dp->vsync = 0x%08x\n", dp->vsync); + printk(BIOS_SPEW, "dp->pipesrc = 0x%08x\n", dp->pipesrc); + printk(BIOS_SPEW, "dp->pfa_pos = 0x%08x\n", dp->pfa_pos); + printk(BIOS_SPEW, "dp->pfa_ctl = 0x%08x\n", dp->pfa_ctl); + printk(BIOS_SPEW, "dp->pfa_sz = 0x%08x\n", dp->pfa_sz); + printk(BIOS_SPEW, "dp->link_m = 0x%08x\n", dp->m_n.link_m); + printk(BIOS_SPEW, "dp->link_n = 0x%08x\n", dp->m_n.link_n); + printk(BIOS_SPEW, "0x6f030 = 0x%08x\n", + TU_SIZE(dp->m_n.tu) | dp->m_n.gmch_m); + printk(BIOS_SPEW, "0x6f030 = 0x%08x\n", dp->m_n.gmch_m); + printk(BIOS_SPEW, "0x6f034 = 0x%08x\n", dp->m_n.gmch_n); + printk(BIOS_SPEW, "dp->flags = 0x%08x\n", dp->flags); +} |