From 06b6476d6b291473d0928ed242158a001d50c0f0 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 5 Jan 2010 11:27:29 -0500 Subject: drm/radeon/kms: detect sideport memory on IGP chips This detects if the sideport memory is enabled and if it is VRAM is evicted on suspend/resume. This should fix s/r issues on some IGPs. Signed-off-by: Alex Deucher Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/radeon_atombios.c | 37 ++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) (limited to 'drivers/gpu/drm/radeon/radeon_atombios.c') diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index 183403540113..fa82ca74324e 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -938,6 +938,43 @@ bool radeon_atom_get_clock_info(struct drm_device *dev) return false; } +union igp_info { + struct _ATOM_INTEGRATED_SYSTEM_INFO info; + struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 info_2; +}; + +bool radeon_atombios_sideport_present(struct radeon_device *rdev) +{ + struct radeon_mode_info *mode_info = &rdev->mode_info; + int index = GetIndexIntoMasterTable(DATA, IntegratedSystemInfo); + union igp_info *igp_info; + u8 frev, crev; + u16 data_offset; + + atom_parse_data_header(mode_info->atom_context, index, NULL, &frev, + &crev, &data_offset); + + igp_info = (union igp_info *)(mode_info->atom_context->bios + + data_offset); + + if (igp_info) { + switch (crev) { + case 1: + if (igp_info->info.ucMemoryType & 0xf0) + return true; + break; + case 2: + if (igp_info->info_2.ucMemoryType & 0x0f) + return true; + break; + default: + DRM_ERROR("Unsupported IGP table: %d %d\n", frev, crev); + break; + } + } + return false; +} + bool radeon_atombios_get_tmds_info(struct radeon_encoder *encoder, struct radeon_encoder_int_tmds *tmds) { -- cgit v1.2.3