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drm/gma500: Fix hibernation problems on sdvo encoders 

The state of the SDVO chip is more difficult to save than the LVDS so we do a
full mode set on the crtc to get SDVO operational again. The SDVOB/C register is
also stored just in case we have special bits set in the future.

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
This commit is contained in:
Patrik Jakobsson 2013-04-07 16:35:50 +02:00
parent 888eef2e8c
commit 749387dc8d
1 changed files with 34 additions and 0 deletions
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34
drivers/gpu/drm/gma500/psb_intel_sdvo.c
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@ -134,6 +134,9 @@ struct psb_intel_sdvo {
/* Input timings for adjusted_mode */
struct psb_intel_sdvo_dtd input_dtd;
/* Saved SDVO output states */
uint32_t saveSDVO; /* Can be SDVOB or SDVOC depending on sdvo_reg */
};
struct psb_intel_sdvo_connector {
@ -1830,6 +1833,35 @@ done:
#undef CHECK_PROPERTY
}
static void psb_intel_sdvo_save(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct psb_intel_encoder *psb_intel_encoder =
psb_intel_attached_encoder(connector);
struct psb_intel_sdvo *sdvo =
to_psb_intel_sdvo(&psb_intel_encoder->base);
sdvo->saveSDVO = REG_READ(sdvo->sdvo_reg);
}
static void psb_intel_sdvo_restore(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
struct drm_encoder *encoder =
&psb_intel_attached_encoder(connector)->base;
struct psb_intel_sdvo *sdvo = to_psb_intel_sdvo(encoder);
struct drm_crtc *crtc = encoder->crtc;
REG_WRITE(sdvo->sdvo_reg, sdvo->saveSDVO);
/* Force dpms on upon resume */
psb_intel_sdvo_dpms(encoder, DRM_MODE_DPMS_ON);
/* Force a full mode set on the crtc. We're supposed to have the
mode_config lock already. */
drm_crtc_helper_set_mode(crtc, &crtc->mode, crtc->x, crtc->y, NULL);
}
static const struct drm_encoder_helper_funcs psb_intel_sdvo_helper_funcs = {
.dpms = psb_intel_sdvo_dpms,
.mode_fixup = psb_intel_sdvo_mode_fixup,
@ -1840,6 +1872,8 @@ static const struct drm_encoder_helper_funcs psb_intel_sdvo_helper_funcs = {
static const struct drm_connector_funcs psb_intel_sdvo_connector_funcs = {
.dpms = drm_helper_connector_dpms,
.save = psb_intel_sdvo_save,
.restore = psb_intel_sdvo_restore,
.detect = psb_intel_sdvo_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.set_property = psb_intel_sdvo_set_property,