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DRMDisplay: Restore previous framebuffer on shutdown

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This commit is contained in:
Connor McLaughlin
2021-06-21 22:04:59 +10:00
parent 7b87b386a9
commit 859c78fdc0
3 changed files with 24 additions and 0 deletions
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17
src/common/drm_display.cpp
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@ -19,6 +19,10 @@ DRMDisplay::DRMDisplay(int card /*= 1*/) : m_card_id(card) {}
DRMDisplay::~DRMDisplay()
{
// restore original buffer
if (m_prev_crtc)
RestoreBuffer();
if (m_connector)
drmModeFreeConnector(m_connector);
@ -90,6 +94,18 @@ bool DRMDisplay::Initialize(u32 width, u32 height, float refresh_rate)
return TryOpeningCard(m_card_id, width, height, refresh_rate);
}
void DRMDisplay::RestoreBuffer()
{
if (m_prev_crtc)
{
u32 connector_id = m_connector->connector_id;
drmModeSetCrtc(m_card_fd, m_prev_crtc->crtc_id, m_prev_crtc->buffer_id, m_prev_crtc->x, m_prev_crtc->y,
&connector_id, 1, &m_prev_crtc->mode);
drmModeFreeCrtc(m_prev_crtc);
m_prev_crtc = nullptr;
}
}
bool DRMDisplay::TryOpeningCard(int card, u32 width, u32 height, float refresh_rate)
{
if (m_card_fd >= 0)
@ -201,6 +217,7 @@ bool DRMDisplay::TryOpeningCard(int card, u32 width, u32 height, float refresh_r
drmModeFreeResources(resources);
m_card_id = card;
m_prev_crtc = drmModeGetCrtc(m_card_fd, m_crtc_id);
return true;
}