The VRSTEN and HRSTEN bits control whether a CRTC synchronizes its
display signal with an external source on the VIDRST pin. The G200WB
and G200EW3 models synchronize with a BMC chip, but different external
video encoders, such as the Matrox Maven, can also be attached to the
pin.
Only set VRSTEN and HRSTEN bits in the CRTC mode-setting code, so the
driver maintains the bits independently from the BMC. Add the field
set_vidrst to the CRTC state for this purpose. Off by default, control
the CRTC VIDRST setting from the BMC's atomic_check helper. So if a
BMC (or another external clock) requires synchronization, it instructs
the CRTC to synchronize.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/mgag200/mgag200_bmc.c | 26 +++++++++++++++++++-----
drivers/gpu/drm/mgag200/mgag200_drv.h | 5 ++++-
drivers/gpu/drm/mgag200/mgag200_g200er.c | 2 +-
drivers/gpu/drm/mgag200/mgag200_g200ev.c | 2 +-
drivers/gpu/drm/mgag200/mgag200_g200se.c | 2 +-
drivers/gpu/drm/mgag200/mgag200_mode.c | 11 ++++++----
6 files changed, 35 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/mgag200/mgag200_bmc.c b/drivers/gpu/drm/mgag200/mgag200_bmc.c
index 23ef85aa7e37..cb5400333862 100644
--- a/drivers/gpu/drm/mgag200/mgag200_bmc.c
+++ b/drivers/gpu/drm/mgag200/mgag200_bmc.c
@@ -77,11 +77,6 @@ void mgag200_bmc_enable_vidrst(struct mga_device *mdev)
{
u8 tmp;
- /* Ensure that the vrsten and hrsten are set */
- WREG8(MGAREG_CRTCEXT_INDEX, 1);
- tmp = RREG8(MGAREG_CRTCEXT_DATA);
- WREG8(MGAREG_CRTCEXT_DATA, tmp | 0x88);
-
/* Assert rstlvl2 */
WREG8(DAC_INDEX, MGA1064_REMHEADCTL2);
tmp = RREG8(DAC_DATA);
@@ -108,6 +103,25 @@ void mgag200_bmc_enable_vidrst(struct mga_device *mdev)
WREG_DAC(MGA1064_GEN_IO_DATA, tmp);
}
+static int mgag200_bmc_encoder_helper_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct mga_device *mdev = to_mga_device(encoder->dev);
+ struct mgag200_crtc_state *mgag200_crtc_state = to_mgag200_crtc_state(crtc_state);
+
+ if (mdev->info->has_vidrst)
+ mgag200_crtc_state->set_vidrst = true;
+ else
+ mgag200_crtc_state->set_vidrst = false;
+
+ return 0;
+}
+
+static const struct drm_encoder_helper_funcs mgag200_bmc_encoder_helper_funcs = {
+ .atomic_check = mgag200_bmc_encoder_helper_atomic_check,
+};
+
static const struct drm_encoder_funcs mgag200_bmc_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
@@ -190,6 +204,8 @@ int mgag200_bmc_output_init(struct mga_device *mdev, struct drm_connector *physi
DRM_MODE_ENCODER_VIRTUAL, NULL);
if (ret)
return ret;
+ drm_encoder_helper_add(encoder, &mgag200_bmc_encoder_helper_funcs);
+
encoder->possible_crtcs = drm_crtc_mask(crtc);
bmc_connector = &mdev->output.bmc.bmc_connector;
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h b/drivers/gpu/drm/mgag200/mgag200_drv.h
index 7f7dfbd0f013..4b75613de882 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.h
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.h
@@ -179,6 +179,8 @@ struct mgag200_crtc_state {
const struct drm_format_info *format;
struct mgag200_pll_values pixpllc;
+
+ bool set_vidrst;
};
static inline struct mgag200_crtc_state *to_mgag200_crtc_state(struct drm_crtc_state *base)
@@ -430,7 +432,8 @@ void mgag200_crtc_atomic_destroy_state(struct drm_crtc *crtc, struct drm_crtc_st
.atomic_duplicate_state = mgag200_crtc_atomic_duplicate_state, \
.atomic_destroy_state = mgag200_crtc_atomic_destroy_state
-void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mode *mode);
+void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mode *mode,
+ bool set_vidrst);
void mgag200_set_format_regs(struct mga_device *mdev, const struct drm_format_info *format);
void mgag200_enable_display(struct mga_device *mdev);
void mgag200_init_registers(struct mga_device *mdev);
diff --git a/drivers/gpu/drm/mgag200/mgag200_g200er.c b/drivers/gpu/drm/mgag200/mgag200_g200er.c
index 4e8a1756138d..abfbed6ec390 100644
--- a/drivers/gpu/drm/mgag200/mgag200_g200er.c
+++ b/drivers/gpu/drm/mgag200/mgag200_g200er.c
@@ -195,7 +195,7 @@ static void mgag200_g200er_crtc_helper_atomic_enable(struct drm_crtc *crtc,
funcs->disable_vidrst(mdev);
mgag200_set_format_regs(mdev, format);
- mgag200_set_mode_regs(mdev, adjusted_mode);
+ mgag200_set_mode_regs(mdev, adjusted_mode, mgag200_crtc_state->set_vidrst);
if (funcs->pixpllc_atomic_update)
funcs->pixpllc_atomic_update(crtc, old_state);
diff --git a/drivers/gpu/drm/mgag200/mgag200_g200ev.c b/drivers/gpu/drm/mgag200/mgag200_g200ev.c
index d884f3cb0ec7..acc99999e2b5 100644
--- a/drivers/gpu/drm/mgag200/mgag200_g200ev.c
+++ b/drivers/gpu/drm/mgag200/mgag200_g200ev.c
@@ -196,7 +196,7 @@ static void mgag200_g200ev_crtc_helper_atomic_enable(struct drm_crtc *crtc,
funcs->disable_vidrst(mdev);
mgag200_set_format_regs(mdev, format);
- mgag200_set_mode_regs(mdev, adjusted_mode);
+ mgag200_set_mode_regs(mdev, adjusted_mode, mgag200_crtc_state->set_vidrst);
if (funcs->pixpllc_atomic_update)
funcs->pixpllc_atomic_update(crtc, old_state);
diff --git a/drivers/gpu/drm/mgag200/mgag200_g200se.c b/drivers/gpu/drm/mgag200/mgag200_g200se.c
index a824bb8ad579..be4e124102c6 100644
--- a/drivers/gpu/drm/mgag200/mgag200_g200se.c
+++ b/drivers/gpu/drm/mgag200/mgag200_g200se.c
@@ -327,7 +327,7 @@ static void mgag200_g200se_crtc_helper_atomic_enable(struct drm_crtc *crtc,
funcs->disable_vidrst(mdev);
mgag200_set_format_regs(mdev, format);
- mgag200_set_mode_regs(mdev, adjusted_mode);
+ mgag200_set_mode_regs(mdev, adjusted_mode, mgag200_crtc_state->set_vidrst);
if (funcs->pixpllc_atomic_update)
funcs->pixpllc_atomic_update(crtc, old_state);
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index bb6204002cb3..4f4612192e30 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -201,9 +201,9 @@ void mgag200_init_registers(struct mga_device *mdev)
WREG8(MGA_MISC_OUT, misc);
}
-void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mode *mode)
+void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mode *mode,
+ bool set_vidrst)
{
- const struct mgag200_device_info *info = mdev->info;
unsigned int hdisplay, hsyncstart, hsyncend, htotal;
unsigned int vdisplay, vsyncstart, vsyncend, vtotal;
u8 misc, crtcext1, crtcext2, crtcext5;
@@ -238,9 +238,11 @@ void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mod
((hdisplay & 0x100) >> 7) |
((hsyncstart & 0x100) >> 6) |
(htotal & 0x40);
- if (info->has_vidrst)
+ if (set_vidrst)
crtcext1 |= MGAREG_CRTCEXT1_VRSTEN |
MGAREG_CRTCEXT1_HRSTEN;
+ else
+ crtcext1 &= ~(MGAREG_CRTCEXT1_VRSTEN | MGAREG_CRTCEXT1_HRSTEN);
crtcext2 = ((vtotal & 0xc00) >> 10) |
((vdisplay & 0x400) >> 8) |
@@ -656,7 +658,7 @@ void mgag200_crtc_helper_atomic_enable(struct drm_crtc *crtc, struct drm_atomic_
funcs->disable_vidrst(mdev);
mgag200_set_format_regs(mdev, format);
- mgag200_set_mode_regs(mdev, adjusted_mode);
+ mgag200_set_mode_regs(mdev, adjusted_mode, mgag200_crtc_state->set_vidrst);
if (funcs->pixpllc_atomic_update)
funcs->pixpllc_atomic_update(crtc, old_state);
@@ -717,6 +719,7 @@ struct drm_crtc_state *mgag200_crtc_atomic_duplicate_state(struct drm_crtc *crtc
new_mgag200_crtc_state->format = mgag200_crtc_state->format;
memcpy(&new_mgag200_crtc_state->pixpllc, &mgag200_crtc_state->pixpllc,
sizeof(new_mgag200_crtc_state->pixpllc));
+ new_mgag200_crtc_state->set_vidrst = mgag200_crtc_state->set_vidrst;
return &new_mgag200_crtc_state->base;
}
--
2.45.2
