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Three fixes for vc4 that addresses dual-display breakages 

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Merge tag 'drm-misc-next-fixes-2020-10-02' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

Three fixes for vc4 that addresses dual-display breakages

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201002065243.ry7gp4or3ywhluer@gilmour.lan
This commit is contained in:
Dave Airlie 2020-10-10 05:44:32 +10:00
parent edb899841c 8ba0b6d196
commit 083320ebe6
3 changed files with 29 additions and 9 deletions
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14
drivers/gpu/drm/vc4/vc4_crtc.c
View File

@ -852,11 +852,19 @@ void vc4_crtc_destroy_state(struct drm_crtc *crtc,
void vc4_crtc_reset(struct drm_crtc *crtc)
{
struct vc4_crtc_state *vc4_crtc_state;
if (crtc->state)
vc4_crtc_destroy_state(crtc, crtc->state);
crtc->state = kzalloc(sizeof(struct vc4_crtc_state), GFP_KERNEL);
if (crtc->state)
__drm_atomic_helper_crtc_reset(crtc, crtc->state);
vc4_crtc_state = kzalloc(sizeof(*vc4_crtc_state), GFP_KERNEL);
if (!vc4_crtc_state) {
crtc->state = NULL;
return;
}
vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED;
__drm_atomic_helper_crtc_reset(crtc, &vc4_crtc_state->base);
}
static const struct drm_crtc_funcs vc4_crtc_funcs = {

2
drivers/gpu/drm/vc4/vc4_drv.h
View File

@ -532,6 +532,8 @@ struct vc4_crtc_state {
} margins;
};
#define VC4_HVS_CHANNEL_DISABLED ((unsigned int)-1)
static inline struct vc4_crtc_state *
to_vc4_crtc_state(struct drm_crtc_state *crtc_state)
{

22
drivers/gpu/drm/vc4/vc4_kms.c
View File

@ -616,7 +616,7 @@ static int
vc4_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
{
unsigned long unassigned_channels = GENMASK(NUM_CHANNELS - 1, 0);
struct drm_crtc_state *crtc_state;
struct drm_crtc_state *old_crtc_state, *new_crtc_state;
struct drm_crtc *crtc;
int i, ret;
@ -629,6 +629,8 @@ vc4_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
* modified.
*/
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
struct drm_crtc_state *crtc_state;
if (!crtc->state->enable)
continue;
@ -637,15 +639,23 @@ vc4_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
return PTR_ERR(crtc_state);
}
for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
struct vc4_crtc_state *vc4_crtc_state =
to_vc4_crtc_state(crtc_state);
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
struct vc4_crtc_state *new_vc4_crtc_state =
to_vc4_crtc_state(new_crtc_state);
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
unsigned int matching_channels;
if (!crtc_state->active)
if (old_crtc_state->enable && !new_crtc_state->enable)
new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED;
if (!new_crtc_state->enable)
continue;
if (new_vc4_crtc_state->assigned_channel != VC4_HVS_CHANNEL_DISABLED) {
unassigned_channels &= ~BIT(new_vc4_crtc_state->assigned_channel);
continue;
}
/*
* The problem we have to solve here is that we have
* up to 7 encoders, connected to up to 6 CRTCs.
@ -674,7 +684,7 @@ vc4_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
if (matching_channels) {
unsigned int channel = ffs(matching_channels) - 1;
vc4_crtc_state->assigned_channel = channel;
new_vc4_crtc_state->assigned_channel = channel;
unassigned_channels &= ~BIT(channel);
} else {
return -EINVAL;