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Subject[PATCH v2 3/3] drm/radeon: Cleanup pageflipping IRQ handling for evergreen, si
Date
Same as the previous patch, but for pageflipping now. This also lets us
clear up the copy paste for vblank/vline IRQs.

Changes since v1:
- Preserve the order all registers are written back

Signed-off-by: Lyude <lyude@redhat.com>
---
drivers/gpu/drm/radeon/evergreen.c | 105 ++++++++---------------------------
drivers/gpu/drm/radeon/radeon.h | 7 +--
drivers/gpu/drm/radeon/si.c | 111 +++++++++----------------------------
3 files changed, 51 insertions(+), 172 deletions(-)

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 507a773..44527e6 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -4467,17 +4467,8 @@ void evergreen_disable_interrupt_state(struct radeon_device *rdev)
WREG32(SRBM_INT_CNTL, 0);
for (i = 0; i < rdev->num_crtc; i++)
WREG32(INT_MASK + crtc_offsets[i], 0);
-
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET, 0);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC1_REGISTER_OFFSET, 0);
- if (rdev->num_crtc >= 4) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC2_REGISTER_OFFSET, 0);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC3_REGISTER_OFFSET, 0);
- }
- if (rdev->num_crtc >= 6) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET, 0);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET, 0);
- }
+ for (i = 0; i < rdev->num_crtc; i++)
+ WREG32(GRPH_INT_CONTROL + crtc_offsets[i], 0);

/* only one DAC on DCE5 */
if (!ASIC_IS_DCE5(rdev))
@@ -4581,22 +4572,8 @@ int evergreen_irq_set(struct radeon_device *rdev)
atomic_read(&rdev->irq.pflip[i]), "vblank", i);
}

- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC1_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- if (rdev->num_crtc >= 4) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC2_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC3_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- }
- if (rdev->num_crtc >= 6) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- }
+ for (i = 0; i < rdev->num_crtc; i++)
+ WREG32(GRPH_INT_CONTROL + crtc_offsets[i], GRPH_PFLIP_INT_MASK);

for (i = 0; i < 6; i++) {
radeon_irq_kms_set_irq_n_enabled(
@@ -4626,68 +4603,34 @@ int evergreen_irq_set(struct radeon_device *rdev)
/* Note that the order we write back regs here is important */
static void evergreen_irq_ack(struct radeon_device *rdev)
{
- int i;
+ int i, j;
+ u32 *grph_int = rdev->irq.stat_regs.evergreen.grph_int;
u32 *disp_int = rdev->irq.stat_regs.evergreen.disp_int;
u32 *afmt_status = rdev->irq.stat_regs.evergreen.afmt_status;

for (i = 0; i < 6; i++) {
disp_int[i] = RREG32(evergreen_disp_int_status[i]);
afmt_status[i] = RREG32(AFMT_STATUS + crtc_offsets[i]);
+ if (i < rdev->num_crtc)
+ grph_int[i] = RREG32(GRPH_INT_STATUS + crtc_offsets[i]);
}

- rdev->irq.stat_regs.evergreen.d1grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC0_REGISTER_OFFSET);
- rdev->irq.stat_regs.evergreen.d2grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC1_REGISTER_OFFSET);
- if (rdev->num_crtc >= 4) {
- rdev->irq.stat_regs.evergreen.d3grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC2_REGISTER_OFFSET);
- rdev->irq.stat_regs.evergreen.d4grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC3_REGISTER_OFFSET);
- }
- if (rdev->num_crtc >= 6) {
- rdev->irq.stat_regs.evergreen.d5grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC4_REGISTER_OFFSET);
- rdev->irq.stat_regs.evergreen.d6grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC5_REGISTER_OFFSET);
- }
-
-
- if (rdev->irq.stat_regs.evergreen.d1grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC0_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (rdev->irq.stat_regs.evergreen.d2grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC1_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (disp_int[0] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[0], VBLANK_ACK);
- if (disp_int[0] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[0], VLINE_ACK);
- if (disp_int[1] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[1], VBLANK_ACK);
- if (disp_int[1] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[1], VLINE_ACK);
-
- if (rdev->num_crtc >= 4) {
- if (rdev->irq.stat_regs.evergreen.d3grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC2_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (rdev->irq.stat_regs.evergreen.d4grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC3_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (disp_int[2] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[2], VBLANK_ACK);
- if (disp_int[2] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[2], VLINE_ACK);
- if (disp_int[3] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[3], VBLANK_ACK);
- if (disp_int[3] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[3], VLINE_ACK);
- }
-
- if (rdev->num_crtc >= 6) {
- if (rdev->irq.stat_regs.evergreen.d5grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC4_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (rdev->irq.stat_regs.evergreen.d6grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC5_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (disp_int[4] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[4], VBLANK_ACK);
- if (disp_int[4] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[4], VLINE_ACK);
- if (disp_int[5] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[5], VBLANK_ACK);
- if (disp_int[5] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[5], VLINE_ACK);
+ /* We write back each interrupt register in pairs of two */
+ for (i = 0; i < rdev->num_crtc; i += 2) {
+ for (j = i; j < (i + 2); j++) {
+ if (grph_int[j] & GRPH_PFLIP_INT_OCCURRED)
+ WREG32(GRPH_INT_STATUS + crtc_offsets[j],
+ GRPH_PFLIP_INT_CLEAR);
+ }
+
+ for (j = i; j < (i + 2); j++) {
+ if (disp_int[j] & LB_D1_VBLANK_INTERRUPT)
+ WREG32(VBLANK_STATUS + crtc_offsets[j],
+ VBLANK_ACK);
+ if (disp_int[j] & LB_D1_VLINE_INTERRUPT)
+ WREG32(VLINE_STATUS + crtc_offsets[j],
+ VLINE_ACK);
+ }
}

for (i = 0; i < 6; i++) {
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index e961a8a..edb9686 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -768,12 +768,7 @@ struct r600_irq_stat_regs {

struct evergreen_irq_stat_regs {
u32 disp_int[6];
- u32 d1grph_int;
- u32 d2grph_int;
- u32 d3grph_int;
- u32 d4grph_int;
- u32 d5grph_int;
- u32 d6grph_int;
+ u32 grph_int[6];
u32 afmt_status[6];
};

diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index 8351f06..c88a80e 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -5956,19 +5956,8 @@ static void si_disable_interrupt_state(struct radeon_device *rdev)
WREG32(SRBM_INT_CNTL, 0);
for (i = 0; i < rdev->num_crtc; i++)
WREG32(INT_MASK + crtc_offsets[i], 0);
-
- if (rdev->num_crtc >= 2) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET, 0);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC1_REGISTER_OFFSET, 0);
- }
- if (rdev->num_crtc >= 4) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC2_REGISTER_OFFSET, 0);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC3_REGISTER_OFFSET, 0);
- }
- if (rdev->num_crtc >= 6) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET, 0);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET, 0);
- }
+ for (i = 0; i < rdev->num_crtc; i++)
+ WREG32(GRPH_INT_CONTROL + crtc_offsets[i], 0);

if (!ASIC_IS_NODCE(rdev)) {
WREG32(DAC_AUTODETECT_INT_CONTROL, 0);
@@ -6125,24 +6114,8 @@ int si_irq_set(struct radeon_device *rdev)
atomic_read(&rdev->irq.pflip[i]), "vblank", i);
}

- if (rdev->num_crtc >= 2) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC1_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- }
- if (rdev->num_crtc >= 4) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC2_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC3_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- }
- if (rdev->num_crtc >= 6) {
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET,
- GRPH_PFLIP_INT_MASK);
- }
+ for (i = 0; i < rdev->num_crtc; i++)
+ WREG32(GRPH_INT_CONTROL + crtc_offsets[i], GRPH_PFLIP_INT_MASK);

if (!ASIC_IS_NODCE(rdev)) {
for (i = 0; i < 6; i++) {
@@ -6164,67 +6137,35 @@ int si_irq_set(struct radeon_device *rdev)
/* The order we write back each register here is important */
static inline void si_irq_ack(struct radeon_device *rdev)
{
- int i;
+ int i, j;
u32 *disp_int = rdev->irq.stat_regs.evergreen.disp_int;
+ u32 *grph_int = rdev->irq.stat_regs.evergreen.grph_int;

if (ASIC_IS_NODCE(rdev))
return;

- for (i = 0; i < 6; i++)
+ for (i = 0; i < 6; i++) {
disp_int[i] = RREG32(si_disp_int_status[i]);
+ if (i < rdev->num_crtc)
+ grph_int[i] = RREG32(GRPH_INT_STATUS + crtc_offsets[i]);
+ }

- rdev->irq.stat_regs.evergreen.d1grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC0_REGISTER_OFFSET);
- rdev->irq.stat_regs.evergreen.d2grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC1_REGISTER_OFFSET);
- if (rdev->num_crtc >= 4) {
- rdev->irq.stat_regs.evergreen.d3grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC2_REGISTER_OFFSET);
- rdev->irq.stat_regs.evergreen.d4grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC3_REGISTER_OFFSET);
- }
- if (rdev->num_crtc >= 6) {
- rdev->irq.stat_regs.evergreen.d5grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC4_REGISTER_OFFSET);
- rdev->irq.stat_regs.evergreen.d6grph_int = RREG32(GRPH_INT_STATUS + EVERGREEN_CRTC5_REGISTER_OFFSET);
- }
-
- if (rdev->irq.stat_regs.evergreen.d1grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC0_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (rdev->irq.stat_regs.evergreen.d2grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC1_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (disp_int[0] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[0], VBLANK_ACK);
- if (disp_int[0] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[0], VLINE_ACK);
- if (disp_int[1] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[1], VBLANK_ACK);
- if (disp_int[1] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[1], VLINE_ACK);
-
- if (rdev->num_crtc >= 4) {
- if (rdev->irq.stat_regs.evergreen.d3grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC2_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (rdev->irq.stat_regs.evergreen.d4grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC3_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (disp_int[2] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[2], VBLANK_ACK);
- if (disp_int[2] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[2], VLINE_ACK);
- if (disp_int[3] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[3], VBLANK_ACK);
- if (disp_int[3] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[3], VLINE_ACK);
- }
-
- if (rdev->num_crtc >= 6) {
- if (rdev->irq.stat_regs.evergreen.d5grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC4_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (rdev->irq.stat_regs.evergreen.d6grph_int & GRPH_PFLIP_INT_OCCURRED)
- WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC5_REGISTER_OFFSET, GRPH_PFLIP_INT_CLEAR);
- if (disp_int[4] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[4], VBLANK_ACK);
- if (disp_int[4] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[4], VLINE_ACK);
- if (disp_int[5] & LB_D1_VBLANK_INTERRUPT)
- WREG32(VBLANK_STATUS + crtc_offsets[5], VBLANK_ACK);
- if (disp_int[5] & LB_D1_VLINE_INTERRUPT)
- WREG32(VLINE_STATUS + crtc_offsets[5], VLINE_ACK);
+ /* We write back each interrupt register in pairs of two */
+ for (i = 0; i < rdev->num_crtc; i += 2) {
+ for (j = i; j < (i + 2); j++) {
+ if (grph_int[j] & GRPH_PFLIP_INT_OCCURRED)
+ WREG32(GRPH_INT_STATUS + crtc_offsets[j],
+ GRPH_PFLIP_INT_CLEAR);
+ }
+
+ for (j = i; j < (i + 2); j++) {
+ if (disp_int[j] & LB_D1_VBLANK_INTERRUPT)
+ WREG32(VBLANK_STATUS + crtc_offsets[j],
+ VBLANK_ACK);
+ if (disp_int[j] & LB_D1_VLINE_INTERRUPT)
+ WREG32(VLINE_STATUS + crtc_offsets[j],
+ VLINE_ACK);
+ }
}

for (i = 0; i < 6; i++) {
--
2.9.4
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