diff options
Diffstat (limited to 'drivers/gpu/drm/arm/malidp_hw.c')
| -rw-r--r-- | drivers/gpu/drm/arm/malidp_hw.c | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c index 449b7ef0a77f..b5c645cf4d1c 100644 --- a/drivers/gpu/drm/arm/malidp_hw.c +++ b/drivers/gpu/drm/arm/malidp_hw.c @@ -27,7 +27,8 @@ enum { MW_NOT_ENABLED = 0, /* SE writeback not enabled */ MW_ONESHOT, /* SE in one-shot mode for writeback */ MW_START, /* SE started writeback */ - MW_STOP, /* SE finished writeback */ + MW_RESTART, /* SE will start another writeback after this one */ + MW_STOP, /* SE needs to stop after this writeback */ }; static const struct malidp_format_id malidp500_de_formats[] = { @@ -231,9 +232,12 @@ static bool malidp500_in_config_mode(struct malidp_hw_device *hwdev) return false; } -static void malidp500_set_config_valid(struct malidp_hw_device *hwdev) +static void malidp500_set_config_valid(struct malidp_hw_device *hwdev, u8 value) { - malidp_hw_setbits(hwdev, MALIDP_CFG_VALID, MALIDP500_CONFIG_VALID); + if (value) + malidp_hw_setbits(hwdev, MALIDP_CFG_VALID, MALIDP500_CONFIG_VALID); + else + malidp_hw_clearbits(hwdev, MALIDP_CFG_VALID, MALIDP500_CONFIG_VALID); } static void malidp500_modeset(struct malidp_hw_device *hwdev, struct videomode *mode) @@ -386,7 +390,11 @@ static int malidp500_enable_memwrite(struct malidp_hw_device *hwdev, /* enable the scaling engine block */ malidp_hw_setbits(hwdev, MALIDP_SCALE_ENGINE_EN, de_base + MALIDP_DE_DISPLAY_FUNC); - hwdev->mw_state = MW_START; + /* restart the writeback if already enabled */ + if (hwdev->mw_state != MW_NOT_ENABLED) + hwdev->mw_state = MW_RESTART; + else + hwdev->mw_state = MW_START; malidp_hw_write(hwdev, fmt_id, base + MALIDP_MW_FORMAT); switch (num_planes) { @@ -415,7 +423,7 @@ static void malidp500_disable_memwrite(struct malidp_hw_device *hwdev) { u32 base = malidp_get_block_base(hwdev, MALIDP_DE_BLOCK); - if (hwdev->mw_state == MW_START) + if (hwdev->mw_state == MW_START || hwdev->mw_state == MW_RESTART) hwdev->mw_state = MW_STOP; malidp_hw_clearbits(hwdev, MALIDP_SE_MEMWRITE_EN, MALIDP500_SE_CONTROL); malidp_hw_clearbits(hwdev, MALIDP_SCALE_ENGINE_EN, base + MALIDP_DE_DISPLAY_FUNC); @@ -500,9 +508,12 @@ static bool malidp550_in_config_mode(struct malidp_hw_device *hwdev) return false; } -static void malidp550_set_config_valid(struct malidp_hw_device *hwdev) +static void malidp550_set_config_valid(struct malidp_hw_device *hwdev, u8 value) { - malidp_hw_setbits(hwdev, MALIDP_CFG_VALID, MALIDP550_CONFIG_VALID); + if (value) + malidp_hw_setbits(hwdev, MALIDP_CFG_VALID, MALIDP550_CONFIG_VALID); + else + malidp_hw_clearbits(hwdev, MALIDP_CFG_VALID, MALIDP550_CONFIG_VALID); } static void malidp550_modeset(struct malidp_hw_device *hwdev, struct videomode *mode) @@ -1005,15 +1016,21 @@ static irqreturn_t malidp_se_irq(int irq, void *arg) /* disable writeback after stop */ hwdev->mw_state = MW_NOT_ENABLED; break; + case MW_RESTART: + drm_writeback_signal_completion(&malidp->mw_connector, 0); + /* fall through to a new start */ case MW_START: /* writeback started, need to emulate one-shot mode */ hw->disable_memwrite(hwdev); /* - * only set config_valid HW bit if there is no - * other update in progress + * only set config_valid HW bit if there is no other update + * in progress or if we raced ahead of the DE IRQ handler + * and config_valid flag will not be update until later */ - if (atomic_read(&malidp->config_valid) != MALIDP_CONFIG_START) - hw->set_config_valid(hwdev); + status = malidp_hw_read(hwdev, hw->map.dc_base + MALIDP_REG_STATUS); + if ((atomic_read(&malidp->config_valid) != MALIDP_CONFIG_START) || + (status & hw->map.dc_irq_map.vsync_irq)) + hw->set_config_valid(hwdev, 1); break; } } |
