I've finished doing the bulk of my house moving and have time to test
these patches now. I'm presuming they've not made it into 4.10(.1)
have they?
On Tue, Feb 28, 2017 at 2:18 PM, Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> wrote:
> From: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
>
> This has never worked properly, as the IRQ got retriggered immediately
> on unmask. Remove the IRQ wait dance, as it is apparently safe to disable
> the DC channel at any point in time.
>
> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
> ---
> drivers/gpu/ipu-v3/ipu-dc.c | 61 +++------------------------------------------
> 1 file changed, 4 insertions(+), 57 deletions(-)
>
> diff --git a/drivers/gpu/ipu-v3/ipu-dc.c b/drivers/gpu/ipu-v3/ipu-dc.c
> index 659475c1e44ab..7a4b8362dda8f 100644
> --- a/drivers/gpu/ipu-v3/ipu-dc.c
> +++ b/drivers/gpu/ipu-v3/ipu-dc.c
> @@ -112,8 +112,6 @@ struct ipu_dc_priv {
> struct ipu_dc channels[IPU_DC_NUM_CHANNELS];
> struct mutex mutex;
> struct completion comp;
> - int dc_irq;
> - int dp_irq;
> int use_count;
> };
>
> @@ -262,47 +260,13 @@ void ipu_dc_enable_channel(struct ipu_dc *dc)
> }
> EXPORT_SYMBOL_GPL(ipu_dc_enable_channel);
>
> -static irqreturn_t dc_irq_handler(int irq, void *dev_id)
> -{
> - struct ipu_dc *dc = dev_id;
> - u32 reg;
> -
> - reg = readl(dc->base + DC_WR_CH_CONF);
> - reg &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
> - writel(reg, dc->base + DC_WR_CH_CONF);
> -
> - /* The Freescale BSP kernel clears DIx_COUNTER_RELEASE here */
> -
> - complete(&dc->priv->comp);
> - return IRQ_HANDLED;
> -}
> -
> void ipu_dc_disable_channel(struct ipu_dc *dc)
> {
> - struct ipu_dc_priv *priv = dc->priv;
> - int irq;
> - unsigned long ret;
> u32 val;
>
> - /* TODO: Handle MEM_FG_SYNC differently from MEM_BG_SYNC */
> - if (dc->chno == 1)
> - irq = priv->dc_irq;
> - else if (dc->chno == 5)
> - irq = priv->dp_irq;
> - else
> - return;
> -
> - init_completion(&priv->comp);
> - enable_irq(irq);
> - ret = wait_for_completion_timeout(&priv->comp, msecs_to_jiffies(50));
> - disable_irq(irq);
> - if (ret == 0) {
> - dev_warn(priv->dev, "DC stop timeout after 50 ms\n");
> -
> - val = readl(dc->base + DC_WR_CH_CONF);
> - val &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
> - writel(val, dc->base + DC_WR_CH_CONF);
> - }
> + val = readl(dc->base + DC_WR_CH_CONF);
> + val &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
> + writel(val, dc->base + DC_WR_CH_CONF);
> }
> EXPORT_SYMBOL_GPL(ipu_dc_disable_channel);
>
> @@ -389,7 +353,7 @@ int ipu_dc_init(struct ipu_soc *ipu, struct device *dev,
> struct ipu_dc_priv *priv;
> static int channel_offsets[] = { 0, 0x1c, 0x38, 0x54, 0x58, 0x5c,
> 0x78, 0, 0x94, 0xb4};
> - int i, ret;
> + int i;
>
> priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> if (!priv)
> @@ -410,23 +374,6 @@ int ipu_dc_init(struct ipu_soc *ipu, struct device *dev,
> priv->channels[i].base = priv->dc_reg + channel_offsets[i];
> }
>
> - priv->dc_irq = ipu_map_irq(ipu, IPU_IRQ_DC_FC_1);
> - if (!priv->dc_irq)
> - return -EINVAL;
> - ret = devm_request_irq(dev, priv->dc_irq, dc_irq_handler, 0, NULL,
> - &priv->channels[1]);
> - if (ret < 0)
> - return ret;
> - disable_irq(priv->dc_irq);
> - priv->dp_irq = ipu_map_irq(ipu, IPU_IRQ_DP_SF_END);
> - if (!priv->dp_irq)
> - return -EINVAL;
> - ret = devm_request_irq(dev, priv->dp_irq, dc_irq_handler, 0, NULL,
> - &priv->channels[5]);
> - if (ret < 0)
> - return ret;
> - disable_irq(priv->dp_irq);
> -
> writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(1) |
> DC_WR_CH_CONF_PROG_DI_ID,
> priv->channels[1].base + DC_WR_CH_CONF);
> --
> 2.11.0
>
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