drm/tidss: Remove unused OCP error flag

We never use the DSS_IRQ_DEVICE_OCP_ERR flag, and the HW doesn't even
have such a bit... So remove it.

Reviewed-by: Devarsh Thakkar <devarsht@ti.com>
Reviewed-by: Aradhya Bhatia <aradhya.bhatia@linux.dev>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241021-tidss-irq-fix-v1-2-82ddaec94e4a@ideasonboard.com

drivers/gpu/drm/tidss/tidss_irq.c

@@ -78,9 +78,6 @@ static irqreturn_t tidss_irq_handler(int irq, void *arg)
 			tidss_crtc_error_irq(crtc, irqstatus);
 	}
 
-	if (irqstatus & DSS_IRQ_DEVICE_OCP_ERR)
-		dev_err_ratelimited(tidss->dev, "OCP error\n");
-
 	return IRQ_HANDLED;
 }
 
@@ -105,7 +102,7 @@ int tidss_irq_install(struct drm_device *ddev, unsigned int irq)
 	if (ret)
 		return ret;
 
-	tidss->irq_mask = DSS_IRQ_DEVICE_OCP_ERR;
+	tidss->irq_mask = 0;
 
 	for (unsigned int i = 0; i < tidss->num_crtcs; ++i) {
 		struct tidss_crtc *tcrtc = to_tidss_crtc(tidss->crtcs[i]);

drivers/gpu/drm/tidss/tidss_irq.h

@@ -19,15 +19,13 @@
  * bit use   |D  |fou|FEOL|FEOL|FEOL|FEOL|  UUUU  |          |
  * bit number|0  |1-3|4-7 |8-11|  12-19  | 20-23  |  24-31   |
  *
- * device bits:	D = OCP error
+ * device bits:	D = Unused
  * WB bits:	f = frame done wb, o = wb buffer overflow,
  *		u = wb buffer uncomplete
  * vp bits:	F = frame done, E = vsync even, O = vsync odd, L = sync lost
  * plane bits:	U = fifo underflow
  */
 
-#define DSS_IRQ_DEVICE_OCP_ERR			BIT(0)
-
 #define DSS_IRQ_DEVICE_FRAMEDONEWB		BIT(1)
 #define DSS_IRQ_DEVICE_WBBUFFEROVERFLOW		BIT(2)
 #define DSS_IRQ_DEVICE_WBUNCOMPLETEERROR	BIT(3)