linux-kernel - [PATCH] drm: fix warnings in DSC

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Date:   Wed, 11 Sep 2019 10:47:59 +0200
From:   Benjamin Gaignard <benjamin.gaignard@...com>
To:     <benjamin.gaignard@...aro.org>, <airlied@...ux.ie>,
        <daniel@...ll.ch>, <hwentlan@....com>, <manasi.d.navare@...el.com>
CC:     <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        Benjamin Gaignard <benjamin.gaignard@...com>
Subject: [PATCH] drm: fix warnings in DSC

Remove always false comparisons due to limited range of nfl_bpg_offset
and scale_increment_interval fields.
Warnings detected when compiling with W=1.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
---
 drivers/gpu/drm/drm_dsc.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/gpu/drm/drm_dsc.c b/drivers/gpu/drm/drm_dsc.c
index 77f4e5ae4197..27e5c6036658 100644
--- a/drivers/gpu/drm/drm_dsc.c
+++ b/drivers/gpu/drm/drm_dsc.c
@@ -336,12 +336,6 @@ int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg)
 	else
 		vdsc_cfg->nfl_bpg_offset = 0;
 
-	/* 2^16 - 1 */
-	if (vdsc_cfg->nfl_bpg_offset > 65535) {
-		DRM_DEBUG_KMS("NflBpgOffset is too large for this slice height\n");
-		return -ERANGE;
-	}
-
 	/* Number of groups used to code the entire slice */
 	groups_total = groups_per_line * vdsc_cfg->slice_height;
 
@@ -371,11 +365,6 @@ int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg)
 		vdsc_cfg->scale_increment_interval = 0;
 	}
 
-	if (vdsc_cfg->scale_increment_interval > 65535) {
-		DRM_DEBUG_KMS("ScaleIncrementInterval is large for slice height\n");
-		return -ERANGE;
-	}
-
 	/*
 	 * DSC spec mentions that bits_per_pixel specifies the target
 	 * bits/pixel (bpp) rate that is used by the encoder,
-- 
2.15.0