linux-kernel - [PATCH v2 2/7] drm/msm/dsi: Remove repeated calculation of slice_per

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Date:   Wed,  5 Oct 2022 20:16:52 +0200
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     phone-devel@...r.kernel.org, Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Vinod Koul <vkoul@...nel.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Alex Deucher <alexander.deucher@....com>,
        Douglas Anderson <dianders@...omium.org>,
        Vladimir Lypak <vladimir.lypak@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        Bjorn Andersson <andersson@...nel.org>,
        David Airlie <airlied@...ux.ie>
Subject: [PATCH v2 2/7] drm/msm/dsi: Remove repeated calculation of slice_per_intf

slice_per_intf is already computed for intf_width, which holds the same
value as hdisplay.

Fixes: 08802f515c3c ("drm/msm/dsi: Add support for DSC configuration")
Reviewed-by: Bjorn Andersson <andersson@...nel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
Reviewed-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
---
 drivers/gpu/drm/msm/dsi/dsi_host.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 70077d1f0f21..c746ed5d61f9 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -842,7 +842,7 @@ static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
 static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mode, u32 hdisplay)
 {
 	struct drm_dsc_config *dsc = msm_host->dsc;
-	u32 reg, intf_width, reg_ctrl, reg_ctrl2;
+	u32 reg, reg_ctrl, reg_ctrl2;
 	u32 slice_per_intf, total_bytes_per_intf;
 	u32 pkt_per_line;
 	u32 bytes_in_slice;
@@ -851,8 +851,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
 	/* first calculate dsc parameters and then program
 	 * compress mode registers
 	 */
-	intf_width = hdisplay;
-	slice_per_intf = DIV_ROUND_UP(intf_width, dsc->slice_width);
+	slice_per_intf = DIV_ROUND_UP(hdisplay, dsc->slice_width);
 
 	/* If slice_per_pkt is greater than slice_per_intf
 	 * then default to 1. This can happen during partial
@@ -861,7 +860,6 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
 	if (slice_per_intf > dsc->slice_count)
 		dsc->slice_count = 1;
 
-	slice_per_intf = DIV_ROUND_UP(hdisplay, dsc->slice_width);
 	bytes_in_slice = DIV_ROUND_UP(dsc->slice_width * dsc->bits_per_pixel, 8);
 
 	dsc->slice_chunk_size = bytes_in_slice;
-- 
2.38.0