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Fri, 09 Jun 2023 23:01:11 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 359N1ADl028085 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 9 Jun 2023 23:01:10 GMT Received: from jesszhan-linux.qualcomm.com (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Fri, 9 Jun 2023 16:01:10 -0700 From: Jessica Zhang Date: Fri, 9 Jun 2023 15:57:13 -0700 Subject: [PATCH v6 1/6] msm/drm/dsi: Round up DSC hdisplay calculation MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-ID: <20230405-add-dsc-support-v6-1-95eab864d1b6@quicinc.com> References: <20230405-add-dsc-support-v6-0-95eab864d1b6@quicinc.com> In-Reply-To: <20230405-add-dsc-support-v6-0-95eab864d1b6@quicinc.com> To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , David Airlie , Daniel Vetter , Marijn Suijten CC: Konrad Dybcio , , , , , Jessica Zhang X-Mailer: b4 0.13-dev-c6835 X-Developer-Signature: v=1; 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This causes issues for modes where the original hdisplay is not a multiple of 3. To fix this, use DIV_ROUND_UP to divide hdisplay. Suggested-by: Marijn Suijten Fixes: 08802f515c3cf ("drm/msm/dsi: Add support for DSC configuration") Reviewed-by: Marijn Suijten Signed-off-by: Jessica Zhang --- drivers/gpu/drm/msm/dsi/dsi_host.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 1a99d75025dc..a448931af804 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -949,7 +949,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) * pulse width same */ h_total -= hdisplay; - hdisplay = msm_dsc_get_bytes_per_line(msm_host->dsc) / 3; + hdisplay = DIV_ROUND_UP(msm_dsc_get_bytes_per_line(msm_host->dsc), 3); h_total += hdisplay; ha_end = ha_start + hdisplay; } -- 2.40.1