From: Jessica Zhang <quic_jesszhan@quicinc.com>
To: <freedreno@lists.freedesktop.org>
Cc: linux-arm-msm@vger.kernel.org,
Abhinav Kumar <quic_abhinavk@quicinc.com>,
Kuogee Hsieh <quic_khsieh@quicinc.com>,
Konrad Dybcio <konrad.dybcio@linaro.org>,
dri-devel@lists.freedesktop.org,
Jessica Zhang <quic_jesszhan@quicinc.com>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
Marijn Suijten <marijn.suijten@somainline.org>,
Sean Paul <sean@poorly.run>
Subject: [PATCH v14 5/9] drm/msm: Add MSM-specific DSC helper methods
Date: Wed, 24 May 2023 10:45:18 -0700 [thread overview]
Message-ID: <20230329-rfc-msm-dsc-helper-v14-5-bafc7be95691@quicinc.com> (raw)
In-Reply-To: <20230329-rfc-msm-dsc-helper-v14-0-bafc7be95691@quicinc.com>
Introduce MSM-specific DSC helper methods, as some calculations are
common between DP and DSC.
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
---
drivers/gpu/drm/msm/msm_dsc_helper.h | 38 ++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/drivers/gpu/drm/msm/msm_dsc_helper.h b/drivers/gpu/drm/msm/msm_dsc_helper.h
new file mode 100644
index 000000000000..b9049fe1e279
--- /dev/null
+++ b/drivers/gpu/drm/msm/msm_dsc_helper.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved
+ *
+ * Helper methods for MSM-specific DSC calculations that are common between timing engine,
+ * DSI, and DP.
+ */
+
+#ifndef MSM_DSC_HELPER_H_
+#define MSM_DSC_HELPER_H_
+
+#include <linux/math.h>
+#include <drm/display/drm_dsc_helper.h>
+
+/**
+ * msm_dsc_get_slices_per_intf() - calculate number of slices per interface
+ * @dsc: Pointer to drm dsc config struct
+ * @intf_width: interface width in pixels
+ * Returns: Integer representing the number of slices for the given interface
+ */
+static inline u32 msm_dsc_get_slices_per_intf(const struct drm_dsc_config *dsc, u32 intf_width)
+{
+ return DIV_ROUND_UP(intf_width, dsc->slice_width);
+}
+
+/**
+ * msm_dsc_get_bytes_per_line() - calculate bytes per line
+ * @dsc: Pointer to drm dsc config struct
+ * Returns: Integer value representing bytes per line. DSI and DP need
+ * to perform further calculations to turn this into pclk_per_intf,
+ * such as dividing by different values depending on if widebus is enabled.
+ */
+static inline u32 msm_dsc_get_bytes_per_line(const struct drm_dsc_config *dsc)
+{
+ return dsc->slice_count * dsc->slice_chunk_size;
+}
+
+#endif /* MSM_DSC_HELPER_H_ */
--
2.40.1
next prev parent reply other threads:[~2023-05-24 17:45 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-24 17:45 [PATCH v14 0/9] Introduce MSM-specific DSC helpers Jessica Zhang
2023-05-24 17:45 ` [PATCH v14 1/9] drm/display/dsc: Add flatness and initial scale value calculations Jessica Zhang
2023-05-24 19:05 ` Marijn Suijten
2023-05-25 1:05 ` Jessica Zhang
2023-05-25 20:33 ` Marijn Suijten
2023-05-24 17:45 ` [PATCH v14 2/9] drm/display/dsc: add helper to set semi-const parameters Jessica Zhang
2023-05-24 17:45 ` [PATCH v14 3/9] drm/display/dsc: Add drm_dsc_get_bpp_int helper Jessica Zhang
2023-05-24 19:14 ` Marijn Suijten
2023-05-24 22:38 ` Jessica Zhang
2023-05-25 20:18 ` Marijn Suijten
2023-05-25 21:23 ` Dmitry Baryshkov
2023-05-24 17:45 ` [PATCH v14 4/9] drm/msm/dsi: use DRM DSC helpers for DSC setup Jessica Zhang
2023-05-24 17:45 ` Jessica Zhang [this message]
2023-05-24 17:45 ` [PATCH v14 6/9] drm/msm/dpu: Use fixed DRM DSC helper for det_thresh_flatness Jessica Zhang
2023-05-24 17:45 ` [PATCH v14 7/9] drm/msm/dpu: Fix slice_last_group_size calculation Jessica Zhang
2023-05-24 17:45 ` [PATCH v14 8/9] drm/msm/dsi: Use MSM and DRM DSC helper methods Jessica Zhang
2023-05-24 17:45 ` [PATCH v14 9/9] drm/msm/dsi: update hdisplay calculation for dsi_timing_setup Jessica Zhang
2023-05-24 19:09 ` [PATCH v14 0/9] Introduce MSM-specific DSC helpers Marijn Suijten
2023-06-15 11:31 ` Dmitry Baryshkov
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