Re: [PATCH 10/21] drm/msm/dpu: add CWB support to dpu_hw_wb
From: Jessica Zhang
Date: Tue Sep 03 2024 - 18:23:00 EST
On 8/30/2024 10:41 AM, Dmitry Baryshkov wrote:
On Thu, Aug 29, 2024 at 01:48:31PM GMT, Jessica Zhang wrote:
From: Esha Bharadwaj <quic_ebharadw@xxxxxxxxxxx>
Add function ops to allow hw_wb to configure CWB registers and adjust
the WB_MUX configuration to account for using dedicated CWB pingpong
blocks.
Signed-off-by: Esha Bharadwaj <quic_ebharadw@xxxxxxxxxxx>
Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c | 69 ++++++++++++++++++++++++++++++-
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h | 34 +++++++++++++++
2 files changed, 102 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
index 93ff01c889b5..998c9fbd22a6 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
@@ -51,6 +51,12 @@
#define WB_CDP_CNTL 0x2B4
#define WB_OUT_IMAGE_SIZE 0x2C0
#define WB_OUT_XY 0x2C4
Empty line
+#define CWB_MUX 0x000
+#define CWB_MODE 0x004
+
+/* CWB mux block bit definitions */
+#define CWB_MUX_MASK GENMASK(3, 0)
+#define CWB_MODE_MASK GENMASK(2, 0)
static void dpu_hw_wb_setup_outaddress(struct dpu_hw_wb *ctx,
struct dpu_hw_wb_cfg *data)
@@ -173,7 +179,9 @@ static void dpu_hw_wb_bind_pingpong_blk(
mux_cfg = DPU_REG_READ(c, WB_MUX);
mux_cfg &= ~0xf;
- if (pp)
+ if (pp >= PINGPONG_CWB_0)
+ mux_cfg |= (pp < PINGPONG_CWB_2) ? 0xd : 0xb;
+ else if (pp)
mux_cfg |= (pp - PINGPONG_0) & 0x7;
else
mux_cfg |= 0xf;
@@ -237,3 +245,62 @@ struct dpu_hw_wb *dpu_hw_wb_init(struct drm_device *dev,
return c;
}
+
+static void dpu_hw_cwb_setup_input_ctrl(struct dpu_hw_wb *ctx,
+ enum dpu_cwb cwb_idx,
+ const enum dpu_pingpong pp)
Align to opening bracket, please.
Hi Dmitry,
Acked for all comments here -- I'll squash the 2 cwb ops together.
Thanks,
Jessica Zhang
+{
+ struct dpu_hw_blk_reg_map *c;
+ int cwb_mux_cfg = 0xF;
+
+ if (cwb_idx < CWB_0 || cwb_idx >= CWB_MAX)
+ return;
+
+ c = &ctx->cwb_hw[cwb_idx - CWB_0];
+
+ /*
+ * The CWB_MUX register takes the pingpong index relative to
+ * PINGPONG_CWB_0 and not PINGPONG_0
+ */
+ if ((pp != PINGPONG_NONE) && (pp < PINGPONG_MAX))
+ cwb_mux_cfg = FIELD_PREP(CWB_MUX_MASK, pp - PINGPONG_CWB_0);
+
+ DPU_REG_WRITE(c, CWB_MUX, cwb_mux_cfg);
+}
+
+static void dpu_hw_cwb_setup_input_mode(struct dpu_hw_wb *ctx,
+ enum dpu_cwb cwb_idx,
+ const enum cwb_mode_input input)
+{
+ struct dpu_hw_blk_reg_map *c;
+ int cwb_mux_cfg;
+
+ if (cwb_idx < CWB_0 || cwb_idx >= CWB_MAX || input >= INPUT_MODE_MAX)
+ return;
+
+ c = &ctx->cwb_hw[cwb_idx - CWB_0];
+ cwb_mux_cfg = FIELD_PREP(CWB_MODE_MASK, input);
+
+ DPU_REG_WRITE(c, CWB_MODE, cwb_mux_cfg);
+}
+
+static void _setup_cwb_ops(struct dpu_hw_wb_ops *ops)
+{
+ ops->setup_input_ctrl = dpu_hw_cwb_setup_input_ctrl;
+ ops->setup_input_mode = dpu_hw_cwb_setup_input_mode;
+}
+
+struct dpu_hw_wb *dpu_hw_wb_init_with_cwb(struct drm_device *dev,
+ const struct dpu_wb_cfg *cfg,
+ void __iomem *addr,
+ const struct dpu_mdss_version *mdss_rev,
+ struct dpu_hw_blk_reg_map *cwb_hw)
+{
+ struct dpu_hw_wb *c = dpu_hw_wb_init(dev, cfg, addr, mdss_rev);
+
+ c->cwb_hw = cwb_hw;
+
+ _setup_cwb_ops(&c->ops);
+
+ return c;
+}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
index 37497473e16c..1ff40f8325e5 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
@@ -21,6 +21,12 @@ struct dpu_hw_wb_cfg {
struct drm_rect crop;
};
+enum cwb_mode_input {
+ INPUT_MODE_LM_OUT,
+ INPUT_MODE_DSPP_OUT,
+ INPUT_MODE_MAX
+};
+
/**
*
* struct dpu_hw_wb_ops : Interface to the wb hw driver functions
@@ -31,6 +37,8 @@ struct dpu_hw_wb_cfg {
* @setup_cdp: setup chroma down prefetch block for writeback block
* @setup_clk_force_ctrl: setup clock force control
* @bind_pingpong_blk: enable/disable the connection with ping-pong block
+ * @setup_ctrl: setup ctrl register for cwb
+ * @setup_mode: setup mode register for cwb
*/
struct dpu_hw_wb_ops {
void (*setup_outaddress)(struct dpu_hw_wb *ctx,
@@ -54,11 +62,20 @@ struct dpu_hw_wb_ops {
void (*bind_pingpong_blk)(struct dpu_hw_wb *ctx,
const enum dpu_pingpong pp);
+
+ void (*setup_input_ctrl)(struct dpu_hw_wb *ctx,
+ enum dpu_cwb cwb_idx,
+ const enum dpu_pingpong pp);
+
+ void (*setup_input_mode)(struct dpu_hw_wb *ctx,
+ enum dpu_cwb cwb_idx,
+ const enum cwb_mode_input input);
Judging by the usage, could you please add single setup_cwb() callback
and let WB code call corresponding functions internally.
};
/**
* struct dpu_hw_wb : WB driver object
* @hw: block hardware details
+ * @cwb_hw: block hardware details of cwb_muxes
* @idx: hardware index number within type
* @wb_hw_caps: hardware capabilities
* @ops: function pointers
@@ -66,6 +83,9 @@ struct dpu_hw_wb_ops {
struct dpu_hw_wb {
struct dpu_hw_blk_reg_map hw;
+ /* cwb data */
+ struct dpu_hw_blk_reg_map *cwb_hw;
+
/* wb path */
int idx;
const struct dpu_wb_cfg *caps;
@@ -87,4 +107,18 @@ struct dpu_hw_wb *dpu_hw_wb_init(struct drm_device *dev,
void __iomem *addr,
const struct dpu_mdss_version *mdss_rev);
+/**
+ * dpu_hw_wb_init_with_cwb() - Initializes the writeback hw driver object with cwb.
+ * @dev: Corresponding device for devres management
+ * @cfg: wb_path catalog entry for which driver object is required
+ * @addr: mapped register io address of MDP
+ * @hw: array of cwb muxes
+ * Return: Error code or allocated dpu_hw_wb context
+ */
Please move the comment to the function body. This way make W=1 will
check that it is valid.
+struct dpu_hw_wb *dpu_hw_wb_init_with_cwb(struct drm_device *dev,
+ const struct dpu_wb_cfg *cfg,
+ void __iomem *addr,
+ const struct dpu_mdss_version *mdss_rev,
+ struct dpu_hw_blk_reg_map *hw);
+
#endif /*_DPU_HW_WB_H */
--
2.34.1
--
With best wishes
Dmitry