Re: [PATCH v2 2/5] drm/msm/dpu: add setup_clk_force_ctrl() op to sspp & wb

From: Neil Armstrong
Date: Wed Oct 11 2023 - 09:15:43 EST

On 11/10/2023 14:45, Dmitry Baryshkov wrote:
On Wed, 11 Oct 2023 at 14:59, Neil Armstrong <neil.armstrong@xxxxxxxxxx> wrote:

Starting from SM8550, the SSPP & WB clock controls are moved
the SSPP and WB register range, as it's called "VBIF_CLK_SPLIT"
downstream.

Implement setup_clk_force_ctrl() only starting from major version 9
which corresponds to SM8550 MDSS.

Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>

With two minor issues below fixed:

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>

---
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c | 21 ++++++++++++++++++---
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h | 12 +++++++++++-
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c | 20 +++++++++++++++++---
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h | 7 ++++++-
drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 4 ++--
5 files changed, 54 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
index f2192de93713..5fd213ed6491 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c
@@ -69,6 +69,7 @@
#define SSPP_EXCL_REC_XY_REC1 0x188
#define SSPP_EXCL_REC_SIZE 0x1B4
#define SSPP_EXCL_REC_XY 0x1B8
+#define SSPP_CLK_CTRL 0x330

/* SSPP_SRC_OP_MODE & OP_MODE_REC1 */
#define MDSS_MDP_OP_DEINTERLACE BIT(22)
@@ -581,8 +582,18 @@ static void dpu_hw_sspp_setup_cdp(struct dpu_sw_pipe *pipe,
dpu_setup_cdp(&ctx->hw, cdp_cntl_offset, fmt, enable);
}

+static bool dpu_hw_sspp_setup_clk_force_ctrl(struct dpu_hw_sspp *ctx, bool enable)
+{
+ struct dpu_clk_ctrl_reg sspp_clk_ctrl = {

Nit: static const?

Yep will add


+ .reg_off = SSPP_CLK_CTRL,
+ .bit_off = 0
+ };
+
+ return dpu_hw_clk_force_ctrl(&ctx->hw, &sspp_clk_ctrl, enable);
+}
+
static void _setup_layer_ops(struct dpu_hw_sspp *c,
- unsigned long features)
+ unsigned long features, const struct dpu_mdss_version *mdss_rev)
{
c->ops.setup_format = dpu_hw_sspp_setup_format;
c->ops.setup_rects = dpu_hw_sspp_setup_rects;
@@ -612,6 +623,9 @@ static void _setup_layer_ops(struct dpu_hw_sspp *c,

if (test_bit(DPU_SSPP_CDP, &features))
c->ops.setup_cdp = dpu_hw_sspp_setup_cdp;
+
+ if (mdss_rev->core_major_ver >= 9)
+ c->ops.setup_clk_force_ctrl = dpu_hw_sspp_setup_clk_force_ctrl;
}

#ifdef CONFIG_DEBUG_FS
@@ -672,7 +686,8 @@ int _dpu_hw_sspp_init_debugfs(struct dpu_hw_sspp *hw_pipe, struct dpu_kms *kms,
#endif

struct dpu_hw_sspp *dpu_hw_sspp_init(const struct dpu_sspp_cfg *cfg,
- void __iomem *addr, const struct msm_mdss_data *mdss_data)
+ void __iomem *addr, const struct msm_mdss_data *mdss_data,
+ const struct dpu_mdss_version *mdss_rev)
{
struct dpu_hw_sspp *hw_pipe;

@@ -690,7 +705,7 @@ struct dpu_hw_sspp *dpu_hw_sspp_init(const struct dpu_sspp_cfg *cfg,
hw_pipe->ubwc = mdss_data;
hw_pipe->idx = cfg->id;
hw_pipe->cap = cfg;
- _setup_layer_ops(hw_pipe, hw_pipe->cap->features);
+ _setup_layer_ops(hw_pipe, hw_pipe->cap->features, mdss_rev);

return hw_pipe;
}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h
index cbf4f95ff0fd..f93969fddb22 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h
@@ -271,6 +271,14 @@ struct dpu_hw_sspp_ops {
void (*setup_qos_ctrl)(struct dpu_hw_sspp *ctx,
bool danger_safe_en);

+ /**
+ * setup_clk_force_ctrl - setup clock force control
+ * @ctx: Pointer to pipe context
+ * @enable: enable clock force if true
+ */
+ bool (*setup_clk_force_ctrl)(struct dpu_hw_sspp *ctx,
+ bool enable);
+
/**
* setup_histogram - setup histograms
* @ctx: Pointer to pipe context
@@ -334,9 +342,11 @@ struct dpu_kms;
* @cfg: Pipe catalog entry for which driver object is required
* @addr: Mapped register io address of MDP
* @mdss_data: UBWC / MDSS configuration data
+ * @mdss_rev: dpu core's major and minor versions
*/
struct dpu_hw_sspp *dpu_hw_sspp_init(const struct dpu_sspp_cfg *cfg,
- void __iomem *addr, const struct msm_mdss_data *mdss_data);
+ void __iomem *addr, const struct msm_mdss_data *mdss_data,
+ const struct dpu_mdss_version *mdss_rev);

/**
* dpu_hw_sspp_destroy(): Destroys SSPP driver context
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 ebc416400382..374c2c64c9e4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c
@@ -43,6 +43,7 @@
#define WB_MUX 0x150
#define WB_CROP_CTRL 0x154
#define WB_CROP_OFFSET 0x158
+#define WB_CLK_CTRL 0x178
#define WB_CSC_BASE 0x260
#define WB_DST_ADDR_SW_STATUS 0x2B0
#define WB_CDP_CNTL 0x2B4
@@ -175,8 +176,18 @@ static void dpu_hw_wb_bind_pingpong_blk(
DPU_REG_WRITE(c, WB_MUX, mux_cfg);
}

+static bool dpu_hw_wb_setup_clk_force_ctrl(struct dpu_hw_wb *ctx, bool enable)
+{
+ struct dpu_clk_ctrl_reg wb_clk_ctrl = {

And here too, static const. We can even move them away from the function.

Since it's only used on the function, let's let it here in static const

Neil


+ .reg_off = WB_CLK_CTRL,
+ .bit_off = 0
+ };
+
+ return dpu_hw_clk_force_ctrl(&ctx->hw, &wb_clk_ctrl, enable);
+}
+
static void _setup_wb_ops(struct dpu_hw_wb_ops *ops,
- unsigned long features)
+ unsigned long features, const struct dpu_mdss_version *mdss_rev)
{
ops->setup_outaddress = dpu_hw_wb_setup_outaddress;
ops->setup_outformat = dpu_hw_wb_setup_format;
@@ -192,10 +203,13 @@ static void _setup_wb_ops(struct dpu_hw_wb_ops *ops,

if (test_bit(DPU_WB_INPUT_CTRL, &features))
ops->bind_pingpong_blk = dpu_hw_wb_bind_pingpong_blk;
+
+ if (mdss_rev->core_major_ver >= 9)
+ ops->setup_clk_force_ctrl = dpu_hw_wb_setup_clk_force_ctrl;
}

struct dpu_hw_wb *dpu_hw_wb_init(const struct dpu_wb_cfg *cfg,
- void __iomem *addr)
+ void __iomem *addr, const struct dpu_mdss_version *mdss_rev)
{
struct dpu_hw_wb *c;

@@ -212,7 +226,7 @@ struct dpu_hw_wb *dpu_hw_wb_init(const struct dpu_wb_cfg *cfg,
/* Assign ops */
c->idx = cfg->id;
c->caps = cfg;
- _setup_wb_ops(&c->ops, c->caps->features);
+ _setup_wb_ops(&c->ops, c->caps->features, mdss_rev);

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 2d7db2efa3d0..88792f450a92 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.h
@@ -29,6 +29,7 @@ struct dpu_hw_wb_cfg {
* @setup_outformat: setup output format of writeback block from writeback job
* @setup_qos_lut: setup qos LUT for writeback block based on input
* @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
*/
struct dpu_hw_wb_ops {
@@ -48,6 +49,9 @@ struct dpu_hw_wb_ops {
const struct dpu_format *fmt,
bool enable);

+ bool (*setup_clk_force_ctrl)(struct dpu_hw_wb *ctx,
+ bool enable);
+
void (*bind_pingpong_blk)(struct dpu_hw_wb *ctx,
const enum dpu_pingpong pp);
};
@@ -74,10 +78,11 @@ struct dpu_hw_wb {
* dpu_hw_wb_init() - Initializes the writeback hw driver object.
* @cfg: wb_path catalog entry for which driver object is required
* @addr: mapped register io address of MDP
+ * @mdss_rev: dpu core's major and minor versions
* Return: Error code or allocated dpu_hw_wb context
*/
struct dpu_hw_wb *dpu_hw_wb_init(const struct dpu_wb_cfg *cfg,
- void __iomem *addr);
+ void __iomem *addr, const struct dpu_mdss_version *mdss_rev);

/**
* dpu_hw_wb_destroy(): Destroy writeback hw driver object.
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
index f9215643c71a..f363bcfdfd70 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
@@ -175,7 +175,7 @@ int dpu_rm_init(struct dpu_rm *rm,
struct dpu_hw_wb *hw;
const struct dpu_wb_cfg *wb = &cat->wb[i];

- hw = dpu_hw_wb_init(wb, mmio);
+ hw = dpu_hw_wb_init(wb, mmio, cat->mdss_ver);
if (IS_ERR(hw)) {
rc = PTR_ERR(hw);
DPU_ERROR("failed wb object creation: err %d\n", rc);
@@ -231,7 +231,7 @@ int dpu_rm_init(struct dpu_rm *rm,
struct dpu_hw_sspp *hw;
const struct dpu_sspp_cfg *sspp = &cat->sspp[i];

- hw = dpu_hw_sspp_init(sspp, mmio, mdss_data);
+ hw = dpu_hw_sspp_init(sspp, mmio, mdss_data, cat->mdss_ver);
if (IS_ERR(hw)) {
rc = PTR_ERR(hw);
DPU_ERROR("failed sspp object creation: err %d\n", rc);

--
2.34.1