In Display 20+, new registers are added for setting index, reading
histogram and writing the IET.
v2: Removed duplicate code (Jani)
v3: Moved histogram core changes to earlier patches (Jani/Suraj)
v4: Rebased after addressing comments on patch 1
v5: Added the retry logic from patch3 and rebased the patch series
v6: optimize wite_iet() (Suraj)
Bspec: 68895
Signed-off-by: Arun R Murthy <arun.r.murthy@xxxxxxxxx>
---
.../gpu/drm/i915/display/intel_histogram.c | 105 +++++++++++++-----
.../drm/i915/display/intel_histogram_regs.h | 25 +++++
2 files changed, 103 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_histogram.c b/drivers/gpu/drm/i915/display/intel_histogram.c
index 66006b75efaa..48495480107e 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram.c
+++ b/drivers/gpu/drm/i915/display/intel_histogram.c
@@ -29,6 +29,37 @@ struct intel_histogram {
u32 bin_data[HISTOGRAM_BIN_COUNT];
};
+static void set_bin_index_0(struct intel_display *display, enum pipe pipe)
+{
+ if (DISPLAY_VER(display) >= 20)
+ intel_de_rmw(display, DPST_IE_INDEX(pipe),
+ DPST_IE_BIN_INDEX_MASK, DPST_IE_BIN_INDEX(0));
+ else
+ intel_de_rmw(display, DPST_CTL(pipe),
+ DPST_CTL_BIN_REG_MASK,
+ DPST_CTL_BIN_REG_CLEAR);
+}
+
+static void write_iet(struct intel_display *display, enum pipe pipe,
+ u32 *data)
+{
+ int i;
+
+ for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
+ if (DISPLAY_VER(display) >= 20)
+ intel_de_rmw(display, DPST_IE_BIN(pipe),
+ DPST_IE_BIN_DATA_MASK,
+ DPST_IE_BIN_DATA(data[i]));
+ else
+ intel_de_rmw(display, DPST_BIN(pipe),
+ DPST_BIN_DATA_MASK,
+ DPST_BIN_DATA(data[i]));
+
+ drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n",
+ i, data[i]);
+ }
+}
+
static bool intel_histogram_get_data(struct intel_crtc *intel_crtc)
{
struct intel_display *display = to_intel_display(intel_crtc);
@@ -36,12 +67,27 @@ static bool intel_histogram_get_data(struct intel_crtc *intel_crtc)
int index;
u32 dpstbin;
+ if (DISPLAY_VER(display) >= 20)
+ intel_de_rmw(display, DPST_HIST_INDEX(intel_crtc->pipe),
+ DPST_HIST_BIN_INDEX_MASK,
+ DPST_HIST_BIN_INDEX(0));
+ else
+ intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
+ DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0);
+
for (index = 0; index < ARRAY_SIZE(histogram->bin_data); index++) {
- dpstbin = intel_de_read(display, DPST_BIN(intel_crtc->pipe));
+ dpstbin = intel_de_read(display, (DISPLAY_VER(display) >= 20 ?
+ DPST_HIST_BIN(intel_crtc->pipe) :
+ DPST_BIN(intel_crtc->pipe)));
if (!(dpstbin & DPST_BIN_BUSY)) {
- histogram->bin_data[index] = dpstbin & DPST_BIN_DATA_MASK;
- } else
+ histogram->bin_data[index] = dpstbin & (DISPLAY_VER(display) >= 20 ?
+ DPST_HIST_BIN_DATA_MASK :
+ DPST_BIN_DATA_MASK);
+ } else {
+ drm_err(display->drm, "Histogram bin busy, retyring\n");
+ fsleep(2);
return false;
+ }
}
return true;
}
@@ -69,8 +115,6 @@ static void intel_histogram_handle_int_work(struct work_struct *work)
* Set DPST_CTL Bin Reg function select to TC
* Set DPST_CTL Bin Register Index to 0
*/
- intel_de_rmw(display, DPST_CTL(intel_crtc->pipe),
- DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_BIN_REG_MASK, 0);
for (retry = 0; retry < HISTOGRAM_BIN_READ_RETRY_COUNT; retry++) {
if (intel_histogram_get_data(intel_crtc)) {
u32 *data;
@@ -165,15 +209,26 @@ static int intel_histogram_enable(struct intel_crtc *intel_crtc)
if (histogram->enable)
return 0;
- /* enable histogram, clear DPST_CTL bin reg func select to TC */
- intel_de_rmw(display, DPST_CTL(pipe),
- DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_IE_HIST_EN |
- DPST_CTL_HIST_MODE | DPST_CTL_IE_TABLE_VALUE_FORMAT |
- DPST_CTL_ENHANCEMENT_MODE_MASK | DPST_CTL_IE_MODI_TABLE_EN,
- DPST_CTL_BIN_REG_FUNC_TC | DPST_CTL_IE_HIST_EN |
- DPST_CTL_HIST_MODE_HSV |
- DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC |
- DPST_CTL_EN_MULTIPLICATIVE | DPST_CTL_IE_MODI_TABLE_EN);
+ /* enable histogram, clear DPST_BIN reg and select TC function */
+ if (DISPLAY_VER(display) >= 20)
+ intel_de_rmw(display, DPST_CTL(pipe),
+ DPST_CTL_IE_HIST_EN |
+ DPST_CTL_HIST_MODE,
+ DPST_CTL_IE_HIST_EN |
+ DPST_CTL_HIST_MODE_HSV);
+ else
+ /* enable histogram, clear DPST_BIN reg and select TC function */
+ intel_de_rmw(display, DPST_CTL(pipe),
+ DPST_CTL_BIN_REG_FUNC_SEL | DPST_CTL_IE_HIST_EN |
+ DPST_CTL_HIST_MODE |
+ DPST_CTL_IE_TABLE_VALUE_FORMAT |
+ DPST_CTL_ENHANCEMENT_MODE_MASK |
+ DPST_CTL_IE_MODI_TABLE_EN,
+ DPST_CTL_BIN_REG_FUNC_TC | DPST_CTL_IE_HIST_EN |
+ DPST_CTL_HIST_MODE_HSV |
+ DPST_CTL_IE_TABLE_VALUE_FORMAT_1INT_9FRAC |
+ DPST_CTL_EN_MULTIPLICATIVE |
+ DPST_CTL_IE_MODI_TABLE_EN);
/* Re-Visit: check if wait for one vblank is required */
drm_crtc_wait_one_vblank(&intel_crtc->base);
@@ -242,7 +297,6 @@ int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc,
struct intel_histogram *histogram = intel_crtc->histogram;
struct intel_display *display = to_intel_display(intel_crtc);
int pipe = intel_crtc->pipe;
- int i = 0;
struct drm_histogram *hist;
u32 *data;
int ret;
@@ -260,15 +314,15 @@ int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc,
return -EINVAL;
}
- /* Set DPST_CTL Bin Reg function select to IE & wait for a vblabk */
- intel_de_rmw(display, DPST_CTL(pipe),
- DPST_CTL_BIN_REG_FUNC_SEL, DPST_CTL_BIN_REG_FUNC_IE);
- drm_crtc_wait_one_vblank(&intel_crtc->base);
+ if (DISPLAY_VER(display) < 20) {
+ /* Set DPST_CTL Bin Reg function select to IE & wait for a vblabk */
+ intel_de_rmw(display, DPST_CTL(pipe),
+ DPST_CTL_BIN_REG_FUNC_SEL,
+ DPST_CTL_BIN_REG_FUNC_IE);
+ }
- /* Set DPST_CTL Bin Register Index to 0 */
- intel_de_rmw(display, DPST_CTL(pipe),
- DPST_CTL_BIN_REG_MASK, DPST_CTL_BIN_REG_CLEAR);
+ set_bin_index_0(display, pipe);
hist = (struct drm_histogram *)blob->data;
data = kzalloc(sizeof(data) * hist->nr_elements, GFP_KERNEL);
@@ -279,11 +333,8 @@ int intel_histogram_set_iet_lut(struct intel_crtc *intel_crtc,
if (ret)
return ret;
- for (i = 0; i < HISTOGRAM_IET_LENGTH; i++) {
- intel_de_rmw(display, DPST_BIN(pipe),
- DPST_BIN_DATA_MASK, data[i]);
- drm_dbg_atomic(display->drm, "iet_lut[%d]=%x\n", i, data[i]);
- }
+ write_iet(display, pipe, data);
+
kfree(data);
drm_property_blob_put(intel_crtc->base.state->histogram_iet);
diff --git a/drivers/gpu/drm/i915/display/intel_histogram_regs.h b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
index 213c9f483567..3fbb9c2deaae 100644
--- a/drivers/gpu/drm/i915/display/intel_histogram_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_histogram_regs.h
@@ -45,6 +45,31 @@
#define _DPST_BIN_B 0x491C4
#define DPST_BIN(pipe) _MMIO_PIPE(pipe, _DPST_BIN_A, _DPST_BIN_B)
#define DPST_BIN_DATA_MASK REG_GENMASK(23, 0)
+#define DPST_BIN_DATA(val) REG_FIELD_PREP(DPST_BIN_DATA_MASK, val)
#define DPST_BIN_BUSY REG_BIT(31)
+#define _DPST_HIST_INDEX_A 0x490D8
+#define _DPST_HIST_INDEX_B 0x491D8
+#define DPST_HIST_INDEX(pipe) _MMIO_PIPE(pipe, _DPST_HIST_INDEX_A, _DPST_HIST_INDEX_B)
+#define DPST_HIST_BIN_INDEX_MASK REG_GENMASK(4, 0)
+#define DPST_HIST_BIN_INDEX(val) REG_FIELD_PREP(DPST_HIST_BIN_INDEX_MASK, val)
+
+#define _DPST_HIST_BIN_A 0x490C4
+#define _DPST_HIST_BIN_B 0x491C4
+#define DPST_HIST_BIN(pipe) _MMIO_PIPE(pipe, _DPST_HIST_BIN_A, _DPST_HIST_BIN_B)
+#define DPST_HIST_BIN_BUSY REG_BIT(31)
+#define DPST_HIST_BIN_DATA_MASK REG_GENMASK(30, 0)
+
+#define _DPST_IE_BIN_A 0x490CC
+#define _DPST_IE_BIN_B 0x491CC
+#define DPST_IE_BIN(pipe) _MMIO_PIPE(pipe, _DPST_IE_BIN_A, _DPST_IE_BIN_B)
+#define DPST_IE_BIN_DATA_MASK REG_GENMASK(9, 0)
+#define DPST_IE_BIN_DATA(val) REG_FIELD_PREP(DPST_IE_BIN_DATA_MASK, val)
+
+#define _DPST_IE_INDEX_A 0x490DC
+#define _DPST_IE_INDEX_B 0x491DC
+#define DPST_IE_INDEX(pipe) _MMIO_PIPE(pipe, _DPST_IE_INDEX_A, _DPST_IE_INDEX_B)
+#define DPST_IE_BIN_INDEX_MASK REG_GENMASK(6, 0)
+#define DPST_IE_BIN_INDEX(val) REG_FIELD_PREP(DPST_IE_BIN_INDEX_MASK, val)
+
#endif /* __INTEL_HISTOGRAM_REGS_H__ */
--
2.25.1
