[Intel-gfx] [PATCH 3/7] drm/i915: Fix watermark calculation in self-refresh mode
Zhenyu Wang
zhenyuw at linux.intel.com
Sat Jun 12 08:32:23 CEST 2010
From: Zhao Yakui <yakui.zhao at intel.com>
For self-refresh mode WM calculation's "line time" should use
mode's htotal instead of hdisplay. "surface width" is the hdisplay
for display plane and 64 for cursor plane.
Signed-off-by: Zhao Yakui <yakui.zhao at intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 3 +-
drivers/gpu/drm/i915/intel_display.c | 42 ++++++++++++++++++++-------------
2 files changed, 27 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 9ed8ecd..70b6da1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -176,7 +176,8 @@ struct drm_i915_display_funcs {
int (*get_display_clock_speed)(struct drm_device *dev);
int (*get_fifo_size)(struct drm_device *dev, int plane);
void (*update_wm)(struct drm_device *dev, int planea_clock,
- int planeb_clock, int sr_hdisplay, int pixel_size);
+ int planeb_clock, int sr_hdisplay, int sr_htotal,
+ int pixel_size);
/* clock updates for mode set */
/* cursor updates */
/* render clock increase/decrease */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index c757019..2c3377e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2808,7 +2808,8 @@ static int i830_get_fifo_size(struct drm_device *dev, int plane)
}
static void pineview_update_wm(struct drm_device *dev, int planea_clock,
- int planeb_clock, int sr_hdisplay, int pixel_size)
+ int planeb_clock, int sr_hdisplay, int unused,
+ int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 reg;
@@ -2873,7 +2874,8 @@ static void pineview_update_wm(struct drm_device *dev, int planea_clock,
}
static void g4x_update_wm(struct drm_device *dev, int planea_clock,
- int planeb_clock, int sr_hdisplay, int pixel_size)
+ int planeb_clock, int sr_hdisplay, int sr_htotal,
+ int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int total_size, cacheline_size;
@@ -2916,11 +2918,11 @@ static void g4x_update_wm(struct drm_device *dev, int planea_clock,
static const int sr_latency_ns = 12000;
sr_clock = planea_clock ? planea_clock : planeb_clock;
- line_time_us = ((sr_hdisplay * 1000) / sr_clock);
+ line_time_us = ((sr_htotal * 1000) / sr_clock);
/* Use ns/us then divide to preserve precision */
- sr_entries = (((sr_latency_ns / line_time_us) + 1) *
- pixel_size * sr_hdisplay) / 1000;
+ sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
+ pixel_size * sr_hdisplay;
sr_entries = roundup(sr_entries / cacheline_size, 1);
DRM_DEBUG("self-refresh entries: %d\n", sr_entries);
I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
@@ -2947,7 +2949,8 @@ static void g4x_update_wm(struct drm_device *dev, int planea_clock,
}
static void i965_update_wm(struct drm_device *dev, int planea_clock,
- int planeb_clock, int sr_hdisplay, int pixel_size)
+ int planeb_clock, int sr_hdisplay, int sr_htotal,
+ int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long line_time_us;
@@ -2959,11 +2962,11 @@ static void i965_update_wm(struct drm_device *dev, int planea_clock,
static const int sr_latency_ns = 12000;
sr_clock = planea_clock ? planea_clock : planeb_clock;
- line_time_us = ((sr_hdisplay * 1000) / sr_clock);
+ line_time_us = ((sr_htotal * 1000) / sr_clock);
/* Use ns/us then divide to preserve precision */
- sr_entries = (((sr_latency_ns / line_time_us) + 1) *
- pixel_size * sr_hdisplay) / 1000;
+ sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
+ pixel_size * sr_hdisplay;
sr_entries = roundup(sr_entries / I915_FIFO_LINE_SIZE, 1);
DRM_DEBUG("self-refresh entries: %d\n", sr_entries);
srwm = I945_FIFO_SIZE - sr_entries;
@@ -2987,7 +2990,8 @@ static void i965_update_wm(struct drm_device *dev, int planea_clock,
}
static void i9xx_update_wm(struct drm_device *dev, int planea_clock,
- int planeb_clock, int sr_hdisplay, int pixel_size)
+ int planeb_clock, int sr_hdisplay, int sr_htotal,
+ int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t fwater_lo;
@@ -3032,11 +3036,11 @@ static void i9xx_update_wm(struct drm_device *dev, int planea_clock,
static const int sr_latency_ns = 6000;
sr_clock = planea_clock ? planea_clock : planeb_clock;
- line_time_us = ((sr_hdisplay * 1000) / sr_clock);
+ line_time_us = ((sr_htotal * 1000) / sr_clock);
/* Use ns/us then divide to preserve precision */
- sr_entries = (((sr_latency_ns / line_time_us) + 1) *
- pixel_size * sr_hdisplay) / 1000;
+ sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
+ pixel_size * sr_hdisplay;
sr_entries = roundup(sr_entries / cacheline_size, 1);
DRM_DEBUG_KMS("self-refresh entries: %d\n", sr_entries);
srwm = total_size - sr_entries;
@@ -3075,7 +3079,7 @@ static void i9xx_update_wm(struct drm_device *dev, int planea_clock,
}
static void i830_update_wm(struct drm_device *dev, int planea_clock, int unused,
- int unused2, int pixel_size)
+ int unused2, int unused3, int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t fwater_lo = I915_READ(FW_BLC) & ~0xfff;
@@ -3095,7 +3099,8 @@ static void i830_update_wm(struct drm_device *dev, int planea_clock, int unused,
#define ILK_LP0_PLANE_LATENCY 700
static void ironlake_update_wm(struct drm_device *dev, int planea_clock,
- int planeb_clock, int sr_hdisplay, int pixel_size)
+ int planeb_clock, int sr_hdisplay, int sr_htotal,
+ int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
@@ -3157,7 +3162,7 @@ static void ironlake_update_wm(struct drm_device *dev, int planea_clock,
int ilk_sr_latency = I915_READ(MLTR_ILK) & ILK_SRLT_MASK;
sr_clock = planea_clock ? planea_clock : planeb_clock;
- line_time_us = ((sr_hdisplay * 1000) / sr_clock);
+ line_time_us = ((sr_htotal * 1000) / sr_clock);
/* Use ns/us then divide to preserve precision */
line_count = ((ilk_sr_latency * 500) / line_time_us + 1000)
@@ -3217,6 +3222,7 @@ static void ironlake_update_wm(struct drm_device *dev, int planea_clock,
* bytes per pixel
* where
* line time = htotal / dotclock
+ * surface width = hdisplay for normal plane and 64 for cursor
* and latency is assumed to be high, as above.
*
* The final value programmed to the register should always be rounded up,
@@ -3233,6 +3239,7 @@ static void intel_update_watermarks(struct drm_device *dev)
int sr_hdisplay = 0;
unsigned long planea_clock = 0, planeb_clock = 0, sr_clock = 0;
int enabled = 0, pixel_size = 0;
+ int sr_htotal = 0;
if (!dev_priv->display.update_wm)
return;
@@ -3253,6 +3260,7 @@ static void intel_update_watermarks(struct drm_device *dev)
}
sr_hdisplay = crtc->mode.hdisplay;
sr_clock = crtc->mode.clock;
+ sr_htotal = crtc->mode.htotal;
if (crtc->fb)
pixel_size = crtc->fb->bits_per_pixel / 8;
else
@@ -3264,7 +3272,7 @@ static void intel_update_watermarks(struct drm_device *dev)
return;
dev_priv->display.update_wm(dev, planea_clock, planeb_clock,
- sr_hdisplay, pixel_size);
+ sr_hdisplay, sr_htotal, pixel_size);
}
static int intel_crtc_mode_set(struct drm_crtc *crtc,
--
1.7.0.4
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