2013/8/1 <ville.syrjala@xxxxxxxxxxxxxxx>:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> Adjust the current ILK/SNB/IVB watermark codepaths to use the
> pre-populated latency values from dev_priv instead of reading
> them out from the registers every time.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 9 -------
> drivers/gpu/drm/i915/intel_pm.c | 57 +++++++++++++++++++----------------------
> 2 files changed, 27 insertions(+), 39 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 19941c6..17f6252 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -3202,9 +3202,6 @@
> #define MLTR_WM2_SHIFT 8
> /* the unit of memory self-refresh latency time is 0.5us */
> #define ILK_SRLT_MASK 0x3f
> -#define ILK_LATENCY(shift) (I915_READ(MLTR_ILK) >> (shift) & ILK_SRLT_MASK)
> -#define ILK_READ_WM1_LATENCY() ILK_LATENCY(MLTR_WM1_SHIFT)
> -#define ILK_READ_WM2_LATENCY() ILK_LATENCY(MLTR_WM2_SHIFT)
>
> /* define the fifo size on Ironlake */
> #define ILK_DISPLAY_FIFO 128
> @@ -3251,12 +3248,6 @@
> #define SSKPD_WM2_SHIFT 16
> #define SSKPD_WM3_SHIFT 24
>
> -#define SNB_LATENCY(shift) (I915_READ(MCHBAR_MIRROR_BASE_SNB + SSKPD) >> (shift) & SSKPD_WM_MASK)
> -#define SNB_READ_WM0_LATENCY() SNB_LATENCY(SSKPD_WM0_SHIFT)
> -#define SNB_READ_WM1_LATENCY() SNB_LATENCY(SSKPD_WM1_SHIFT)
> -#define SNB_READ_WM2_LATENCY() SNB_LATENCY(SSKPD_WM2_SHIFT)
> -#define SNB_READ_WM3_LATENCY() SNB_LATENCY(SSKPD_WM3_SHIFT)
> -
> /*
> * The two pipe frame counter registers are not synchronized, so
> * reading a stable value is somewhat tricky. The following code
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 149eb0a..5fe8c4e 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -1665,9 +1665,6 @@ static void i830_update_wm(struct drm_device *dev)
> I915_WRITE(FW_BLC, fwater_lo);
> }
>
> -#define ILK_LP0_PLANE_LATENCY 700
> -#define ILK_LP0_CURSOR_LATENCY 1300
> -
> /*
> * Check the wm result.
> *
> @@ -1782,9 +1779,9 @@ static void ironlake_update_wm(struct drm_device *dev)
> enabled = 0;
> if (g4x_compute_wm0(dev, PIPE_A,
> &ironlake_display_wm_info,
> - ILK_LP0_PLANE_LATENCY,
> + dev_priv->wm.pri_latency[0] * 100,
> &ironlake_cursor_wm_info,
> - ILK_LP0_CURSOR_LATENCY,
> + dev_priv->wm.cur_latency[0] * 100,
> &plane_wm, &cursor_wm)) {
> I915_WRITE(WM0_PIPEA_ILK,
> (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
> @@ -1796,9 +1793,9 @@ static void ironlake_update_wm(struct drm_device *dev)
>
> if (g4x_compute_wm0(dev, PIPE_B,
> &ironlake_display_wm_info,
> - ILK_LP0_PLANE_LATENCY,
> + dev_priv->wm.pri_latency[0] * 100,
> &ironlake_cursor_wm_info,
> - ILK_LP0_CURSOR_LATENCY,
> + dev_priv->wm.cur_latency[0] * 100,
> &plane_wm, &cursor_wm)) {
> I915_WRITE(WM0_PIPEB_ILK,
> (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
> @@ -1822,7 +1819,7 @@ static void ironlake_update_wm(struct drm_device *dev)
>
> /* WM1 */
> if (!ironlake_compute_srwm(dev, 1, enabled,
> - ILK_READ_WM1_LATENCY() * 500,
> + dev_priv->wm.pri_latency[1] * 500,
> &ironlake_display_srwm_info,
> &ironlake_cursor_srwm_info,
> &fbc_wm, &plane_wm, &cursor_wm))
> @@ -1830,14 +1827,14 @@ static void ironlake_update_wm(struct drm_device *dev)
>
> I915_WRITE(WM1_LP_ILK,
> WM1_LP_SR_EN |
> - (ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
> + (dev_priv->wm.pri_latency[1] << WM1_LP_LATENCY_SHIFT) |
> (fbc_wm << WM1_LP_FBC_SHIFT) |
> (plane_wm << WM1_LP_SR_SHIFT) |
> cursor_wm);
>
> /* WM2 */
> if (!ironlake_compute_srwm(dev, 2, enabled,
> - ILK_READ_WM2_LATENCY() * 500,
> + dev_priv->wm.pri_latency[2] * 500,
> &ironlake_display_srwm_info,
> &ironlake_cursor_srwm_info,
> &fbc_wm, &plane_wm, &cursor_wm))
> @@ -1845,7 +1842,7 @@ static void ironlake_update_wm(struct drm_device *dev)
>
> I915_WRITE(WM2_LP_ILK,
> WM2_LP_EN |
> - (ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
> + (dev_priv->wm.pri_latency[2] << WM1_LP_LATENCY_SHIFT) |
> (fbc_wm << WM1_LP_FBC_SHIFT) |
> (plane_wm << WM1_LP_SR_SHIFT) |
> cursor_wm);
> @@ -1859,7 +1856,7 @@ static void ironlake_update_wm(struct drm_device *dev)
> static void sandybridge_update_wm(struct drm_device *dev)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> - int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
> + int latency = dev_priv->wm.pri_latency[0] * 100; /* In unit 0.1us */
> u32 val;
> int fbc_wm, plane_wm, cursor_wm;
> unsigned int enabled;
> @@ -1914,7 +1911,7 @@ static void sandybridge_update_wm(struct drm_device *dev)
>
> /* WM1 */
> if (!ironlake_compute_srwm(dev, 1, enabled,
> - SNB_READ_WM1_LATENCY() * 500,
> + dev_priv->wm.pri_latency[1] * 500,
> &sandybridge_display_srwm_info,
> &sandybridge_cursor_srwm_info,
> &fbc_wm, &plane_wm, &cursor_wm))
> @@ -1922,14 +1919,14 @@ static void sandybridge_update_wm(struct drm_device *dev)
>
> I915_WRITE(WM1_LP_ILK,
> WM1_LP_SR_EN |
> - (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
> + (dev_priv->wm.pri_latency[1] << WM1_LP_LATENCY_SHIFT) |
> (fbc_wm << WM1_LP_FBC_SHIFT) |
> (plane_wm << WM1_LP_SR_SHIFT) |
> cursor_wm);
>
> /* WM2 */
> if (!ironlake_compute_srwm(dev, 2, enabled,
> - SNB_READ_WM2_LATENCY() * 500,
> + dev_priv->wm.pri_latency[2] * 500,
> &sandybridge_display_srwm_info,
> &sandybridge_cursor_srwm_info,
> &fbc_wm, &plane_wm, &cursor_wm))
> @@ -1937,14 +1934,14 @@ static void sandybridge_update_wm(struct drm_device *dev)
>
> I915_WRITE(WM2_LP_ILK,
> WM2_LP_EN |
> - (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
> + (dev_priv->wm.pri_latency[2] << WM1_LP_LATENCY_SHIFT) |
> (fbc_wm << WM1_LP_FBC_SHIFT) |
> (plane_wm << WM1_LP_SR_SHIFT) |
> cursor_wm);
>
> /* WM3 */
> if (!ironlake_compute_srwm(dev, 3, enabled,
> - SNB_READ_WM3_LATENCY() * 500,
> + dev_priv->wm.pri_latency[3] * 500,
> &sandybridge_display_srwm_info,
> &sandybridge_cursor_srwm_info,
> &fbc_wm, &plane_wm, &cursor_wm))
> @@ -1952,7 +1949,7 @@ static void sandybridge_update_wm(struct drm_device *dev)
>
> I915_WRITE(WM3_LP_ILK,
> WM3_LP_EN |
> - (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) |
> + (dev_priv->wm.pri_latency[3] << WM1_LP_LATENCY_SHIFT) |
> (fbc_wm << WM1_LP_FBC_SHIFT) |
> (plane_wm << WM1_LP_SR_SHIFT) |
> cursor_wm);
> @@ -1961,7 +1958,7 @@ static void sandybridge_update_wm(struct drm_device *dev)
> static void ivybridge_update_wm(struct drm_device *dev)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> - int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
> + int latency = dev_priv->wm.pri_latency[0] * 100; /* In unit 0.1us */
> u32 val;
> int fbc_wm, plane_wm, cursor_wm;
> int ignore_fbc_wm, ignore_plane_wm, ignore_cursor_wm;
> @@ -2031,7 +2028,7 @@ static void ivybridge_update_wm(struct drm_device *dev)
>
> /* WM1 */
> if (!ironlake_compute_srwm(dev, 1, enabled,
> - SNB_READ_WM1_LATENCY() * 500,
> + dev_priv->wm.pri_latency[1] * 500,
> &sandybridge_display_srwm_info,
> &sandybridge_cursor_srwm_info,
> &fbc_wm, &plane_wm, &cursor_wm))
> @@ -2039,14 +2036,14 @@ static void ivybridge_update_wm(struct drm_device *dev)
>
> I915_WRITE(WM1_LP_ILK,
> WM1_LP_SR_EN |
> - (SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
> + (dev_priv->wm.pri_latency[1] << WM1_LP_LATENCY_SHIFT) |
> (fbc_wm << WM1_LP_FBC_SHIFT) |
> (plane_wm << WM1_LP_SR_SHIFT) |
> cursor_wm);
>
> /* WM2 */
> if (!ironlake_compute_srwm(dev, 2, enabled,
> - SNB_READ_WM2_LATENCY() * 500,
> + dev_priv->wm.pri_latency[2] * 500,
> &sandybridge_display_srwm_info,
> &sandybridge_cursor_srwm_info,
> &fbc_wm, &plane_wm, &cursor_wm))
> @@ -2054,19 +2051,19 @@ static void ivybridge_update_wm(struct drm_device *dev)
>
> I915_WRITE(WM2_LP_ILK,
> WM2_LP_EN |
> - (SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
> + (dev_priv->wm.pri_latency[2] << WM1_LP_LATENCY_SHIFT) |
> (fbc_wm << WM1_LP_FBC_SHIFT) |
> (plane_wm << WM1_LP_SR_SHIFT) |
> cursor_wm);
>
> /* WM3, note we have to correct the cursor latency */
> if (!ironlake_compute_srwm(dev, 3, enabled,
> - SNB_READ_WM3_LATENCY() * 500,
> + dev_priv->wm.pri_latency[3] * 500,
> &sandybridge_display_srwm_info,
> &sandybridge_cursor_srwm_info,
> &fbc_wm, &plane_wm, &ignore_cursor_wm) ||
> !ironlake_compute_srwm(dev, 3, enabled,
> - 2 * SNB_READ_WM3_LATENCY() * 500,
> + dev_priv->wm.cur_latency[3] * 500,
You've killed WaDoubleCursorLP3Latency here. You should probably
revive it and add the WA name in a comment.
Everything else looks correct. With that fixed: Reviewed-by: Paulo
Zanoni <paulo.r.zanoni@xxxxxxxxx>.
> &sandybridge_display_srwm_info,
> &sandybridge_cursor_srwm_info,
> &ignore_fbc_wm, &ignore_plane_wm, &cursor_wm))
> @@ -2074,7 +2071,7 @@ static void ivybridge_update_wm(struct drm_device *dev)
>
> I915_WRITE(WM3_LP_ILK,
> WM3_LP_EN |
> - (SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) |
> + (dev_priv->wm.pri_latency[3] << WM1_LP_LATENCY_SHIFT) |
> (fbc_wm << WM1_LP_FBC_SHIFT) |
> (plane_wm << WM1_LP_SR_SHIFT) |
> cursor_wm);
> @@ -2818,7 +2815,7 @@ static void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe,
> bool enabled, bool scaled)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> - int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
> + int latency = dev_priv->wm.spr_latency[0] * 100; /* In unit 0.1us */
> u32 val;
> int sprite_wm, reg;
> int ret;
> @@ -2858,7 +2855,7 @@ static void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe,
> ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
> pixel_size,
> &sandybridge_display_srwm_info,
> - SNB_READ_WM1_LATENCY() * 500,
> + dev_priv->wm.spr_latency[1] * 500,
> &sprite_wm);
> if (!ret) {
> DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %c\n",
> @@ -2874,7 +2871,7 @@ static void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe,
> ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
> pixel_size,
> &sandybridge_display_srwm_info,
> - SNB_READ_WM2_LATENCY() * 500,
> + dev_priv->wm.spr_latency[2] * 500,
> &sprite_wm);
> if (!ret) {
> DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %c\n",
> @@ -2886,7 +2883,7 @@ static void sandybridge_update_sprite_wm(struct drm_device *dev, int pipe,
> ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
> pixel_size,
> &sandybridge_display_srwm_info,
> - SNB_READ_WM3_LATENCY() * 500,
> + dev_priv->wm.spr_latency[3] * 500,
> &sprite_wm);
> if (!ret) {
> DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %c\n",
> --
> 1.8.1.5
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Paulo Zanoni
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