[PATCH v4 6/8] drm/i915/skl: Add variables to check x_tile and y_tile

["Kumar, Mahesh" <mahesh1.kumar@intel.com>]

From: Mahesh Kumar <mahesh1.kumar@intel.com>

This patch adds variable to check for X_tiled & y_tiled planes, instead
of always checking against framebuffer-modifiers.

Changes:
 - Created separate patch as per Paulo's comment
 - Added x_tiled variable as well

Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a668204..0eaaadc 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3602,6 +3602,7 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 	uint32_t plane_pixel_rate;
 	uint32_t y_tile_minimum, y_min_scanlines;
 	enum watermark_memory_wa mem_wa;
+	bool y_tiled = false, x_tiled = false;
 
 	if (latency == 0 || !cstate->base.active || !intel_pstate->base.visible)
 		return 0;
@@ -3621,6 +3622,12 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 	cpp = drm_format_plane_cpp(fb->pixel_format, 0);
 	plane_pixel_rate = skl_adjusted_plane_pixel_rate(cstate, intel_pstate);
 
+	if (fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
+	    fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED)
+		y_tiled = true;
+	else if (fb->modifier[0] == I915_FORMAT_MOD_X_TILED)
+		x_tiled = true;
+
 	if (intel_rotation_90_or_270(pstate->rotation)) {
 		int cpp = (fb->pixel_format == DRM_FORMAT_NV12) ?
 			drm_format_plane_cpp(fb->pixel_format, 1) :
@@ -3648,16 +3655,15 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 		y_min_scanlines *= 2;
 
 	plane_bytes_per_line = width * cpp;
-	if (fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
-	    fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED) {
+	if (y_tiled) {
 		plane_blocks_per_line =
 		      DIV_ROUND_UP(plane_bytes_per_line * y_min_scanlines, 512);
 		plane_blocks_per_line /= y_min_scanlines;
-	} else if (fb->modifier[0] == DRM_FORMAT_MOD_NONE) {
+	} else if (x_tiled) {
+		plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512);
+	} else {
 		plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512)
 					+ 1;
-	} else {
-		plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512);
 	}
 
 	method1 = skl_wm_method1(plane_pixel_rate, cpp, latency);
@@ -3668,8 +3674,7 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 
 	y_tile_minimum = plane_blocks_per_line * y_min_scanlines;
 
-	if (fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
-	    fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED) {
+	if (y_tiled) {
 		selected_result = max(method2, y_tile_minimum);
 	} else {
 		uint32_t linetime_us = 0;
@@ -3689,8 +3694,7 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 	res_lines = DIV_ROUND_UP(selected_result, plane_blocks_per_line);
 
 	if (level >= 1 && level <= 7) {
-		if (fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
-		    fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED) {
+		if (y_tiled) {
 			res_blocks += y_tile_minimum;
 			res_lines += y_min_scanlines;
 		} else {
-- 
2.10.1

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