drm/i915: Contract the magic IPS constants into a direct LUT
... and no need to perform a linear search for the index.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 86b0e80..7084de7 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1396,152 +1396,12 @@
}
}
-struct v_table {
- u8 vid;
- unsigned long vd; /* in .1 mil */
- unsigned long vm; /* in .1 mil */
- u8 pvid;
-};
-
-static struct v_table v_table[] = {
- { 0, 16125, 15000, 0x7f, },
- { 1, 16000, 14875, 0x7e, },
- { 2, 15875, 14750, 0x7d, },
- { 3, 15750, 14625, 0x7c, },
- { 4, 15625, 14500, 0x7b, },
- { 5, 15500, 14375, 0x7a, },
- { 6, 15375, 14250, 0x79, },
- { 7, 15250, 14125, 0x78, },
- { 8, 15125, 14000, 0x77, },
- { 9, 15000, 13875, 0x76, },
- { 10, 14875, 13750, 0x75, },
- { 11, 14750, 13625, 0x74, },
- { 12, 14625, 13500, 0x73, },
- { 13, 14500, 13375, 0x72, },
- { 14, 14375, 13250, 0x71, },
- { 15, 14250, 13125, 0x70, },
- { 16, 14125, 13000, 0x6f, },
- { 17, 14000, 12875, 0x6e, },
- { 18, 13875, 12750, 0x6d, },
- { 19, 13750, 12625, 0x6c, },
- { 20, 13625, 12500, 0x6b, },
- { 21, 13500, 12375, 0x6a, },
- { 22, 13375, 12250, 0x69, },
- { 23, 13250, 12125, 0x68, },
- { 24, 13125, 12000, 0x67, },
- { 25, 13000, 11875, 0x66, },
- { 26, 12875, 11750, 0x65, },
- { 27, 12750, 11625, 0x64, },
- { 28, 12625, 11500, 0x63, },
- { 29, 12500, 11375, 0x62, },
- { 30, 12375, 11250, 0x61, },
- { 31, 12250, 11125, 0x60, },
- { 32, 12125, 11000, 0x5f, },
- { 33, 12000, 10875, 0x5e, },
- { 34, 11875, 10750, 0x5d, },
- { 35, 11750, 10625, 0x5c, },
- { 36, 11625, 10500, 0x5b, },
- { 37, 11500, 10375, 0x5a, },
- { 38, 11375, 10250, 0x59, },
- { 39, 11250, 10125, 0x58, },
- { 40, 11125, 10000, 0x57, },
- { 41, 11000, 9875, 0x56, },
- { 42, 10875, 9750, 0x55, },
- { 43, 10750, 9625, 0x54, },
- { 44, 10625, 9500, 0x53, },
- { 45, 10500, 9375, 0x52, },
- { 46, 10375, 9250, 0x51, },
- { 47, 10250, 9125, 0x50, },
- { 48, 10125, 9000, 0x4f, },
- { 49, 10000, 8875, 0x4e, },
- { 50, 9875, 8750, 0x4d, },
- { 51, 9750, 8625, 0x4c, },
- { 52, 9625, 8500, 0x4b, },
- { 53, 9500, 8375, 0x4a, },
- { 54, 9375, 8250, 0x49, },
- { 55, 9250, 8125, 0x48, },
- { 56, 9125, 8000, 0x47, },
- { 57, 9000, 7875, 0x46, },
- { 58, 8875, 7750, 0x45, },
- { 59, 8750, 7625, 0x44, },
- { 60, 8625, 7500, 0x43, },
- { 61, 8500, 7375, 0x42, },
- { 62, 8375, 7250, 0x41, },
- { 63, 8250, 7125, 0x40, },
- { 64, 8125, 7000, 0x3f, },
- { 65, 8000, 6875, 0x3e, },
- { 66, 7875, 6750, 0x3d, },
- { 67, 7750, 6625, 0x3c, },
- { 68, 7625, 6500, 0x3b, },
- { 69, 7500, 6375, 0x3a, },
- { 70, 7375, 6250, 0x39, },
- { 71, 7250, 6125, 0x38, },
- { 72, 7125, 6000, 0x37, },
- { 73, 7000, 5875, 0x36, },
- { 74, 6875, 5750, 0x35, },
- { 75, 6750, 5625, 0x34, },
- { 76, 6625, 5500, 0x33, },
- { 77, 6500, 5375, 0x32, },
- { 78, 6375, 5250, 0x31, },
- { 79, 6250, 5125, 0x30, },
- { 80, 6125, 5000, 0x2f, },
- { 81, 6000, 4875, 0x2e, },
- { 82, 5875, 4750, 0x2d, },
- { 83, 5750, 4625, 0x2c, },
- { 84, 5625, 4500, 0x2b, },
- { 85, 5500, 4375, 0x2a, },
- { 86, 5375, 4250, 0x29, },
- { 87, 5250, 4125, 0x28, },
- { 88, 5125, 4000, 0x27, },
- { 89, 5000, 3875, 0x26, },
- { 90, 4875, 3750, 0x25, },
- { 91, 4750, 3625, 0x24, },
- { 92, 4625, 3500, 0x23, },
- { 93, 4500, 3375, 0x22, },
- { 94, 4375, 3250, 0x21, },
- { 95, 4250, 3125, 0x20, },
- { 96, 4125, 3000, 0x1f, },
- { 97, 4125, 3000, 0x1e, },
- { 98, 4125, 3000, 0x1d, },
- { 99, 4125, 3000, 0x1c, },
- { 100, 4125, 3000, 0x1b, },
- { 101, 4125, 3000, 0x1a, },
- { 102, 4125, 3000, 0x19, },
- { 103, 4125, 3000, 0x18, },
- { 104, 4125, 3000, 0x17, },
- { 105, 4125, 3000, 0x16, },
- { 106, 4125, 3000, 0x15, },
- { 107, 4125, 3000, 0x14, },
- { 108, 4125, 3000, 0x13, },
- { 109, 4125, 3000, 0x12, },
- { 110, 4125, 3000, 0x11, },
- { 111, 4125, 3000, 0x10, },
- { 112, 4125, 3000, 0x0f, },
- { 113, 4125, 3000, 0x0e, },
- { 114, 4125, 3000, 0x0d, },
- { 115, 4125, 3000, 0x0c, },
- { 116, 4125, 3000, 0x0b, },
- { 117, 4125, 3000, 0x0a, },
- { 118, 4125, 3000, 0x09, },
- { 119, 4125, 3000, 0x08, },
- { 120, 1125, 0, 0x07, },
- { 121, 1000, 0, 0x06, },
- { 122, 875, 0, 0x05, },
- { 123, 750, 0, 0x04, },
- { 124, 625, 0, 0x03, },
- { 125, 500, 0, 0x02, },
- { 126, 375, 0, 0x01, },
- { 127, 0, 0, 0x00, },
-};
-
-struct cparams {
- int i;
- int t;
- int m;
- int c;
-};
-
-static struct cparams cparams[] = {
+static const struct cparams {
+ u16 i;
+ u16 t;
+ u16 m;
+ u16 c;
+} cparams[] = {
{ 1, 1333, 301, 28664 },
{ 1, 1066, 294, 24460 },
{ 1, 800, 294, 25192 },
@@ -1607,21 +1467,145 @@
return ((m * x) / 127) - b;
}
-static unsigned long pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
+static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
{
- unsigned long val = 0;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(v_table); i++) {
- if (v_table[i].pvid == pxvid) {
- if (IS_MOBILE(dev_priv->dev))
- val = v_table[i].vm;
- else
- val = v_table[i].vd;
- }
- }
-
- return val;
+ static const struct v_table {
+ u16 vd; /* in .1 mil */
+ u16 vm; /* in .1 mil */
+ } v_table[] = {
+ { 0, 0, },
+ { 375, 0, },
+ { 500, 0, },
+ { 625, 0, },
+ { 750, 0, },
+ { 875, 0, },
+ { 1000, 0, },
+ { 1125, 0, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4125, 3000, },
+ { 4250, 3125, },
+ { 4375, 3250, },
+ { 4500, 3375, },
+ { 4625, 3500, },
+ { 4750, 3625, },
+ { 4875, 3750, },
+ { 5000, 3875, },
+ { 5125, 4000, },
+ { 5250, 4125, },
+ { 5375, 4250, },
+ { 5500, 4375, },
+ { 5625, 4500, },
+ { 5750, 4625, },
+ { 5875, 4750, },
+ { 6000, 4875, },
+ { 6125, 5000, },
+ { 6250, 5125, },
+ { 6375, 5250, },
+ { 6500, 5375, },
+ { 6625, 5500, },
+ { 6750, 5625, },
+ { 6875, 5750, },
+ { 7000, 5875, },
+ { 7125, 6000, },
+ { 7250, 6125, },
+ { 7375, 6250, },
+ { 7500, 6375, },
+ { 7625, 6500, },
+ { 7750, 6625, },
+ { 7875, 6750, },
+ { 8000, 6875, },
+ { 8125, 7000, },
+ { 8250, 7125, },
+ { 8375, 7250, },
+ { 8500, 7375, },
+ { 8625, 7500, },
+ { 8750, 7625, },
+ { 8875, 7750, },
+ { 9000, 7875, },
+ { 9125, 8000, },
+ { 9250, 8125, },
+ { 9375, 8250, },
+ { 9500, 8375, },
+ { 9625, 8500, },
+ { 9750, 8625, },
+ { 9875, 8750, },
+ { 10000, 8875, },
+ { 10125, 9000, },
+ { 10250, 9125, },
+ { 10375, 9250, },
+ { 10500, 9375, },
+ { 10625, 9500, },
+ { 10750, 9625, },
+ { 10875, 9750, },
+ { 11000, 9875, },
+ { 11125, 10000, },
+ { 11250, 10125, },
+ { 11375, 10250, },
+ { 11500, 10375, },
+ { 11625, 10500, },
+ { 11750, 10625, },
+ { 11875, 10750, },
+ { 12000, 10875, },
+ { 12125, 11000, },
+ { 12250, 11125, },
+ { 12375, 11250, },
+ { 12500, 11375, },
+ { 12625, 11500, },
+ { 12750, 11625, },
+ { 12875, 11750, },
+ { 13000, 11875, },
+ { 13125, 12000, },
+ { 13250, 12125, },
+ { 13375, 12250, },
+ { 13500, 12375, },
+ { 13625, 12500, },
+ { 13750, 12625, },
+ { 13875, 12750, },
+ { 14000, 12875, },
+ { 14125, 13000, },
+ { 14250, 13125, },
+ { 14375, 13250, },
+ { 14500, 13375, },
+ { 14625, 13500, },
+ { 14750, 13625, },
+ { 14875, 13750, },
+ { 15000, 13875, },
+ { 15125, 14000, },
+ { 15250, 14125, },
+ { 15375, 14250, },
+ { 15500, 14375, },
+ { 15625, 14500, },
+ { 15750, 14625, },
+ { 15875, 14750, },
+ { 16000, 14875, },
+ { 16125, 15000, },
+ };
+ if (dev_priv->info->is_mobile)
+ return v_table[pxvid].vm;
+ else
+ return v_table[pxvid].vd;
}
void i915_update_gfx_val(struct drm_i915_private *dev_priv)