drm/mgag200: Split PLL compute functions by device type
Several PLL functions compute values for different device types. Split them up to make the code more readable. No functional changes. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Acked-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-8-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
parent
2dd040946e
commit
35b36ff449
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@ -349,7 +349,7 @@ static int mgag200_compute_pixpll_values_g200wb(struct mga_device *mdev, long cl
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{
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unsigned int vcomax, vcomin, pllreffreq;
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unsigned int delta, tmpdelta;
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unsigned int testp, testm, testn, testp2;
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unsigned int testp, testm, testn;
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unsigned int p, m, n, s;
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unsigned int computed;
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@ -357,64 +357,29 @@ static int mgag200_compute_pixpll_values_g200wb(struct mga_device *mdev, long cl
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delta = 0xffffffff;
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if (mdev->type == G200_EW3) {
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vcomax = 800000;
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vcomin = 400000;
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pllreffreq = 25000;
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vcomax = 550000;
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vcomin = 150000;
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pllreffreq = 48000;
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for (testp = 1; testp < 8; testp++) {
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for (testp2 = 1; testp2 < 8; testp2++) {
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if (testp < testp2)
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continue;
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if ((clock * testp * testp2) > vcomax)
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continue;
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if ((clock * testp * testp2) < vcomin)
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continue;
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for (testm = 1; testm < 26; testm++) {
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for (testn = 32; testn < 2048 ; testn++) {
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computed = (pllreffreq * testn) /
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(testm * testp * testp2);
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if (computed > clock)
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tmpdelta = computed - clock;
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else
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tmpdelta = clock - computed;
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if (tmpdelta < delta) {
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delta = tmpdelta;
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m = testm + 1;
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n = testn + 1;
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p = testp + 1;
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s = testp2;
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}
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}
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}
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}
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}
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} else {
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vcomax = 550000;
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vcomin = 150000;
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pllreffreq = 48000;
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for (testp = 1; testp < 9; testp++) {
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if (clock * testp > vcomax)
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continue;
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if (clock * testp < vcomin)
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continue;
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for (testp = 1; testp < 9; testp++) {
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if (clock * testp > vcomax)
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continue;
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if (clock * testp < vcomin)
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continue;
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for (testm = 1; testm < 17; testm++) {
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for (testn = 1; testn < 151; testn++) {
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computed = (pllreffreq * testn) /
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(testm * testp);
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if (computed > clock)
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tmpdelta = computed - clock;
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else
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tmpdelta = clock - computed;
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if (tmpdelta < delta) {
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delta = tmpdelta;
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n = testn;
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m = testm;
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p = testp;
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s = 0;
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}
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for (testm = 1; testm < 17; testm++) {
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for (testn = 1; testn < 151; testn++) {
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computed = (pllreffreq * testn) / (testm * testp);
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if (computed > clock)
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tmpdelta = computed - clock;
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else
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tmpdelta = clock - computed;
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if (tmpdelta < delta) {
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delta = tmpdelta;
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n = testn;
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m = testm;
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p = testp;
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s = 0;
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}
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}
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}
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@ -671,66 +636,30 @@ static int mgag200_compute_pixpll_values_g200eh(struct mga_device *mdev, long cl
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m = n = p = s = 0;
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if (mdev->type == G200_EH3) {
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vcomax = 3000000;
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vcomin = 1500000;
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pllreffreq = 25000;
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vcomax = 800000;
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vcomin = 400000;
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pllreffreq = 33333;
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delta = 0xffffffff;
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delta = 0xffffffff;
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testp = 0;
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for (testp = 16; testp > 0; testp >>= 1) {
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if (clock * testp > vcomax)
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continue;
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if (clock * testp < vcomin)
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continue;
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for (testm = 150; testm >= 6; testm--) {
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if (clock * testm > vcomax)
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continue;
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if (clock * testm < vcomin)
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continue;
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for (testn = 120; testn >= 60; testn--) {
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computed = (pllreffreq * testn) / testm;
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for (testm = 1; testm < 33; testm++) {
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for (testn = 17; testn < 257; testn++) {
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computed = (pllreffreq * testn) / (testm * testp);
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if (computed > clock)
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tmpdelta = computed - clock;
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else
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tmpdelta = clock - computed;
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if (tmpdelta < delta) {
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delta = tmpdelta;
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n = testn + 1;
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m = testm + 1;
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p = testp + 1;
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}
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if (delta == 0)
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break;
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}
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if (delta == 0)
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break;
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}
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} else {
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vcomax = 800000;
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vcomin = 400000;
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pllreffreq = 33333;
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delta = 0xffffffff;
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for (testp = 16; testp > 0; testp >>= 1) {
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if (clock * testp > vcomax)
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continue;
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if (clock * testp < vcomin)
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continue;
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for (testm = 1; testm < 33; testm++) {
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for (testn = 17; testn < 257; testn++) {
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computed = (pllreffreq * testn) /
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(testm * testp);
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if (computed > clock)
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tmpdelta = computed - clock;
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else
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tmpdelta = clock - computed;
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if (tmpdelta < delta) {
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delta = tmpdelta;
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n = testn;
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m = testm;
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p = testp;
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}
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n = testn;
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m = testm;
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p = testp;
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}
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}
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}
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@ -812,6 +741,57 @@ static void mgag200_set_pixpll_g200eh(struct mga_device *mdev,
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}
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}
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static int mgag200_compute_pixpll_values_g200eh3(struct mga_device *mdev, long clock,
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struct mgag200_pll_values *pixpllc)
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{
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unsigned int vcomax, vcomin, pllreffreq;
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unsigned int delta, tmpdelta;
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unsigned int testp, testm, testn;
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unsigned int p, m, n, s;
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unsigned int computed;
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m = n = p = s = 0;
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vcomax = 3000000;
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vcomin = 1500000;
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pllreffreq = 25000;
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delta = 0xffffffff;
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testp = 0;
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for (testm = 150; testm >= 6; testm--) {
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if (clock * testm > vcomax)
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continue;
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if (clock * testm < vcomin)
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continue;
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for (testn = 120; testn >= 60; testn--) {
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computed = (pllreffreq * testn) / testm;
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if (computed > clock)
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tmpdelta = computed - clock;
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else
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tmpdelta = clock - computed;
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if (tmpdelta < delta) {
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delta = tmpdelta;
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n = testn + 1;
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m = testm + 1;
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p = testp + 1;
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}
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if (delta == 0)
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break;
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}
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if (delta == 0)
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break;
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}
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pixpllc->m = m;
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pixpllc->n = n;
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pixpllc->p = p;
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pixpllc->s = s;
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return 0;
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}
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static int mgag200_compute_pixpll_values_g200er(struct mga_device *mdev, long clock,
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struct mgag200_pll_values *pixpllc)
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{
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@ -916,6 +896,58 @@ static void mgag200_set_pixpll_g200er(struct mga_device *mdev,
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udelay(50);
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}
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static int mgag200_compute_pixpll_values_g200ew3(struct mga_device *mdev, long clock,
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struct mgag200_pll_values *pixpllc)
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{
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unsigned int vcomax, vcomin, pllreffreq;
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unsigned int delta, tmpdelta;
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unsigned int testp, testm, testn, testp2;
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unsigned int p, m, n, s;
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unsigned int computed;
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m = n = p = s = 0;
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delta = 0xffffffff;
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vcomax = 800000;
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vcomin = 400000;
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pllreffreq = 25000;
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for (testp = 1; testp < 8; testp++) {
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for (testp2 = 1; testp2 < 8; testp2++) {
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if (testp < testp2)
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continue;
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if ((clock * testp * testp2) > vcomax)
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continue;
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if ((clock * testp * testp2) < vcomin)
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continue;
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for (testm = 1; testm < 26; testm++) {
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for (testn = 32; testn < 2048 ; testn++) {
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computed = (pllreffreq * testn) / (testm * testp * testp2);
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if (computed > clock)
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tmpdelta = computed - clock;
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else
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tmpdelta = clock - computed;
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if (tmpdelta < delta) {
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delta = tmpdelta;
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m = testm + 1;
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n = testn + 1;
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p = testp + 1;
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s = testp2;
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}
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}
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}
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}
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}
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pixpllc->m = m;
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pixpllc->n = n;
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pixpllc->p = p;
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pixpllc->s = s;
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return 0;
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}
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static void mgag200_crtc_set_plls(struct mga_device *mdev, long clock)
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{
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struct mgag200_pll_values pixpll;
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@ -931,19 +963,23 @@ static void mgag200_crtc_set_plls(struct mga_device *mdev, long clock)
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ret = mgag200_compute_pixpll_values_g200se(mdev, clock, &pixpll);
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break;
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case G200_WB:
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case G200_EW3:
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ret = mgag200_compute_pixpll_values_g200wb(mdev, clock, &pixpll);
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break;
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case G200_EV:
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ret = mgag200_compute_pixpll_values_g200ev(mdev, clock, &pixpll);
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break;
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case G200_EH:
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case G200_EH3:
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ret = mgag200_compute_pixpll_values_g200eh(mdev, clock, &pixpll);
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break;
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case G200_EH3:
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ret = mgag200_compute_pixpll_values_g200eh3(mdev, clock, &pixpll);
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break;
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case G200_ER:
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ret = mgag200_compute_pixpll_values_g200er(mdev, clock, &pixpll);
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break;
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case G200_EW3:
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ret = mgag200_compute_pixpll_values_g200ew3(mdev, clock, &pixpll);
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break;
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}
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if (ret)
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