From 3aff13cfb8810cc228e8fdcb92103ed0b11ee38e Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 31 Mar 2006 17:08:52 +1000 Subject: [PATCH] intelfb: fixup p calculation This fixes up the p calculation of p1 and p2 for the i9xx chipsets. This seems to work a lot better for lower pixel clocks.. Signed-off-by: Dave Airlie --- drivers/video/intelfb/intelfb.h | 2 +- drivers/video/intelfb/intelfbdrv.c | 2 +- drivers/video/intelfb/intelfbhw.c | 216 ++++++++++++++++++----------- drivers/video/intelfb/intelfbhw.h | 1 + 4 files changed, 137 insertions(+), 84 deletions(-) diff --git a/drivers/video/intelfb/intelfb.h b/drivers/video/intelfb/intelfb.h index 43128f9b68f0..631a3a95de40 100644 --- a/drivers/video/intelfb/intelfb.h +++ b/drivers/video/intelfb/intelfb.h @@ -286,7 +286,7 @@ struct intelfb_info { int pll_index; }; -#define IS_I9xx(dinfo) (((dinfo)->chipset == INTEL_915G)||(dinfo->chipset == INTEL_915GM)||((dinfo)->chipset == INTEL_945G)||(dinfo->chipset==INTEL_945GM)) +#define IS_I9XX(dinfo) (((dinfo)->chipset == INTEL_915G)||(dinfo->chipset == INTEL_915GM)||((dinfo)->chipset == INTEL_945G)||(dinfo->chipset==INTEL_945GM)) /*** function prototypes ***/ diff --git a/drivers/video/intelfb/intelfbdrv.c b/drivers/video/intelfb/intelfbdrv.c index 54ce74547a3e..9e83664e345c 100644 --- a/drivers/video/intelfb/intelfbdrv.c +++ b/drivers/video/intelfb/intelfbdrv.c @@ -1480,7 +1480,7 @@ intelfb_cursor(struct fb_info *info, struct fb_cursor *cursor) intelfbhw_cursor_hide(dinfo); /* If XFree killed the cursor - restore it */ - physical = (dinfo->mobile || IS_I9xx(dinfo)) ? dinfo->cursor.physical : + physical = (dinfo->mobile || IS_I9XX(dinfo)) ? dinfo->cursor.physical : (dinfo->cursor.offset << 12); if (INREG(CURSOR_A_BASEADDR) != physical) { diff --git a/drivers/video/intelfb/intelfbhw.c b/drivers/video/intelfb/intelfbhw.c index 0c3553c35808..2bcf249bdf22 100644 --- a/drivers/video/intelfb/intelfbhw.c +++ b/drivers/video/intelfb/intelfbhw.c @@ -47,8 +47,8 @@ struct pll_min_max { int min_n, max_n; int min_p, max_p; int min_p1, max_p1; - int min_vco_freq, max_vco_freq; - int p_transition_clock; + int min_vco, max_vco; + int p_transition_clk, ref_clk; int p_inc_lo, p_inc_hi; }; @@ -57,8 +57,8 @@ struct pll_min_max { #define PLLS_MAX 2 static struct pll_min_max plls[PLLS_MAX] = { - { 108, 140, 18, 26, 6, 16, 3, 16, 4, 128, 0, 31, 930000, 1400000, 165000, 4, 22 }, //I8xx - { 75, 120, 10, 20, 5, 9, 4, 7, 5, 80, 1, 8, 930000, 2800000, 200000, 10, 5 } //I9xx + { 108, 140, 18, 26, 6, 16, 3, 16, 4, 128, 0, 31, 930000, 1400000, 165000, 48000, 4, 22 }, //I8xx + { 75, 120, 10, 20, 5, 9, 4, 7, 5, 80, 1, 8, 930000, 2800000, 200000, 96000, 10, 5 } //I9xx }; int @@ -570,21 +570,26 @@ static int calc_vclock3(int index, int m, int n, int p) { if (p == 0 || n == 0) return 0; - return PLL_REFCLK * m / n / p; + return plls[index].ref_clk * m / n / p; } -static int calc_vclock(int index, int m1, int m2, int n, int p1, int p2) +static int calc_vclock(int index, int m1, int m2, int n, int p1, int p2, int lvds) { + int p2_val; switch(index) { case PLLS_I9xx: if (p1 == 0) return 0; - return ((PLL_REFCLK * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / - ((p1)) * (p2 ? 10 : 5))); + if (lvds) + p2_val = p2 ? 7 : 14; + else + p2_val = p2 ? 5 : 10; + return ((plls[index].ref_clk * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / + ((p1)) * (p2_val))); case PLLS_I8xx: default: - return ((PLL_REFCLK * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / + return ((plls[index].ref_clk * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / ((p1+2) * (1 << (p2 + 1))))); } } @@ -596,7 +601,7 @@ intelfbhw_print_hw_state(struct intelfb_info *dinfo, struct intelfb_hwstate *hw) int i, m1, m2, n, p1, p2; int index = dinfo->pll_index; DBG_MSG("intelfbhw_print_hw_state\n"); - + if (!hw || !dinfo) return; /* Read in as much of the HW state as possible. */ @@ -611,12 +616,14 @@ intelfbhw_print_hw_state(struct intelfb_info *dinfo, struct intelfb_hwstate *hw) p1 = 0; else p1 = (hw->vga_pd >> VGAPD_0_P1_SHIFT) & DPLL_P1_MASK; + p2 = (hw->vga_pd >> VGAPD_0_P2_SHIFT) & DPLL_P2_MASK; + printk(" VGA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n", m1, m2, n, p1, p2); printk(" VGA0: clock is %d\n", - calc_vclock(index, m1, m2, n, p1, p2)); - + calc_vclock(index, m1, m2, n, p1, p2, 0)); + n = (hw->vga1_divisor >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK; m1 = (hw->vga1_divisor >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK; m2 = (hw->vga1_divisor >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK; @@ -627,39 +634,96 @@ intelfbhw_print_hw_state(struct intelfb_info *dinfo, struct intelfb_hwstate *hw) p2 = (hw->vga_pd >> VGAPD_1_P2_SHIFT) & DPLL_P2_MASK; printk(" VGA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n", m1, m2, n, p1, p2); - printk(" VGA1: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2)); - + printk(" VGA1: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2, 0)); + printk(" DPLL_A: 0x%08x\n", hw->dpll_a); printk(" DPLL_B: 0x%08x\n", hw->dpll_b); printk(" FPA0: 0x%08x\n", hw->fpa0); printk(" FPA1: 0x%08x\n", hw->fpa1); printk(" FPB0: 0x%08x\n", hw->fpb0); printk(" FPB1: 0x%08x\n", hw->fpb1); - + n = (hw->fpa0 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK; m1 = (hw->fpa0 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK; m2 = (hw->fpa0 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK; - if (hw->dpll_a & DPLL_P1_FORCE_DIV2) - p1 = 0; - else - p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & DPLL_P1_MASK; - p2 = (hw->dpll_a >> DPLL_P2_SHIFT) & DPLL_P2_MASK; + + if (IS_I9XX(dinfo)) { + int tmpp1; + + if (hw->dpll_a & DPLL_P1_FORCE_DIV2) + p1 = 0; + else + p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & 0xff; + + tmpp1 = p1; + + switch (tmpp1) + { + case 0x1: p1 = 1; break; + case 0x2: p1 = 2; break; + case 0x4: p1 = 3; break; + case 0x8: p1 = 4; break; + case 0x10: p1 = 5; break; + case 0x20: p1 = 6; break; + case 0x40: p1 = 7; break; + case 0x80: p1 = 8; break; + default: break; + } + + p2 = (hw->dpll_a >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK; + + } else { + if (hw->dpll_a & DPLL_P1_FORCE_DIV2) + p1 = 0; + else + p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & DPLL_P1_MASK; + p2 = (hw->dpll_a >> DPLL_P2_SHIFT) & DPLL_P2_MASK; + } + printk(" PLLA0: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n", m1, m2, n, p1, p2); - printk(" PLLA0: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2)); - + printk(" PLLA0: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2, 0)); + n = (hw->fpa1 >> FP_N_DIVISOR_SHIFT) & FP_DIVISOR_MASK; m1 = (hw->fpa1 >> FP_M1_DIVISOR_SHIFT) & FP_DIVISOR_MASK; m2 = (hw->fpa1 >> FP_M2_DIVISOR_SHIFT) & FP_DIVISOR_MASK; - if (hw->dpll_a & DPLL_P1_FORCE_DIV2) - p1 = 0; - else - p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & DPLL_P1_MASK; - p2 = (hw->dpll_a >> DPLL_P2_SHIFT) & DPLL_P2_MASK; + + if (IS_I9XX(dinfo)) { + int tmpp1; + + if (hw->dpll_a & DPLL_P1_FORCE_DIV2) + p1 = 0; + else + p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & 0xff; + + tmpp1 = p1; + + switch (tmpp1) + { + case 0x1: p1 = 1; break; + case 0x2: p1 = 2; break; + case 0x4: p1 = 3; break; + case 0x8: p1 = 4; break; + case 0x10: p1 = 5; break; + case 0x20: p1 = 6; break; + case 0x40: p1 = 7; break; + case 0x80: p1 = 8; break; + default: break; + } + + p2 = (hw->dpll_a >> DPLL_I9XX_P2_SHIFT) & DPLL_P2_MASK; + + } else { + if (hw->dpll_a & DPLL_P1_FORCE_DIV2) + p1 = 0; + else + p1 = (hw->dpll_a >> DPLL_P1_SHIFT) & DPLL_P1_MASK; + p2 = (hw->dpll_a >> DPLL_P2_SHIFT) & DPLL_P2_MASK; + } printk(" PLLA1: (m1, m2, n, p1, p2) = (%d, %d, %d, %d, %d)\n", m1, m2, n, p1, p2); - printk(" PLLA1: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2)); - + printk(" PLLA1: clock is %d\n", calc_vclock(index, m1, m2, n, p1, p2, 0)); + #if 0 printk(" PALETTE_A:\n"); for (i = 0; i < PALETTE_8_ENTRIES) @@ -767,7 +831,7 @@ splitm(int index, unsigned int m, unsigned int *retm1, unsigned int *retm2) /* no point optimising too much - brute force m */ for (m1 = plls[index].min_m1; m1 < plls[index].max_m1+1; m1++) { for (m2 = plls[index].min_m2; m2 < plls[index].max_m2+1; m2++) { - testm = ( 5 * ( m1 + 2 )) + (m2 + 2); + testm = (5 * (m1 + 2)) + (m2 + 2); if (testm == m) { *retm1 = (unsigned int)m1; *retm2 = (unsigned int)m2; @@ -785,21 +849,11 @@ splitp(int index, unsigned int p, unsigned int *retp1, unsigned int *retp2) int p1, p2; if (index == PLLS_I9xx) { - switch (p) { - case 10: - p1 = 2; - p2 = 0; - break; - case 20: - p1 = 1; - p2 = 0; - break; - default: - p1 = (p / 10) + 1; - p2 = 0; - break; - } - + + p2 = 0; // for now + + p1 = p / (p2 ? 5 : 10); + *retp1 = (unsigned int)p1; *retp2 = (unsigned int)p2; return 0; @@ -844,13 +898,13 @@ calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2, u32 *retn, u32 *re DBG_MSG("Clock is %d\n", clock); - div_max = plls[index].max_vco_freq / clock; + div_max = plls[index].max_vco / clock; if (index == PLLS_I9xx) div_min = 5; else - div_min = ROUND_UP_TO(plls[index].min_vco_freq, clock) / clock; + div_min = ROUND_UP_TO(plls[index].min_vco, clock) / clock; - if (clock <= plls[index].p_transition_clock) + if (clock <= plls[index].p_transition_clk) p_inc = plls[index].p_inc_lo; else p_inc = plls[index].p_inc_hi; @@ -861,15 +915,6 @@ calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2, u32 *retn, u32 *re if (p_max > plls[index].max_p) p_max = plls[index].max_p; - if (clock < PLL_REFCLK && index == PLLS_I9xx) { - p_min = 10; - p_max = 20; - /* this makes 640x480 work it really shouldn't - - SOMEONE WITHOUT DOCS WOZ HERE */ - if (clock < 30000) - clock *= 4; - } - DBG_MSG("p range is %d-%d (%d)\n", p_min, p_max, p_inc); p = p_min; @@ -883,7 +928,7 @@ calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2, u32 *retn, u32 *re f_vco = clock * p; do { - m = ROUND_UP_TO(f_vco * n, PLL_REFCLK) / PLL_REFCLK; + m = ROUND_UP_TO(f_vco * n, plls[index].ref_clk) / plls[index].ref_clk; if (m < plls[index].min_m) m = plls[index].min_m + 1; if (m > plls[index].max_m) @@ -899,7 +944,7 @@ calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2, u32 *retn, u32 *re f_err = clock - f_out; else/* slightly bias the error for bigger clocks */ f_err = f_out - clock + 1; - + if (f_err < err_best) { m_best = m; n_best = n; @@ -928,14 +973,14 @@ calc_pll_params(int index, int clock, u32 *retm1, u32 *retm2, u32 *retn, u32 *re "f: %d (%d), VCO: %d\n", m, m1, m2, n, n1, p, p1, p2, calc_vclock3(index, m, n, p), - calc_vclock(index, m1, m2, n1, p1, p2), + calc_vclock(index, m1, m2, n1, p1, p2, 0), calc_vclock3(index, m, n, p) * p); *retm1 = m1; *retm2 = m2; *retn = n1; *retp1 = p1; *retp2 = p2; - *retclock = calc_vclock(index, m1, m2, n1, p1, p2); + *retclock = calc_vclock(index, m1, m2, n1, p1, p2, 0); return 0; } @@ -1032,7 +1077,7 @@ intelfbhw_mode_to_hw(struct intelfb_info *dinfo, struct intelfb_hwstate *hw, /* Desired clock in kHz */ clock_target = 1000000000 / var->pixclock; - if (calc_pll_params(dinfo->pll_index, clock_target, &m1, &m2, + if (calc_pll_params(dinfo->pll_index, clock_target, &m1, &m2, &n, &p1, &p2, &clock)) { WRN_MSG("calc_pll_params failed\n"); return 1; @@ -1053,7 +1098,14 @@ intelfbhw_mode_to_hw(struct intelfb_info *dinfo, struct intelfb_hwstate *hw, *dpll &= ~DPLL_P1_FORCE_DIV2; *dpll &= ~((DPLL_P2_MASK << DPLL_P2_SHIFT) | (DPLL_P1_MASK << DPLL_P1_SHIFT)); - *dpll |= (p2 << DPLL_P2_SHIFT) | (p1 << DPLL_P1_SHIFT); + + if (IS_I9XX(dinfo)) { + *dpll |= (p2 << DPLL_I9XX_P2_SHIFT); + *dpll |= (1 << (p1 - 1)) << DPLL_P1_SHIFT; + } else { + *dpll |= (p2 << DPLL_P2_SHIFT) | (p1 << DPLL_P1_SHIFT); + } + *fp0 = (n << FP_N_DIVISOR_SHIFT) | (m1 << FP_M1_DIVISOR_SHIFT) | (m2 << FP_M2_DIVISOR_SHIFT); @@ -1264,19 +1316,19 @@ intelfbhw_program_mode(struct intelfb_info *dinfo, tmp = INREG(pipe_conf_reg); tmp &= ~PIPECONF_ENABLE; OUTREG(pipe_conf_reg, tmp); - + count = 0; do { - tmp_val[count%3] = INREG(0x70000); - if ((tmp_val[0] == tmp_val[1]) && (tmp_val[1]==tmp_val[2])) - break; - count++; - udelay(1); - if (count % 200 == 0) { - tmp = INREG(pipe_conf_reg); - tmp &= ~PIPECONF_ENABLE; - OUTREG(pipe_conf_reg, tmp); - } + tmp_val[count%3] = INREG(0x70000); + if ((tmp_val[0] == tmp_val[1]) && (tmp_val[1]==tmp_val[2])) + break; + count++; + udelay(1); + if (count % 200 == 0) { + tmp = INREG(pipe_conf_reg); + tmp &= ~PIPECONF_ENABLE; + OUTREG(pipe_conf_reg, tmp); + } } while(count < 2000); OUTREG(ADPA, INREG(ADPA) & ~ADPA_DAC_ENABLE); @@ -1289,7 +1341,7 @@ intelfbhw_program_mode(struct intelfb_info *dinfo, tmp &= ~DISPPLANE_PLANE_ENABLE; OUTREG(DSPBCNTR, tmp); - /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */ + /* Wait for vblank. For now, just wait for a 50Hz cycle (20ms)) */ mdelay(20); /* Disable Sync */ @@ -1359,7 +1411,7 @@ intelfbhw_program_mode(struct intelfb_info *dinfo, OUTREG(DSPACNTR, hw->disp_a_ctrl|DISPPLANE_PLANE_ENABLE); mdelay(1); - } + } } OUTREG(DSPACNTR, hw->disp_a_ctrl & ~DISPPLANE_PLANE_ENABLE); @@ -1744,7 +1796,7 @@ intelfbhw_cursor_init(struct intelfb_info *dinfo) DBG_MSG("intelfbhw_cursor_init\n"); #endif - if (dinfo->mobile || IS_I9xx(dinfo)) { + if (dinfo->mobile || IS_I9XX(dinfo)) { if (!dinfo->cursor.physical) return; tmp = INREG(CURSOR_A_CONTROL); @@ -1777,7 +1829,7 @@ intelfbhw_cursor_hide(struct intelfb_info *dinfo) #endif dinfo->cursor_on = 0; - if (dinfo->mobile || IS_I9xx(dinfo)) { + if (dinfo->mobile || IS_I9XX(dinfo)) { if (!dinfo->cursor.physical) return; tmp = INREG(CURSOR_A_CONTROL); @@ -1807,7 +1859,7 @@ intelfbhw_cursor_show(struct intelfb_info *dinfo) if (dinfo->cursor_blanked) return; - if (dinfo->mobile || IS_I9xx(dinfo)) { + if (dinfo->mobile || IS_I9XX(dinfo)) { if (!dinfo->cursor.physical) return; tmp = INREG(CURSOR_A_CONTROL); @@ -1833,8 +1885,8 @@ intelfbhw_cursor_setpos(struct intelfb_info *dinfo, int x, int y) #endif /* - * Sets the position. The coordinates are assumed to already - * have any offset adjusted. Assume that the cursor is never + * Sets the position. The coordinates are assumed to already + * have any offset adjusted. Assume that the cursor is never * completely off-screen, and that x, y are always >= 0. */ @@ -1842,7 +1894,7 @@ intelfbhw_cursor_setpos(struct intelfb_info *dinfo, int x, int y) ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT); OUTREG(CURSOR_A_POSITION, tmp); - if (IS_I9xx(dinfo)) { + if (IS_I9XX(dinfo)) { OUTREG(CURSOR_A_BASEADDR, dinfo->cursor.physical); } } diff --git a/drivers/video/intelfb/intelfbhw.h b/drivers/video/intelfb/intelfbhw.h index a3ec8f92eb64..10acda098b71 100644 --- a/drivers/video/intelfb/intelfbhw.h +++ b/drivers/video/intelfb/intelfbhw.h @@ -133,6 +133,7 @@ #define DPLL_VGA_MODE_DISABLE (1 << 28) #define DPLL_P2_MASK 1 #define DPLL_P2_SHIFT 23 +#define DPLL_I9XX_P2_SHIFT 24 #define DPLL_P1_FORCE_DIV2 (1 << 21) #define DPLL_P1_MASK 0x1f #define DPLL_P1_SHIFT 16 -- 2.34.1